Spot Forecast
Issued by NWS Grand Rapids, MI
Issued by NWS Grand Rapids, MI
790 FNUS73 KGRR 301345 FWSGRR Spot Forecast for Gourdneck Prairie...MIDNR National Weather Service Grand Rapids MI 945 AM EDT Tue Apr 30 2024 Forecast is based on ignition time of 1400 EDT on April 30. If conditions become unrepresentative, contact the National Weather Service. Please contact our office at (616) 949-5150, if you have questions or concerns with this forecast. .DISCUSSION...A dry westerly flow will prevail today leading to sunny skies. The wind will be on the increase as the mixing height deepens, peaking out during the burn. Humidity levels will drop steadily into the afternoon, bottoming out in the 40 to 45 percent range in the middle part of the afternoon. .REST OF TODAY... Sky/weather.........Sunny (0-10 percent). Temperature.........64 at ignition...Max 69. RH..................47 percent at ignition...Min 42 percent. Wind (20 ft)........Winds west at 15 mph at ignition...otherwise West winds 10 to 16 mph. Mixing height.......3800 ft AGL at ignition...otherwise 3900 ft AGL. Mixing winds........West 17 to 24 mph decreasing to around 14 mph in the evening. Smoke dispersal.....880 /excellent/ at ignition. Max...940 /excellent/. Haines Index........5 or moderate potential for large plume dominated fire growth at ignition...max 5. TIME (EDT) 2 PM 4 PM 6 PM 8 PM 10 PM MIDNGT Sky (%).........3 3 3 2 0 8 Weather cov..... Weather type....NONE NONE NONE NONE NONE NONE Tstm cov........ Temp............64 66 67 64 58 54 RH..............47 42 44 54 62 74 20 ft wind......W 15 W 16 W 13 W 7 E 3 SE 5 20 ft wind gust.23 24 20 10 6 7 Mix hgt (ft)....3800 3500 2900 500 400 400 Mixing wind.....W 23 W 22 W 17 W 7 SE 6 SE 9 Haines index....5 5 5 5 5 5 Smoke disprsl...880 760 510 30 20 30 .TONIGHT... Sky/weather.........Mostly clear (20-30 percent) then becoming mostly cloudy (55-65 percent). Temperature.........Min 53. RH..................Max 80 percent. Wind (20 ft)........West winds around 7 mph in the evening becoming light, then becoming southeast 5 to 6 mph late at night shifting to the south 8 to 13 mph. Mixing height.......400 ft AGL. Mixing winds........West around 7 mph shifting to the north around 3 mph in the evening, then shifting to the south 6 to 14 mph shifting to the southwest 15 to 17 mph toward daybreak. Smoke dispersal.....10 (poor). Haines Index........4 to 5 or low to moderate potential for large plume dominated fire growth. .WEDNESDAY... Sky/weather.........Mostly sunny (30-40 percent). Temperature.........Max 71. RH..................Min 33 percent. Wind (20 ft)........Southwest winds 15 to 16 mph shifting to the west 12 to 16 mph. Mixing height.......4100 ft AGL. Mixing winds........Southwest 20 to 25 mph shifting to the northwest around 13 mph. Smoke dispersal.....180 (fair) early in the morning increasing to 960 (excellent) in the afternoon. Haines Index........5 or moderate potential for large plume dominated fire growth. $$ Forecaster...Sekelsky Requested by...Jeff Vasher Type of request...PRESCRIBED .TAG 2412776.0/GRR .DELDT 04/30/24 .FormatterVersion 2.0.0 .EMAIL vasherj@michigan.gov