Automated Data Plotter

This application dynamically generates many types of graphs. These graphs are derived from processing of various data sources done by the IEM. Please feel free to use these generated graphics in whatever way you wish.


First, select a chart type::



Visual Overview of All Autoplots

Below you will find an example resulting image from each of the autoplots available. Click on the image or title to navigate to that autoplot. These are grouped into sections as they also appear grouped in the dropdown selection box above.

Daily

#51. Accumulated Station Departures of Precip/GDD/SDD (Automated Stations)


This plot presents accumulated totals and departures of growing degree days, precipitation and stress degree days. Leap days are not considered for this plot. The light blue area represents the

#108. Accumulated Station Departures of Precip/GDD/SDD (Long Term Climate)


This plot presents accumulated totals and departures of growing degree days, precipitation and stress degree days. Leap days are not considered for this plot. The light blue area represents the

#172. Accumulated Year to Date Precipitation


This chart presents year to date accumulated precipitation for a station of your choice. The year with the highest and lowest accumulation is shown along with the envelop of observations

#149. Arridity Index (High Temperature minus Precip Departures)


This plot presents a time series of Arridity Index. This index computes the standardized high temperature departure subtracted by the standardized precipitation departure. For the purposes of this plot, this

#11. ASOS/AWOS Daily Min/Max Dew Point/Temp/Feels Like/RH for a Year


This plot presents the range between the min and maximum observation of your choice for a given station and a given year. Some of these values are only computed based

#94. Bias of 24 Hour High+Low Computation by Hour


This plot looks at the effect of splitting a 24 hour period at different hours of the day. Using the hourly temperature record, we can look at the bias of

#96. Bias of 24 Hour Precipitation Computation by Hour


This plot looks at the bias associated with computing 24 hour precipitation totals using a given hour of the day as the delimiter. This plot will take a number of

#82. Calendar of Daily Observations from Automated Stations


This chart presents a series of daily summary data as a calendar. The daily totals should be valid for the local day of the weather station.

#180. Daily Temperature Climatology


This application plots daily climatology for a location or two of your choice.

#32. Daily Temperature Departures for One Year


This plot presents the daily high, low, or average temperature departure. The average temperature is simply the average of the daily high and low. The daily climatology is simply based

#21. Change in NCDC 81 Daily Climatology over X Days


This map displays an analysis of the change in average high or low temperature over a time period of your choice.

#174. Compare Daily High/Low Temps for ASOS Stations


This application generates a comparison of daily high and low temperatures between two automated ASOS sites of your choosing.

#91. Consecutative Day Statistics of High+Low Temps / Precip


This plot produces statistics on min, max, and average values of a variable over a window of days. The labels get a bit confusing, but we are looking for previous

#66. Consecutative Days with High/Low Temp Above/Below Threshold


This chart presents the daily frequency of the given date having the prescribed number of previous days above or below some provided treshold.

#9. Cooling/Growing/Heating/Stress Degree Day Daily Values and Climatology


This chart produces the daily climatology of Degree Days for a location of your choice. Please note that Feb 29 is not considered for this analysis.

#49. Daily/Multi-Day Frequency of Some Threshold (snow, precip, temps)


This plot presents the observed frequency of some daily event happening. Leap day (Feb 29th) is excluded from the analysis. If you download the data from this application, a placeholder

#176. Daily Records Beat Margin


This chart shows the margin by which new daily high and low temperatures set are beaten by.

#5. Daily Records for each month of year


This plot displays the dates with the monthly record of your choice displayed. In the case of ties, only the most recent occurence is shown.

#31. Extreme Jumps or Dips in High/Low Temperature over X days


This chart attempts to assess by now much the high temperature can change between two or three periods of time. These periods are defined by the consecutive number of days

#147. Frequency of One Station Warmer/Wetter than Another


This plot presents the daily frequency of the first station having a higher value than the second station.

#204. Heatmap of Daily / Trailing Daily Temperature / Precip


This app generates a heatmap-like presentation of daily climate data of your choice. In the case of 'Trailing XX Days', you will want to set a trailing number of days

#61. High/Low Temp above/below avg OR dry streaks by NWS CLI Sites


This plot presents the current streak of days with a high or low temperature above or at/below the daily average temperature. You can also plot the number of days since

#19. Histogram of Daily High/Low Temperatures


This chart displays a histogram of daily high and low temperatures for a station of your choice. If you optionally choose to overlay a given year's data and select winter,

#35. Histogram of X Hour Temp/RH/Dew/Pressure Changes


This plot presents a histogram of the change in some observed variable over a given number of hours.

