FNUS73 KOAX 201256 FWSOAX Spot Forecast for Percival I-29 WMA...Iowa DNR National Weather Service Omaha/Valley NE 756 AM CDT Mon Apr 20 2026 Forecast is based on ignition time of 0800 CDT on April 20. If conditions become unrepresentative, contact the National Weather Service. .DISCUSSION... Moderate to High fire danger is expected today. Minimum relative humidities will fall to 25 to 30 percent late this afternoon and evening, with winds out of the south/southwest at speeds of 10 to 15 kts and gusting as high as 20 to 25 kts at times. Temperatures will warm into the low to mid 70s this afternoon. Strongest Possible 30 ft Wind Speeds on Day of Burn: 30 kts Lowest Possible Relative Humidity on Day of Burn: 20 percent .REST OF TODAY... Sky/weather.........Sunny (0-10 percent). Temperature.........44 at ignition...Max 76. RH..................60 percent at ignition...Min 26 percent. Eye level winds.....South winds 6 to 10 mph with gusts to around 14 mph shifting to the around 10 mph with gusts to around 14 mph late in the afternoon. Wind (30 ft)........South winds 10 to 16 mph with gusts to around 24 mph shifting to the around 16 mph with gusts to around 24 mph late in the afternoon. Wind (20 ft)........Winds southeast at 8 mph at ignition...otherwise Southeast winds 9 to 14 mph with gusts to around 19 mph shifting to the south with gusts to around 19 mph late in the afternoon. Mixing height.......800 ft AGL at ignition...otherwise 4600 ft AGL. Transport winds.....South 16 to 21 mph. Smoke dispersal.....Fair /15100 knot-ft/ at ignition. Max...excellent /79800 knot-ft/. GFDI................4. TIME (CDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........6 5 3 2 5 3 1 2 1 6 Weather cov..... Weather type.... Tstm cov........ Temp............44 47 51 56 60 66 70 73 75 76 RH..............60 56 52 49 44 37 31 29 27 26 20 ft wind dir..SE SE SE SE SE SE S S S S 20 ft wind spd..8 9 11 12 12 12 13 13 12 13 20 ft wind gust.14 16 17 17 17 18 18 19 19 19 Eye lvl wnd dir.SE SE SE SE SE SE S S S S Eye lvl wnd spd.6 7 8 9 9 9 10 10 9 10 Eye lvl wnd gst.10 12 13 13 13 13 14 14 14 14 30 ft wnd dir...SE SE SE SE SE SE S S S S 30 ft wnd spd...10 11 14 15 15 15 16 16 15 16 30 ft wnd gst...17 20 21 21 21 22 23 24 24 24 Mix hgt (kft)...0.8 1.4 1.7 2.1 2.6 3.0 3.7 4.0 4.4 4.6 Transp wind dir.SE SE SE S S S S S S S Transp wind spd.17 21 21 17 16 16 17 18 21 21 GFDI............1 1 2 2 3 4 5 6 6 6 SDspl kt-ft/100015 23 30 34 37 43 59 74 80 62 .TONIGHT... Sky/weather.........Partly cloudy (20-30 percent). Temperature.........Min 54. RH..................Max 80 percent. Eye level winds.....South winds 7 to 10 mph with gusts to around 14 mph. Wind (30 ft)........South winds 11 to 16 mph with gusts to around 24 mph. Wind (20 ft)........South winds 10 to 14 mph with gusts to around 19 mph. Mixing height.......600 ft AGL. Transport winds.....South 16 to 23 mph. Smoke dispersal.....Good (34500 knot-ft) early in the evening decreasing to poor (7700 knot-ft) late in the night. GFDI................4. TIME (CDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM Sky (%).........3 21 1221 24 39 31 42 48 29 18 24 Weather cov..... Weather type.... Tstm cov........ Temp............76 74 70 66 64 62 61 60 59 58 56 56 RH..............26 29 35 42 46 50 51 53 57 62 72 72 20 ft wind dir..S S S S S S S S S S S S 20 ft wind spd..12 12 11 11 12 13 12 12 12 11 11 9 20 ft wind gust.19 18 17 18 18 19 19 19 18 18 17 16 Eye lvl wnd dir.S S S S S S S S S S S S Eye lvl wnd spd.9 9 8 8 9 10 9 9 9 8 8 7 Eye lvl wnd gst.14 13 13 13 14 14 14 14 14 14 13 12 30 ft wnd dir...S S S S S S S S S S S S 30 ft wnd spd...15 15 14 14 15 16 15 15 15 14 14 11 30 ft wnd gst...24 22 21 22 23 24 24 24 23 23 21 20 Mix hgt (kft)...4.6 0.8 0.6 0.7 0.8 0.8 0.8 0.7 0.7 0.8 0.7 0.7 Transp wind dir.S S S S S S S S SW SW S S Transp wind spd.23 16 17 20 22 21 21 21 20 20 18 17 GFDI............6 5 4 3 3 3 3 3 3 2 2 1 SDspl kt-ft/100035 12 8 11 15 15 14 13 12 12 11 8 .TUESDAY... Sky/weather.........Sunny (0-10 percent). Temperature.........Max 84. RH..................Min 33 percent. Eye level winds.....Southwest winds up to 7 mph. Wind (30 ft)........Southwest winds 8 to 11 mph. Wind (20 ft)........Southwest winds 7 to 10 mph. Mixing height.......5100 ft AGL. Transport winds.....Southwest 14 to 21 mph decreasing to 10 to 12 mph in the afternoon. Smoke dispersal.....Poor (5600 knot-ft) early in the morning increasing to good (50700 knot-ft) in the afternoon. GFDI................2. TIME (CDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........8 7 9 7 4 4 3 3 3 3 3 4 Weather cov..... Weather type.... Tstm cov........ Temp............55 54 57 61 67 72 76 79 81 83 84 84 RH..............77 80 80 75 63 55 46 42 38 36 33 33 20 ft wind dir..S S S SW SW SW SW SW SW SW SW SW 20 ft wind spd..8 8 8 8 9 9 8 8 8 7 7 6 20 ft wind gust.14 13 13 13 14 14 13 13 13 12 12 11 Eye lvl wnd dir.S S S SW SW SW SW SW SW SW SW SW Eye lvl wnd spd.6 6 6 6 7 7 6 6 6 5 5 4 Eye lvl wnd gst.10 10 10 10 10 10 10 10 10 9 9 8 30 ft wnd dir...S S S SW SW SW SW SW SW SW SW SW 30 ft wnd spd...10 10 10 10 11 11 10 10 10 9 9 8 30 ft wnd gst...17 16 16 16 17 17 16 16 16 15 15 14 Mix hgt (kft)...0.6 0.6 1.0 1.7 2.3 2.7 3.2 3.7 4.3 4.8 5.1 4.7 Transp wind dir.S S SW SW SW SW SW W SW SW SW SW Transp wind spd.15 14 17 21 21 18 14 12 12 12 12 10 GFDI............1 1 1 1 2 2 2 2 3 2 3 2 SDspl kt-ft/10006 7 18 30 41 41 39 37 43 49 51 43 .FORECAST DAYS 3 THROUGH 5... .WEDNESDAY... Mostly clear. Lows in the mid 50s. Highs around 80. South winds around 10 mph. .THURSDAY... Mostly cloudy with showers likely and chance of thunderstorms. Lows in the lower 60s. Highs around 80. South winds around 18 mph. .FRIDAY... Cooler. Partly cloudy. Chance of showers and slight chance of thunderstorms. Lows in the mid 40s. Highs in the mid 60s. Northwest winds around 12 mph. $$ Forecaster...KG Requested by...Matt Dollison Type of request...PRESCRIBED .TAG 2610841.0/OAX .DELDT 04/20/26 .FormatterVersion 2.0.0 .EMAIL matt.dollison@dnr.iowa.govOAX-222420