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Suppression Forecast
Issued by NWS St. Louis, MO
Issued by NWS St. Louis, MO
104 FNUS73 KLSX 280119 FWSLSX Spot Forecast for Horn Prairie Grove LWR...IL DNR National Weather Service Saint Louis MO 719 PM CST Thu Feb 27 2025 Forecast is based on ignition time of 1200 CST on February 28. If conditions become unrepresentative, contact the National Weather Service. .DISCUSSION... Widespread elevated fire weather conditions are expected on Friday due to gusty southwest winds, low humidity, and dry vegetation. Southwest winds will increase and become quite gusty by mid-morning. The wind will remain strong and gusty through the afternoon veering to more westerly. Short term fuels will dry rather quickly during the morning. Winds will diminish some in the evening and shift to the northwest as a cold front moves through. .FRIDAY... Sky/weather.........Sunny (5-15 percent). Chance of pcpn......0 percent. Temperature.........60 at ignition...Max 64. RH..................35 percent at ignition...Min 28 percent. Wind (20 ft)........Winds southwest at 20 mph at ignition...becoming westerly around 20 mph during the afternoon and then decreasing to 15 to 18 mph late in the afternoon. Gusts up to 37 mph. Eye level winds.....Winds southwest at 8 mph at ignition... becoming westerly around 8 mph during the afternoon and then decreasing to 6 to 7 mph late in the afternoon. Gusts to 15 mph. Using a 0.4 adjustment factor. Mixing height.......2800 ft AGL at ignition...otherwise max 4900 ft AGL. Transport winds.....West 30 to 36 mph decreasing to around 21 mph late in the afternoon. Smoke dispersal.....Good /12990 m/s-m/ at ignition. Max...excellent /23130 m/s-m/ decreasing to poor (4460 m/s-m) late in the afternoon. TIME (CST) NOON 2 PM 4 PM 6 PM 8 PM 10 PM Sky (%).........9 1 12 21 20 10 Weather cov..... Weather type....NONE NONE NONE NONE NONE NONE Tstm cov........ CWR.............0 0 0 0 0 0 Temp............60 64 61 54 50 46 RH..............35 29 31 41 48 56 20 ft wind......SW 20 W 20 W 18 W 10 NW 11 NW 11 20 ft wind gust.32 31 27 19 24 20 Eye level wind..SW 9 W 9 W 8 W 5 NW 5 NW 5 Eye lvl wnd gst.15 14 12 9 11 9 Mix hgt (kft)...2.8 4.3 4.0 0.7 0.7 0.9 Transport wind..SW 35 W 35 W 30 W 18 NW 17 NW 18 Vrate kt-ft/1K..83 128 103 11 11 15 Ventrate Cat....GOOD VYGD VYGD POOR POOR POOR .FRIDAY NIGHT... Sky/weather.........Mostly clear (10-20 percent). Chance of pcpn......0 percent. Temperature.........Min 31. RH..................Max 65 percent. Wind (20 ft)........Northwest winds 9 to 11 mph with gusts to around 24 mph. Eye level winds.....Northwest 4 to 5 mph with gusts to 10 mph using a 0.4 adjustment factor. Mixing height.......Min 700 ft AGL. Transport winds.....Northwest 17 to 21 mph shifting to the north around 18 mph after 3 am. Smoke dispersal.....Poor (1670 m/s-m). $$ Forecaster...Glass Requested by...Sami Childerson Type of request...PRESCRIBED .TAG 2504309.0/LSX .DELDT 02/27/25 .FormatterVersion 2.0.0