#60. Hourly Temperature/Dew Point/RH Frequencies Above/Below Threshold


This plot presents the hourly frequency of having a certain temperature above or below a given threshold. Values are partitioned by week of the year to smooth out some of

#86. IEM Daily Reanalysis Plots


This map presents a daily IEM ReAnalysis variable of your choice.

#139. Largest / Smallest Local Calendar Day Temperature Differences


This table presents the 10 largest or smallest differences between the lowest and highest air temperature for a local calendar day.

#168. Latest Date of Year for High Temperature


This chart presents the last date of fall or first date of spring that a given temperature threshold was last or first reached. Note that leap day creates some ambiguity

#207. Local Storm Report + COOP Snowfall Analysis Maps


Generates an analysis map of snowfall data based on NWS Local Storm Reports. This autoplot presents a number of tunables including: The window of hours to look before the

#206. Map of Daily Automated Station Summaries


Generates analysis maps of ASOS/AWOS station data for a given date.

#97. Map of Departures/Stats over One Period of Days


This application plots an analysis of station data for a period of your choice. Spatially aggregated values like those for climate districts and statewide averages are not included. For this

#34. Max Stretch of Days with High/Low Above/Below Threshold


This plot displays the maximum number of consec days above or below some threshold for high or low temperature.

#26. Min Daily Low after 1 July / Max Daily High for year


This plot presents the climatology and actual year's progression of warmest to date or coldest to date temperature. The simple average is presented along with the percentile intervals. When plotting

#126. Mixing Ratio / Vapor Pressure Deficit Climatology and Yearly Timeseries Plot


This plot presents one of two metrics indicating daily humidity levels as reported by a surface weather station. The first being mixing ratio, which is a measure of the amount

#84. MRMS Q3 / PRISM / IEM Reanalysis Estimated Precipitation (multiday summaries/departures too)


This application generates maps of precipitation daily or multi-day totals. There are currently three backend data sources made available to this plotting application: IEM Reanalysis A crude

#185. Number of Days to Accumulate an Amount of Precipitation (MRMS)


This application will make a map with the number of days it takes to accumulate a given amount of precipitation. This is based on progressing daily back in time for

#164. Percentage of NWS CLI Sites Reporting Daily Above/Below Temps or Precip/Snow


This chart presents a simple accounting of the percentage of first order NWS climate sites that are either above or below average or reporting precipitation / snow each day. Note

#22. Percentage of Years within Temperature Range from Averages


This plot displays the frequency of a daily high or low temperature being within a certain bounds of the long term NCEI climatology for the location.

#83. Period Averages or Totals of X days around a given day of the year


This plot compares a period of days prior to a specified date to the same number of days after a date. The specified date is not used in either statistical

#140. Period Statistics of Temp/Precip/Wind for a date period each year [ASOS/Automated Stations]


This plot presents statistics for a period of days each year provided your start date and number of days after that date. If your period crosses a year bounds, the

#107. Period Statistics of Temp/Precip for a date period each year [COOP/Climate Sites]


This plot presents statistics for a period of days each year provided your start date and number of days after that date. If your period crosses a year bounds, the

#182. Precipitation (MRMS) Coverage Efficiency by State


This application attempts to assess the effectiveness of a calendar day's rainfall based on where the rain fell in relation to a previous period of days departure from climatology. So

#43. Recent (Past 2-3 Days) Timeseries (Meteogram)


This plot presents a time series of observations. Please note the colors and axes labels used to denote which variable is which in the combination plots.

#157. Relative Humidity Max/Min/Avg by Day of Year


The IEM computes a daily maximum and minimum relative humidity value based on whatever observations were available for that calendar day. This app presents these values along with a simple

#62. Snow Depth


This chart presents the daily snow depth reports as a image. Each box represents an individual day's report with the color denoting the amount. Values in light gray are missing

#199. ISU Soil Moisture Network Daily Plots


This application generates maps of daily ISU Soil Moisture Network Data.

