####018004087#### FNUS73 KMPX 281238 FWSMPX Spot Forecast for Orrock Piles RX...USFWS National Weather Service Twin Cities/Chanhassen MN 738 AM CDT Thu Mar 28 2024 Forecast is based on ignition time of 0800 CDT on March 28. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. Please contact our office if you have questions or concerns with this forecast. .DISCUSSION... Light westerly winds at ignition, with relative humidity values above 80%. Westerly winds are forecast to remain light through late morning and into the afternoon, with occasional gusts up to 10 mph. Lots of sunshine today, with highs in the low 30s. Minimum relative humidities drop into the 60-65% range this afternoon. .REST OF TODAY... Sky/weather.........Sunny (0-5 percent). Temperature.........11 at ignition...Max 32. RH..................89 percent at ignition...Min 63 percent. Wind (20 ft)........Winds west at 5 mph at ignition...otherwise West winds 5 to 7 mph. Smoke dispersal.....Poor /2500 knot-ft/ at ignition. Max...fair /18000 knot-ft/. Mixing height.......300 ft AGL at ignition...otherwise 2200 ft AGL. Transport winds.....West 8 to 9 mph. Haines Index........4 or low potential for large plume dominated fire growth at ignition...max 4. TIME (CDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM 7PM Sky cover.......CLR CLR CLR CLR CLR CLR CLR CLR CLR CLR CLR CLR Weather cov..... Weather type.... Tstm cov........ Temp............11 10 15 21 24 28 29 31 31 31 30 28 RH..............89 91 92 77 77 68 66 63 66 66 69 71 20 FT wind dir..W W W W W W W W W W W SW 20 FT wind spd..5 5 5 6 7 6 7 7 7 6 5 3 20 FT wind gust.12 10 10 10 10 10 12 12 10 10 9 7 Mix hgt (kft)...0.3 0.4 0.6 1.0 1.5 1.8 2.1 2.2 2.2 2.1 1.8 0.4 Transp wind dir.W NW NW NW NW W W W W W W W Transp wind spd.9 8 8 9 8 9 9 9 9 9 8 5 Haines index....4 4 4 4 4 4 4 4 4 4 4 4 .TONIGHT... Sky/weather.........Mostly clear (15-25 percent) then becoming mostly cloudy (55-65 percent). Temperature.........Min 12. RH..................Max 96 percent. Wind (20 ft)........West winds around 5 mph early in the evening becoming light, then becoming east around 5 mph after 3 am. Smoke dispersal.....Poor (1000 knot-ft). Mixing height.......200 ft AGL. Transport winds.....Southwest 5 to 8 mph shifting to the south around 5 mph overnight, then shifting to the east 5 to 9 mph overnight. Haines Index........4 or low potential for large plume dominated fire growth. .FRIDAY... Sky/weather.........Mostly cloudy (65-75 percent). Slight chance of snow late in the morning. Chance of snow early in the afternoon, then chance of rain late in the afternoon. Temperature.........Max 39. RH..................Min 75 percent. Wind (20 ft)........East winds 6 to 14 mph. Gusts up to 25 mph in the late morning and afternoon. Smoke dispersal.....Poor (3100 knot-ft) early in the morning increasing to fair (23700 knot-ft) in the afternoon. Mixing height.......1300 ft AGL. Transport winds.....East 12 to 21 mph. Haines Index........3 to 4 or very low to low potential for large plume dominated fire growth. $$ Forecaster...Strus Requested by...Bob Bengson Type of request...PRESCRIBED .TAG 2408725.0/MPX .DELDT 03/28/24 .FormatterVersion 2.0.0 .EMAIL robert_bengson@fws.gov