FNUS73 KGRR 120741 FWSGRR Spot Forecast for FCTC Rx...Fort Custer National Gaurd National Weather Service Grand Rapids MI 341 AM EDT Sun May 12 2024 Forecast is based on ignition time of 1200 EDT on May 12. 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... Skies should be mostly sunny into late afternoon. Light winds may be in place around ignition time but winds are expected to increase by early afternoon. Clouds may increase this afternoon. Showers and thunderstorms should remain well to the north of the burn site until overnight tonight. .TODAY... Sky/weather.........Sunny (5-20 percent). Temperature.........63 at ignition...Max 76. RH..................48 percent at ignition...Min 34 percent. Wind (20 ft)........Winds southwest at 10 mph at ignition...otherwise Light winds becoming southwest 6 to 14 mph. Mixing height.......2900 ft AGL at ignition...otherwise 5800 ft AGL. Mixing winds........Southwest 6 to 15 mph increasing to 16 to 23 mph in the afternoon. Smoke dispersal.....360 /good/ at ignition. Max...1120 /excellent/ increasing to 280 (fair) early in the morning increasing to 1340 (excellent) in the afternoon late in the day. Haines Index........5 or moderate potential for large plume dominated fire growth at ignition...max 5. TIME (EDT) NOON 2 PM 4 PM 6 PM 8 PM 10 PM Sky (%).........3 13 20 15 15 15 Weather cov..... Weather type....NONE NONE NONE NONE NONE NONE Tstm cov........ Temp............63 70 75 76 73 66 RH..............48 41 34 34 44 56 20 ft wind......SW 10 SW 12 SW 14 SW 14 SW 10 SW 13 20 ft wind gust.14 18 22 22 17 18 Mix hgt (ft)....2900 4300 5400 5100 600 500 Mixing wind.....SW 13 SW 16 SW 21 SW 23 SW 15 SW 16 Haines index....5 5 5 5 5 5 Smoke disprsl...360 680 1120 1170 90 80 .TONIGHT... Sky/weather.........Mostly cloudy (60-70 percent). Chance of rain showers and thunderstorms after midnight. Temperature.........Min 59. RH..................Max 72 percent. Wind (20 ft)........Southwest winds 10 to 15 mph. Gusty and erratic winds expected near thunderstorms late at night. Mixing height.......400 ft AGL. Mixing winds........Southwest 14 to 18 mph. Smoke dispersal.....60 (poor). Haines Index........4 to 5 or low to moderate potential for large plume dominated fire growth. .MONDAY... Sky/weather.........Mostly cloudy (75-85 percent).Chance of rain showers and thunderstorms early. Rain showers and thunderstorms likely in the afternoon. Temperature.........Max 78. RH..................Min 48 percent. Wind (20 ft)........Southwest winds 10 to 14 mph. Gusty and erratic winds expected near thunderstorms. Gusty and erratic winds expected near thunderstorms late in the day. Mixing height.......5600 ft AGL. Mixing winds........Southwest 13 to 21 mph decreasing to 9 to 10 mph late in the day. Smoke dispersal.....80 (poor) early in the morning increasing to 1100 (excellent) in the afternoon. Haines Index........4 or low potential for large plume dominated fire growth. $$ Forecaster...Maczko Requested by...Lee Osterland Type of request...PRESCRIBED .TAG 2413790.0/GRR .DELDT 05/12/24 .FormatterVersion 2.0.0 .EMAIL osterlandlee@gmail.com