#38. Solar Radiation Estimates from NARR


This plot presents yearly estimates of daily solar radiation for the 'climodat' stations tracked by the IEM. These stations only report temperature, precipitation, and snowfall, but many users are interested

#25. Spread of Daily High and Low Temperatures


This plot displays the distribution of observed daily high and low temperatures for a given day and given state. The dataset is fit with a simple normal distribution based on

#137. Start Date of Spring/Fall with Statistics


This plot displays some metrics about the start date and duration of the spring or fall season. The definition of the season being the period between the coldest 91 day

#4. State Areal Coverage of Precip Intensity over X Days


Using the gridded IEM ReAnalysis of daily precipitation. This chart presents the areal coverage of some trailing number of days precipitation for a state of your choice. This application does

#89. State Areal Coverage/Efficiency of Precipitation


This is a complex plot to describe! For each 24 hour period (roughly ending 7 AM), the IEM computes a gridded precipitation estimate. This chart displays the daily coverage of

#81. Standard Deviation of Daily Temperatures


This chart presents two measures of temperature variability. The first is the standard deviation of the period of record for a given day of the year. The second is the

#28. Trailing Number of Days Precipitation Total Rank


This plot presents trailing day precipitation metrics. Each point on the x-axis represents a period from that date to the right-most date on the plot. There are five options for

#142. Trailing X Number of Days Temp/Precipitation Departures


This plot presents the trailing X number of days temperature or precipitation departure from long term average. You can express this departure either in Absolute Departure or as a Standard

#132. Top 10 Precip/Temperature Values by Month/Season


This plot displays the top ten events for a given site and period of your choice. Here is a description of the labels shown in the 'Which Metric to Summarize'

#190. Year of Daily High/Low Temperature Record


This chart presents the year that the present day climatology record resides.

Monthly

#130. Average High/Low Temperature with/without Snowcover


This chart displays the average high and low temperature by month for days with or without snowcover reported. There are a number of caveats due to the timing of the

#125. Climatological Maps of Annual/Monthly Averages


This application produces map analysis of climatological averages. The IEM maintains a number of different climatologies based on period of record and source. If you pick the NCEI Climatology, only

#1. Comparison of Multi-Month Totals/Averages


This app allows the arbitrary comparison of months against other months. When the period of months wraps around a new year, the app attempts to keep this situation straight with

#55. Daily Climatology Comparison


This plot displays a comparison of various daily temperature climatologies. The National Center for Environmental Information (NCEI) releases a 30 year climatology every ten years. This data is smoothed to

#17. Daily High/Low Temps with Climatology


Daily plot of observed high and low temperatures along with the daily climatology for the nearest (sometimes same) location. The vertical highlighted stripes on the plot are just the weekend

#129. Daily Observation Percentiles/Frequencies by Month


This chart plots the monthly percentiles that a given daily value has. For example, where would a daily 2 inch precipitation rank for each month of the year. Having a

#15. Daily Temperature Change Frequencies by Month


This plot displays the directional frequency of day to day changes in high or low temperature summarized by month.

#98. Day of Month Frequency of meeting temp/precip threshold


This plot produces the daily frequency of a given criterion being meet for a station and month of your choice.

#65. Day of the Month with the coldest/warmest temperature


This plot displays the frequency of a given day in the month having the coldest high or low temperature of that month for a year.

#161. Days per month/season above/below some threshold


This application plots the number of days for a given month or period of months that a given variable was above or below some threshold.

#29. Frequency of Hourly Temperature within Range by Month


This plot presents the frequency of a given hourly temperature being within the bounds of two temperature thresholds. The hour is specified in UTC (Coordinated Universal Time) and observations are

#116. Cooling/Heating Degree Days monthly totals


This chart presents monthly cooling degree days or heating degree days for a 20 year period of your choice. The 20 year limit is for plot usability only, the data

#42. Hourly Temperature Streaks Above/Below Threshold


Based on hourly or better METAR reports, this plot displays the longest periods above or below a given temperature threshold. There are plenty of caveats to this plot, including missing

#154. Hourly Temperature Averages by Month


This chart presents an average hourly value for a given month or season over the years covering the period of record for the site. For the year to plot, at

#85. Hourly Temperature Frequencies by Month


Based on IEM archives of METAR reports, this application produces the hourly frequency of a temperature at or above or below a temperature thresold.

#177. ISU Soil Moisture Network Timeseries Plots


This application generates a series of chart types for data from the ISU Soil Moisture Network.

