Spot Forecast
Issued by NWS Grand Rapids, MI
Issued by NWS Grand Rapids, MI
574 FNUS73 KGRR 221556 FWSGRR Spot Forecast for Dune and Swale...MIDNR National Weather Service Grand Rapids MI 1156 AM EDT Wed May 22 2024 Forecast is based on ignition time of 1100 EDT on May 23. 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... Dy weather on Thursday will be followed by increasing chances for rain on Friday, with showers and thunderstorms expected by late Friday morning into the afternoon. .THURSDAY... Sky/weather.........Sunny (5-15 percent). Temperature.........71 at ignition...Max 77. RH..................49 percent at ignition...Min 36 percent. Wind (20 ft)........Winds southwest at 7 mph at ignition...otherwise West winds 5 to 8 mph decreasing to around 5 mph in the evening. Mixing height.......3900 ft AGL at ignition...otherwise 5900 ft AGL. Mixing winds........Southwest 6 to 13 mph. Smoke dispersal.....450 /good/ at ignition. Max...730 /excellent/. Haines Index........5 or moderate potential for large plume dominated fire growth at ignition...max 5. TIME (EDT) 11 AM 1 PM 3 PM 5 PM 7 PM 9 PM Sky (%).........20 13 7 1 2 6 Weather cov..... Weather type....NONE NONE NONE NONE NONE NONE Tstm cov........ Temp............71 73 76 76 75 69 RH..............49 43 36 36 40 51 20 ft wind......SW 7 W 8 W 8 W 7 W 5 SW 2 20 ft wind gust.12 13 13 12 8 5 Mix hgt (ft)....3900 5700 5900 4900 1800 100 Mixing wind.....SW 12 SW 13 SW 12 W 9 W 6 SW 5 Haines index....5 5 5 5 5 5 Smoke disprsl...450 730 700 450 100 0 .THURSDAY NIGHT... Sky/weather.........Mostly clear (5-15 percent). Temperature.........Min 55. RH..................Max 72 percent. Wind (20 ft)........Light winds. Mixing height.......100 ft AGL. Mixing winds........Southwest around 5 mph shifting to the south. Smoke dispersal.....0 (poor). Haines Index........5 or moderate potential for large plume dominated fire growth. .FRIDAY... Sky/weather.........Mostly sunny (35-45 percent). Chance of showers in the afternoon. Slight chance of thunderstorms late in the day. Temperature.........Max 83. RH..................Min 41 percent. Wind (20 ft)........Light winds becoming south 5 to 7 mph. Gusty and erratic winds expected near thunderstorms late in the day. Mixing height.......5700 ft AGL. Mixing winds........South 9 to 17 mph increasing to 13 to 20 mph late in the day. Smoke dispersal.....40 (poor) early in the morning increasing to 1060 (excellent) in the afternoon. Haines Index........4 or low potential for large plume dominated fire growth. $$ Forecaster...Ostuno Requested by...Jeff Vasher Type of request...PRESCRIBED .TAG 2414912.0/GRR .DELDT 05/22/24 .FormatterVersion 2.0.0 .EMAIL vasherj@michigan.gov