The precipitation total for this November has already exceeded the total for all of October for Ames. The featured chart presents the difference in precipitation between October and November each year for Ames. 37 of the total 119 years have seen a wetter November than October, so having this happen is about an one in three years chance. There are only small rainfall chances in the forecast.

Voting:
Good = 11
Bad = 1

Tags:   nov11   nov  

High temperatures on Sunday soared well into the 60s and approached 70 degrees in some locations. The featured chart presents the number of days for the past 31 years that the high was above either 60 or 70 degrees for November at Ames. This year has seen two days over 60 with none over 70 for Ames. Our recent history shows that days over 70 in November were rare in the 80s and 90s. Highs this week are expected to continue in the 60s as our nice fall season rolls on.

Voting:
Good = 23
Bad = 1

Tags:   nov  

The featured chart displays the minimum observed temperature in the state for the month of November. This November's minimum was a mere 17 degrees recorded at Atlantic and is the warmest minimum on record as shown by the chart. Low temperatures this morning to start off December are on the mild side mostly above freezing. Colder weather will arrive tomorrow.

Voting:
Good = 17
Bad = 9

Tags:   nov   nov09  

The featured chart is a plot of observed daily high and low temperatures for Ames during November from this year and all previous recorded years. The plot shows how variable the weather in November can be with highs from the teens to near 80. The red dots, signifying this year, appear mostly on the upper end of the chart with only one day having a high temperature below 40. Temperatures today will finish out November on the mild side as well with highs near 50.

Voting:
Good = 23
Bad = 11

Tags:   nov  

High temperatures today will be around 30 degrees colder than Tuesday. How often does this happen? The featured image displays the next day temperature change after a day in late November (after the 20th) which had a high temperature over 60 degrees. So for each temperature over 60 degrees, the range of temperature change for the next day is displayed. The overall mean change is around 10 degrees with a 30 degree change rather uncommon (~5% quantile).

Voting:
Good = 16
Bad = 9

Tags:   nov  

The featured plot is of observed afternoon air temperatures versus the direction of the wind for hourly observations during November back to 1970 when the wind speed was greater than 3 knots from the Des Moines Airport. Confused yet? The black line is a fit by wind direction and the contours are quantile densities, which indicate areas with large number of clustered observations. The plot confirms what we expect with cooler temperatures when the wind is from the Northwest (values 300-360) and warmer when the wind is from the Southwest (values 170-220). The two concentrated areas can be infered from a histogram plot of temperatures observed for 22 Nov with two modes of high temperatures due mostly to these two dominate wind regimes.

Voting:
Good = 40
Bad = 19

Tags:   nov