#2. Month Precipitation vs Month Growing Degree Day Departures


This plot compares the growing degree day vs precipitation departure for a given month and station. The departure is expressed in units of standard deviation. So a value of one

#57. Monthly Precipitation/Temperature Records


This plot displays the record months for a statistic of your choice. The current month for the current day is not considered for the analysis.

#95. Monthly Precipitation/Temperature with El Nino Indices


This chart displays the combination of average temperature and total precipitation for one or more months of your choice. The dots are colorized based on the Southern Oscillation Index (SOI)

#24. Monthly Precipitation/Temperature Climate District Ranks/Arridity


The map presents IEM computed climate district ranks for a metric of your choice. This map can be generated for a given month and year or period of dates. If

#3. Monthly Precipitation/Temperature Statistics by Year


This plot displays a single month's worth of data over all of the years in the period of record. In most cases, you can access the raw data for these

#6. Monthly Precipitation/Temperature Distributions


This application plots out the distribution of some monthly metric for single month for all tracked sites within one state. The plot presents the distribution and normalized frequency for a

#8. Monthly Precipitation Reliability


This plot presents the frequency of having a month's preciptation at or above some threshold. This threshold is compared against the long term climatology for the site and month. This

#23. Monthly Station Departures + El Nino 3.4 Index


This plot presents the combination of monthly temperature or precipitation departures and El Nino index values.

#36. Month warmer than other Month for Year


This plot summarizes the frequency of one month being warmer than another month for that calendar year.

#58. One Day's Precipitation Greater than X percentage of Monthly Total


Displays the number of times that a single day's precipitation was greater than some portion of the monthly total. The default settings provide the frequency of getting half of the

#41. Quantile / Quantile Plot of Daily Temperatures for Two Months/Periods


This plot compares the distribution of daily temperatures for two months or periods for a single station of your choice. The left hand plot depicts a quantile - quantile plot,

#20. Hours of Precipitation by Month


This chart displays the number of hourly observations each month that reported measurable precipitation. Sites are able to report trace amounts, but those reports are not considered in hopes of

#47. Snowfall vs Precipitation Total for a Month


This chart displays the combination of liquid precipitation with snowfall totals for a given month. The liquid totals include the melted snow. So this plot does not show the combination

#39. Scenarios for this month besting some previous month


This plot compares the month to date average temperature of this month against any previous month of your choice. The plot then contains this month's to date average temperature along

#71. Wind Speed and Wind Direction Daily Averages for Month


This plot displays daily average wind speeds for a given year and month of your choice. These values are computed by the IEM using available observations. Some observation sites explicitly

#138. Wind Speed and Wind Direction Monthly Climatology


This graph presents monthly average wind speed values along with vector-averaged average wind direction.

#173. Wind Speed Hourly Climatology by Month or Period


This chart presents the hourly average wind speeds by month of the year or by custom periods. The hours presented are valid in the local time zone of the reporting

Yearly

#135. Accumulated Days with High/Low Above/Below Threshold


This plot displays the accumulated number of days that the high or low temperature was above or below some threshold.

#76. Avg Dew Point / Vapor Pressure Deficit by Year or Season


Simple plot of yearly average dew points by year, season, or month. This calculation was done by computing the mixing ratio, then averaging the mixing ratios by year, and then

#125. Climatological Maps of Annual/Monthly Averages


This application produces map analysis of climatological averages. The IEM maintains a number of different climatologies based on period of record and source. If you pick the NCEI Climatology, only

#151. Difference between two periods or single period of years [map]


This map produces an analysis yearly averages. You can either plot the difference between two period of years or simply the years between the first period. This app is meant

#187. Compare one station yearly summary vs entire state


This chart presents the rank a station's yearly summary value has against an unweighted population of available observations in the state. The green line is a simple average of the

#128. Comparison of Yearly Summaries between two stations


This chart compares yearly summaries between two long term climate sites.

#99. Daily High + Low Temperatures with Departures


This plot produces a time series difference between daily high and low temperatures against climatology. For this context, the climatology is the simple daily average based on period of record

#12. Days per year and first/latest date above/below given threshold


This plot presents the yearly first or last date of a given high or low temperature along with the number of days that year above/below the threshold along with the

#184. Days per year with High Temperature above temperature thresholds


This plot shows the number of days with a high temperature at or above a given threshold. You can optionally generate this plot for the year to date period.

