432 FNUS73 KDMX 150854 FWSDMX Spot Forecast for Lee Trail Pasture...Iowa DNR National Weather Service Des Moines IA 354 AM CDT Thu Mar 15 2018 Forecast is based on ignition time of 0700 CDT on March 15. If conditions become unrepresentative...contact the National Weather Service. An initial observation at ignition and a mid burn observation are required. Please relay them to the National Weather Service for each prescribed burn. .DISCUSSION... Elevated fire danger will prevail today over the west central and southwest part of our forecast area. This is an area where minimum relative humidity will in the 30 percent range combined with winds from the east sustained at 10 to 20 mph with gusts toward 30 mph by this afternoon. Minimum RH values will be higher over northern Iowa ranging from 50 to 60 percent. Relative humidities will recovery to above 60 percent in all areas. .REST OF TODAY... Sky/weather.........Sunny (20-30 percent). Max temperature.....Around 59. Min humidity........37 percent. Wind (20 ft)........East winds 6 to 14 mph. Mixing height.......300-2100 ft AGL increasing to 2300-2800 ft AGL early in the afternoon. Transport winds.....East 6 to 14 mph increasing to 16 to 22 mph late in the afternoon. Haines Index........4 or low potential for large plume dominated fire growth. TIME (CDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........2 4 5 11 17 19 26 28 32 31 45 Weather cov..... Weather type.... Tstm cov........ Temp............36 38 41 43 48 52 56 58 59 59 57 RH..............67 67 62 62 54 46 42 39 37 37 38 20 FT wind dir..NE E E E E E E E E E E 20 FT wind spd..6 6 7 8 9 10 10 12 13 14 14 20 FT wind gust. 12 13 13 15 20 21 22 Mix hgt (kft)...0.3 0.3 0.3 0.3 0.9 1.5 2.1 2.3 2.6 2.8 2.6 Transp wind dir.NE E E E E E E E E E E Transp wind spd.6 7 8 9 10 10 12 14 16 18 22 Haines index....4 4 4 4 4 4 4 4 4 4 4 .TONIGHT... Sky/weather.........Partly cloudy (45-55 percent) then becoming mostly cloudy (70-80 percent). Rain after midnight. Min temperature.....Around 35. Max humidity........89 percent. Wind (20 ft)........East winds 13 to 20 mph. Gusts up to 32 mph increasing to 35 mph early in the morning. Mixing height.......1000-2300 ft AGL. Transport winds.....East 21 to 29 mph. Haines Index........2 to 3 or very low potential for large plume dominated fire growth. TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM Sky (%).........50 79 84 81 81 84 Weather cov..... CHANCE DEFNTE Weather type....NONE NONE NONE NONE RAIN RAIN Tstm cov........ Temp............55 50 46 44 42 40 RH..............41 46 51 55 60 67 20 ft wind......E 14 E 13 E 14 E 16 E 17 E 20 20 ft wind gust.23 24 25 29 32 35 Mix hgt (ft)....2300 1700 1000 1000 1000 1000 Transport wind..E 24 E 24 E 21 E 21 E 23 E 25 Haines index....3 3 3 2 2 2 .FRIDAY... Sky/weather.........Cloudy (90-100 percent). Rain until late afternoon, then rain likely late in the afternoon. Max temperature.....Around 42. Min humidity........67 percent. Wind (20 ft)........East winds 17 to 21 mph with gusts to around 36 mph. Mixing height.......300-1900 ft AGL. Transport winds.....East 26 to 35 mph. Haines Index........2 or very low potential for large plume dominated fire growth. TIME (CDT) 6 AM 9 AM NOON 3 PM Sky (%).........90 97 96 95 Weather cov.....DEFNTE DEFNTE DEFNTE DEFNTE Weather type....RAIN RAIN RAIN RAIN Tstm cov........ Temp............36 35 36 41 RH..............75 89 85 73 20 FT wind......E 20G36 E 21G35 E 21G33 E 20G33 Mix hgt (ft)....1200 600 1300 1900 Transport wind..E 32 E 31 E 26 E 30 Haines index....2 2 2 2 $$ Forecaster...Ansorge Requested by...Heath Van Waus Type of request...PRESCRIBED .TAG 1804111.0/DMX .EMAIL Heath.Vanwaus@dnr.iowa.gov