####018004721#### FNUS73 KMPX 250909 FWSMPX Spot Forecast for Willow River SP Rx Burn...WI DNR National Weather Service Twin Cities/Chanhassen MN 409 AM CDT Thu Apr 25 2024 Forecast is based on ignition time of 1100 CDT on April 25. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. Please contact our office if you have questions or concerns with this forecast. .DISCUSSION...For the Willow River SP Rx Burn, skies will be mostly sunny today with a few high clouds moving through from southwest to northeast this afternoon. This will allow highs today to be in the mid to upper 60s. Dry conditions are expected, with relative humidity values forecasted to be in the 40s this morning before dropping into the mid-low 30s by the afternoon. South- southeasterly winds will gradually increase throughout the day, reaching 13-18 mph sustained by this evening. .REST OF TODAY... Sky/weather.........Sunny (10-20 percent). Temperature.........57 at ignition...Max 64. RH..................42 percent at ignition...Min 32 percent. Wind (20 ft)........Winds south at 12 mph at ignition...otherwise Southeast winds 12 to 15 mph. Smoke dispersal.....Good /37900 knot-ft/ at ignition. Max...excellent /96400 knot-ft/. Mixing height.......2400 ft AGL at ignition...otherwise 5500 ft AGL. Transport winds.....South 18 to 22 mph. Haines Index........5 or moderate potential for large plume dominated fire growth at ignition...max 5. TIME (CDT) 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM 7PM 8PM 9PM 10P Sky cover.......MCR MCR MCR MCR MCR MCR MCR MCR MCR MCR MCR MCR Weather cov..... Weather type.... Tstm cov........ Temp............57 60 62 63 64 64 64 63 62 59 55 53 RH..............42 39 35 34 32 34 34 35 36 37 43 46 20 FT wind dir..S SE SE SE SE SE SE SE SE SE SE SE 20 FT wind spd..12 14 15 15 15 15 15 14 14 14 14 15 20 FT wind gust.20 20 21 22 23 23 22 21 21 22 22 24 Mix hgt (kft)...2.4 4.0 5.0 5.4 5.5 5.2 4.9 4.4 2.0 0.8 0.7 0.6 Transp wind dir.S S S S S S SE SE SE SE SE SE Transp wind spd.18 20 20 21 20 21 22 23 22 20 18 18 Haines index....5 5 5 5 5 5 5 5 5 5 5 5 .TONIGHT... Sky/weather.........Mostly clear (20-30 percent) then becoming mostly cloudy (45-55 percent) then becoming partly cloudy (45-55 percent) then becoming mostly cloudy (60-70 percent). Slight chance of rain showers overnight. Chance of rain showers after 3 am. Temperature.........Min 44. RH..................Max 70 percent. Wind (20 ft)........Southeast winds 14 to 18 mph with gusts to around 30 mph. Smoke dispersal.....Excellent (88500 knot-ft) early in the evening decreasing to poor (10000 knot-ft) late in the night. Mixing height.......600 ft AGL. Transport winds.....Southeast 18 to 23 mph. Haines Index........4 to 5 or low to moderate potential for large plume dominated fire growth. .FRIDAY... Sky/weather.........Mostly cloudy (80-90 percent). Rain showers likely in the morning, then rain showers and chance of thunderstorms in the afternoon. Temperature.........Max 56. RH..................Min 60 percent. Wind (20 ft)........Southeast winds 20 to 24 mph with gusts to around 39 mph. Gusty and erratic winds expected near thunderstorms early in the afternoon. Gusty and erratic winds expected near thunderstorms late in the afternoon. Smoke dispersal.....Fair (19100 knot-ft) early in the morning increasing to excellent (75500 knot-ft) in the afternoon. Mixing height.......2500 ft AGL. Transport winds.....Southeast 25 to 33 mph increasing to 30 to 35 mph in the afternoon. Haines Index........3 to 4 or very low to low potential for large plume dominated fire growth. $$ Forecaster...Dettmann Requested by...Jed Hopp Type of request...PRESCRIBED .TAG 2412342.0/MPX .DELDT 04/25/24 .FormatterVersion 2.0.0 .EMAIL Jed.Hopp@WI.gov