#74. Days per year by season or year with temperature above/below threshold


The number of days for a given season that are either above or below some temperature threshold.

#181. Days per year with temp/precip/snowfall within ranges


This application plots frequencies of a variable of your choice for five bins of your choice. These five bins represent inclusive ranges and may overlap, if so desired. The range

#13. End/Start Date of Summer (warmest 91 day period) per Year


This chart presents the start or end date of the warmest 91 day period each year.

#27. First Fall Temp Below Threshold (First Freeze/Frost)


This chart presents the date of the first fall (date after 1 July) temperature below threshold 1 and then the number of days after that date until threshold 2 was

#165. First / Last Date of Temperature Threshold [map]


This app generates a map showing either an explicit year's first or last date or the given percentile (observed frequency) date over all available years of a given temperature threshold.

#119. Frequency of First Fall High/Low Temperature by Day of Year


This chart presents the accumulated frequency of having the first fall temperature at or below a given threshold.

#120. Frequency of Last Spring High/Low Temperature by Day of Year


This chart presents the accumulated frequency of having the last spring temperature at or below a given threshold.

#189. General yearly totals with trend line fitted


Create plots of yearly totals and optionally fit a linear trendline. Here is a brief description of some of the available metrics. Frost Free Days: Number of days each

#179. Growing Degree Day Scenarios For This Year


this application creates two 2-D histograms of GDD accumulation frequencies. These frequencies are based on historical data for the specificed site and base the end of each year's growing season

#152. Growing Season Differences Map between Two Periods


This map produces an analysis of change in the number of days for the growing season.

#148. Holiday or Same Day Daily Weather Observations each year


This plot presents a daily observation for a site and year on a given date / holiday date each year. A large caveat to this chart is that much of

#53. Hourly Frequency of Temperature within Certain Ranges


This plot is a histogram of observed temperatures placed into six range bins of your choice. The plot attempts to answer the question of how often is the air temperature

#10. Last Spring and First Fall Date above/below given threshold


This plot presents the period between the first or last date for spring and fall season that the temperature was above or below some threshold. The year is split into

#64. Last or First Snowfall of Each Winter Season


This chart displays either the first or last date of the winter season with a snowfall of a given intensity. The snowfall and snow depth data is not of great

#33. Maximum Low Temperature Drop


This plot presents the largest drop in low temperature during a fall season. The drop compares the lowest low previous to the date with the low for that date. For

#188. Max/Min High/Low after first temperature exceedence of season


This plot presents the yearly minimum temperature after the first spring temperature above a given value or the maximum temperature after the first fall temperature below a given value. The

#105. Maximum Period between Precipitation Amounts


This plot presents three precipitation metrics for a site of your choice. The upper plot displays the maximum period of days in between precip events of either greater than 0.01"

#46. Minimum Wind Chill Temperature


This chart presents the frequency of observed minimum wind chill for a winter season each year over the period of record for the observation site.

#30. Monthly Temperature Range


This chart presents the range between the warmest high temperature and the coldest low temperature for a given month for each year. The bottom panel displays the range between those

#44. NWS Office Accumulated SVR+TOR Warnings


This plot displays an accumulated total of office issued watch, warning, advisories. These totals are not official and based on IEM processing of NWS text warning data. The totals are

#69. Percentage of Days each Year Above Average


The frequency of days per year that the temperature was above average. Data is shown for the current year as well, so you should consider the representativity of that value

#77. Period between Last and First High Temperature for Year


For each year, the average first and last date of a given temperature is computed. The values are then averaged and plotted to represent the period between these occurences and

#134. Period each year that was warmest/coldest/wettest


This plot displays the period of consecutive days each year with the extreme criterion meet. In the case of a tie, the first period of the season is used for

#75. Precipitation Totals by Season/Year


Simple plot of seasonal/yearly precipitation totals.

#63. Records Set by Year (Max High / Min Low / Max Precip)


This chart plots the number of daily maximum high temperatures, minimum low temperatures and precipitation records set by year. Ties are not included. The algorithm sets the records based on

#144. Soil Temperature Periods Above/Below Threshold in Spring


This plot uses hourly 4 inch depth soil temperature observations from the ISU Soil Moisture Network. It first plots the first period each year that the soil temperature was at

#145. Soil Temperature / Moisture Daily Time Series by Year


This chart presents daily timeseries of soil temperature or moisture. The dataset contains merged information from the legacy Iowa State Ag Climate Network and present-day Iowa State Soil Moisture Network.

