FNUS73 KDMX 201334 FWSDMX Spot Forecast for Peterson Park...Story County Conservation National Weather Service Des Moines IA 834 AM CDT Mon Apr 20 2026 Forecast is based on ignition time of 0900 CDT on April 20. 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... Sunny skies are expected today, with winds out of the south- southeast turning breezy, gusting to 20-25 mph and isolated to 30 mph on occasion. Minimum RH values will fall into the low to mid 30s into the afternoon. .REST OF TODAY... Sky/weather.........Sunny (5-15 percent). Max temperature.....Around 65. Min humidity........31 percent. Wind (20 ft)........South winds 9 to 16 mph. Mixing height.......3900 ft AGL. Transport winds.....South 16 to 23 mph. Smoke dispersal.....Poor (18400 knot-ft) early in the morning increasing to good (77700 knot-ft) in the afternoon. GFDI................3. TIME (CDT) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........4 2 2 2 2 4 8 8 15 Weather cov..... Weather type.... Tstm cov........ Temp............42 46 50 54 57 61 63 64 65 RH..............57 49 42 36 34 32 31 33 34 20 FT wind dir..SE SE S SE SE S S S S 20 FT wind spd..9 12 13 13 14 15 16 16 16 20 FT wind gust.17 20 20 20 21 23 23 24 24 Mix hgt (kft)...1.3 1.9 2.5 2.8 3.0 3.3 3.4 3.9 3.9 Transp wind dir.S S S S S S S S S Transp wind spd.16 18 18 18 18 20 20 21 23 GFDI............1 2 2 3 3 4 4 4 5 Smoke Dispersal.18 31 41 44 47 56 58 70 78 Smoke Cat.......PR PR FR FR FR FR FR GD GD .TONIGHT... Sky/weather.........Mostly clear (15-25 percent) then becoming mostly cloudy (55-65 percent). Min temperature.....Around 51. Max humidity........71 percent. Wind (20 ft)........South winds 12 to 16 mph. Mixing height.......600 ft AGL. Transport winds.....South 15 to 24 mph. Smoke dispersal.....Good (80500 knot-ft) early in the evening decreasing to poor (8200 knot-ft) late in the night. GFDI................3. TIME (CDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM Sky (%).........16 25 18 15 26 23 59 62 48 38 28 29 Weather cov..... Weather type.... Tstm cov........ Temp............65 64 61 58 56 56 55 55 54 54 53 53 RH..............35 40 46 55 62 64 66 66 71 71 71 71 20 FT wind dir..S S S S S S S S S S S S 20 FT wind spd..16 14 12 12 12 12 12 14 14 13 12 12 20 FT wind gust.24 25 18 21 22 21 20 21 20 20 20 17 Mix hgt (kft)...3.8 0.9 0.6 0.6 0.7 0.6 0.7 0.7 0.7 0.7 0.8 0.7 Transp wind dir.S S S S S S S SW SW SW SW SW Transp wind spd.24 17 15 17 20 20 21 20 18 18 17 15 GFDI............4 3 3 2 2 2 2 2 2 1 1 1 Smoke Dispersal.81 14 8 9 11 11 12 12 11 11 11 9 Smoke Cat.......GD PR PR PR PR PR PR PR PR PR PR PR .TUESDAY... Sky/weather.........Sunny (10-20 percent). Max temperature.....Around 81. Min humidity........33 percent. Wind (20 ft)........Southwest winds around 10 mph shifting to the northwest 6 to 8 mph late in the afternoon. Mixing height.......4900 ft AGL. Transport winds.....Southwest9 to 18 mph shifting to the west 6 to 8 mph late in the afternoon. Smoke dispersal.....Poor (6900 knot-ft) early in the morning increasing to fair (41300 knot-ft) in the afternoon. GFDI................2. TIME (CDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........22 10 12 9 5 8 11 14 11 9 6 6 Weather cov..... Weather type.... Tstm cov........ Temp............52 51 55 59 64 69 73 76 78 80 80 81 RH..............74 80 74 69 63 55 48 43 39 35 34 33 20 FT wind dir..S S SW SW SW W W W W W W NW 20 FT wind spd..10 10 10 10 10 10 9 9 8 8 7 6 20 FT wind gust.16 15 15 15 14 14 13 13 13 12 10 9 Mix hgt (kft)...0.6 0.6 1.0 1.7 2.3 2.9 3.4 3.9 4.5 4.9 4.7 3.4 Transp wind dir.SW SW SW SW W W W W W W W W Transp wind spd.14 14 15 17 18 16 13 9 8 8 7 6 GFDI............1 1 1 1 1 2 2 2 2 2 2 1 Smoke Dispersal.8 7 14 25 37 41 38 31 31 31 28 18 Smoke Cat.......PR PR PR PR PR FR PR PR PR PR PR PR $$ Forecaster...Bury Requested by...Brandon Clough Type of request...PRESCRIBED .TAG 2610865.0/DMX .DELDT 04/20/26 .FormatterVersion 2.0.0 .EMAIL bclough@storycountyiowa.gov