#175. Snow Coverage Percentage for State For One Winter


This chart displays estimated areal coverage of snow cover for a single state. This estimate is based on a 0.125x0.125 degree analysis of NWS COOP observations. The date shown would

#133. Snowfall Season Totals Split by Date within Season


This plot displays the total reported snowfall for a period prior to a given date and then after the date for the winter season. When you select a date to

#103. Step Ups in High Temp / Step Downs in Low Temp by Year


This plot analyzes the number of steps down in low temperature during the fall season and the number of steps up in high temperature during the spring season. These steps

#100. Temperature / Precipitation Statistics by Year


This plot displays a metric for each year. In most cases, you can access the raw data for these plots here.

#136. Time per Winter Season below Wind Chill Threshold


This plot displays the number of accumulated hours below a given wind chill temperature threshold by season. The labeled season shown is for the year of January. So the season

#104. Trailing X day temp/precip departures (weather cycling)


This plot presents the time series of trailing X number of day departures evaluated every Y days forward in time. The departures are expressed in terms of standard deviation (sigma)

#14. Yearly Precipitation Contributions by Daily Totals


Using long term data, five precipitation bins are constructed such that each bin contributes 20% to the annual precipitation total. Using these 5 bins, an individual year's worth of data

Hydrology / Drought Monitor Plots

#178. NWS RFC Flash Flood Guidance Plots


This application plots Flash Flood Guidance for a time of your choice. The time is used to query a 24 hour trailing window to find the most recent FFG issuance.

#183. US Drought Monitor Areal Coverage by State


This plot presents a time series of areal coverage of United States Drought Monitor for a given state of your choice. This plot uses a JSON data service provided by

#186. US Drought Monitor Change in Areal Coverage by State


This plot shows the weekly change in drought monitor intensity expressed in terms of category change over the area of the selected state. For example, an arrow of length one

#194. US Drought Monitor Time Duration over Period Maps


This application generates a heatmap of the frequency of a given drought classification. The classification is the minimal threshold, so if a location is in D3 classification drought, it would

#193. US Drought Monitor + Weather Prediction Center Forecasted Rain


Generates a map of WPC Quantitative Precipitation Forecast (QPF) and most recent US Drought Monitor to the date choosen to plot the WPC forecast.

METAR ASOS Special Plots

#78. Average Dew Point/RH% by Air Temperature by Month or Season or Year


This plot displays the average dew point at a given air temperature. The average dew point is computed by taking the observations of mixing ratio, averaging those, and then back

#79. Average Dew Point by Wind Direction by Month or Season or Year


This plot displays the average dew point at a given wind direction. The average dew point is computed by taking the observations of mixing ratio, averaging those, and then back

#40. Cloud Amount and Level Timeseries / Visibility for One Month


This chart is an attempted illustration of the amount of cloudiness that existed at a METAR site for a given month. The chart combines reports of cloud amount and level

#88. Cloudiness Impact on Hourly Temperatures


This plot attempts to show the impact of cloudiness on temperatures. The plot shows a simple difference between the average temperature during cloudy/mostly cloudy conditions and the average temperature by

#59. Daily u and vs Wind Component Climatologies


This plot presents a climatology of wind observations. The top panel presents the u (east/west) and v (north/south) components. The bottom panel is the simple average of the wind speed

#54. Difference between morning low or afternoon high temperature between two sites


This application plots the difference in morning low or afternoon high temperature between two sites of your choice. The morning is defined as the period between midnight and 8 AM

#167. Flight / Aviation Condition (VFR, MVFR, IFR, LIFR) hourly for one month


This chart summarizes Flight Category by hour and day of a given month. In the case of multiple observations for a given hour, the worst category is plotted.

#87. Frequency of METAR Code (Thunder, etc) by week or day by hour


Frequency plot partitioned by hour and day or week of the year for a given METAR code to appear in the present weather. If your favorite METAR code is not

#131. Frequency of Overcast Clouds / Clear Skies by Air Temperature by month/season


This plot displays the frequency of having overcast conditions reported by air temperature. More specifically, this script looks for the report of 'OVC' within the METAR sky conditions. Many caveats

#93. Heat Index / Temperature / Dew Point / Wind Chill Hourly Histogram


Caution: This plot takes a bit of time to generate. This plot displays a histogram of hourly heat index values or temperature or dew point or wind chill. The connecting

#192. Hourly Analysis Maps of ASOS/AWOS/METAR Stations


Generates analysis maps of ASOS/AWOS station data.

#153. Hourly Temperature Extremes by Month/Season/Year


This table presents the extreme hourly value of some variable of your choice based on available observations maintained by the IEM. Sadly, this app will likely point out some bad

#159. Hourly Temp/Dew Point Frequency by-year by-hour-of-day


Based on available hourly observation reports by METAR stations, this application presents the frequency of number of hours for a given month or season at a given threshold.

#106. Hourly temp distributions on days exceeding temperature


This plot displays hourly temperature distributions for a given time period and temperature threshold of your choice. The temperature threshold is for one or more exceedences for the day.

#202. Hourly variable comparison between two hours on one day


This application presents daily comparisons of an automation station's hourly data. You pick two hours of your choice and the application will compute the difference between the two. The hours

#169. Largest Rise/Drop in Temperature over X Hours


This chart presents the largest changes in temperature over a given number of hours. This is based on available hourly temperature reports. It also requires an exact match in time

#18. Long term observation time series


This chart displays a simple time series of an observed variable for a location of your choice. For sites in the US, the daily high and low temperature climatology is

#45. Monthly Frequency of Overcast Conditions


Computes the frequency of having a day within a month with an overcast sky reported at a given time of the day. There are a number of caveats to this

#170. Monthly Frequency of Present Weather Code in METAR Report


This chart totals the number of distinct calendar days per month that a given present weather condition is reported within the METAR data feed. The calendar day is computed for

#67. Monthly Frequency of Wind Speeds by Air Temperature


This plot displays the frequency of having a reported wind speed be above a given threshold by reported temperature and by month.

#37. MOS Forecasted Temperature Ranges + Observations


This chart displays the combination of Model Output Statistics (MOS) forecasts and actual observations by the automated station the MOS forecast is for. MOS is forecasting high and low temperatures

#162. Overcast Sky Condition 2D Histogram (Level by Week)


This plot presents a 2-D histogram of overcast conditions reported by the automated sensor. Please note that the yaxis uses an irregular spacing.

#146. Temperature Frequency by Week During Precipitation


This chart displays the frequency of having measurable precipitation reported by an ASOS site and the air temperature that was reported at the same time. This chart makes an assumption

#155. Top Ten Hourly Reports from ASOS Stations


Based on available hourly observation reports by METAR stations, this application presents the top 10 events for a given metric of your choice. Please note that this application often reveals

#16. Wind Rose when specified criterion is meet


This application generates a wind rose for a given criterion being meet. A wind rose plot is a convenient way of summarizing wind speed and direction.

NASS Quickstats (USDA Crop Statistics)

#156. Crop Condition by Year for Six States


This chart presents crop condition reports.

#127. Crop Progress by Year


This chart presents the crop progress by year. The most recent value for the current year is denoted on each of the previous years on record.

#209. Crop Progress Weekly Change


This plot presents the weekly change in a given USDA NASS Crop Progress report variable.

NWS Warning Plots

#196. ASOS/METAR Heat Index / Wind Chill Frequencies by NWS Alert Headline


This plot presents a frequency of having either a heat index or wind chill advisory/warning active for a given computed feels like temperature. The major caveat with this plot is

#191. Calendar Plot of Watch/Warn/Adv Daily Counts by WFO


This application presents a calendar of daily counts of the number of watch, warning, advisories issued by day. This accounting is based on the initial issuance date of a given

#92. Days since Last Watch/Warning/Advisory by WFO


This map depicts the number of days since a Weather Forecast Office has issued a given VTEC product. You can set the plot to a retroactive date, which computes the

#72. Frequency of Watch/Warning/Advisories by Time of Day


This chart presents a histogram of the Watch, Warning, Advisory valid time. This is the time period between the issuance and final expiration time of a given event. An individual

#50. Frequency of Hail/Wind Tags used in Severe TStorm Warnings


This app produces a table of frequencies of wind and hail tags used in NWS Warnings.

#52. Gantt Chart of WFO Issued Watch/Warning/Advisories


Gantt chart of watch, warning, and advisories issued by an NWS Forecast Office for a start date and number of days of your choice. The duration of the individual alert

#163. Local Storm Reports Issued by WFO/State [map]


This application generates a map displaying the number of LSRs issued between a period of your choice by NWS Office. These are the preliminary reports and not official totals of

#102. Local Storm Report Source Type Ranks by Year


The National Weather Service issues Local Storm Reports (LSRs) with a label associated with each report indicating the source of the report. This plot summarizes the number of reports received

#44. NWS Office Accumulated Watch/Warning/Advisories by Year


This plot displays an accumulated total of office issued watch, warning, advisories. These totals are not official and based on IEM processing of NWS text warning data. The totals are

#68. Number of Distinct Phenomena/Significance VTEC per Year


This chart shows the number of VTEC phenomena and significance combinations issued by a NWS Forecast Office for a given year. Please note that not all current-day VTEC products were

#73. Number of Watch/Warning/Advisories Issued per Year


This chart displays the number of products issued by a NWS Office by year for a given watch, warning, or advisory of your choice. These numbers are based on IEM

#171. Number of Watch/Warning/Advisories Issued per Year per Month


This chart displays the monthly number of distinct NWS Office issued watch / warning / advisory product. For example, a single watch for a dozen counties would only count 1

#70. Period between First and Last VTEC Product Each Year


This chart shows the period between the first and last watch, warning, advisory (WWA) issued by an office per year. The right hand chart displays the number of unique WWA

#203. Storm Based Warning Polygon Visual Summary


This application generates a visual summary of polygons issued for a given UTC date.

#195. Storm Motion distribution based on NWS Warnings


Some of the warnings that the National Weather Service issues includes a storm motion vector. This application plots the speed vs direction of the vector and includes a kernel density

#201. Storm Prediction Center (SPC) Convective Outlook Calendar


This application presents a calendar of Storm Prediction Center outlooks by state, WFO, or county. The GIS spatial operation done is a simple touches. So an individual outlook that just

#200. Storm Prediction Center (SPC) Convective Outlook Heatmap


This application generates heatmaps of Storm Prediction Center convective outlooks. Major Caveat: Due to how the IEM stores the outlook geometries, the values presented here are for an outlook level

#166. Storm Prediction Center (SPC) Watches per Year for a State


This plot presents a summary of the number of year to date watches issued by the Storm Prediction Center and the percentage of those watches that at least touched the

#210. Text Product Frequency Maps


This application generates a map of the per WFO office usage of a given text product identifier based on unofficial IEM archives of NWS Text Product data. The three character

#48. Time of Day Frequency for Given Warning / UGC


For a given watch/warning/advisory type and forecast zone, what is the frequency by time of day that the product was valid. The total number of events for the county/zone is

#80. Time Duration of a Watch/Warning/Advisory for a UGC


This plot presents the accumulated frequency of duration for a given NWS VTEC Watch, Warning, Advisory product.

#101. Top 25 Most Frequent VTEC Products by Office/NWS


This chart displays the relative frequency of VTEC products. This is computed by taking the unique combination of events and UGC county/zones. Restating and for example, a single Severe Thunderstorm

#56. Weekly Frequency of a Watch/Warning/Advisory


This chart shows the weekly frequency of having at least one watch/warning/advisory (WWA) issued by the Weather Forecast Office (top plot) and the overall number of WWA issued for that

#109. WFO VTEC Event Counts/Time Coverage Percent/Num Days for a Given Period (map)


This application generates per WFO maps of VTEC event counts. The current three available metrics are: Event Count: The number of distinct VTEC events. A distinct event is

#208. WFO VTEC Single Event Map Plot (map)


This application generates a map showing the coverage of a given VTEC alert for a given office. The tricky part here is how time is handled for events whereby zones/counties

Tall Towers Plots

#158. Tall Towers - 1 Second Interval Time Series


This plot presents one second data from the Iowa Atmospheric Observatory Tall-Towers sites overseen by Dr Gene Takle. The plot limits the number of times plotted to approximately 1,000 so

Upper Air / RAOB Sounding Plots

#198. Monthly Max/Min/Avgs for Sounding Parameter or Variable at Given Level


This plot presents a simple average of a given sounding variable of your choice. If the selected month period crosses a calendar year, the year shown is for the January

#150. Single Sounding Mandatory Level Percentile Ranks


This plot presents percentiles of observations from a given sounding profile against the long term record for the site. These percentiles are computed against all other soundings for the valid