FNUS73 KGRB 211147 FWSGRB Spot Forecast for Ganshow...DNR National Weather Service Green Bay WI 647 AM CDT Tue Apr 21 2026 Forecast is based on ignition time of 0700 CDT on April 21. If conditions become unrepresentative...contact the National Weather Service. Please contact our office if you have questions or concerns with this forecast. .DISCUSSION...Dry weather is expected at the burn site today. A weak surface trough will move through the region, which will shift winds from the south this morning to the northwest around midday. Minimum humidity levels will fall to 30-35 percent by mid- afternoon. Mixing heights will be slow to rise this morning, but then peak around 5000 ft this afternoon. .REST OF TODAY... Sky/weather.........Sunny (0-10 percent). Max temperature.....Around 72. Min humidity........34 percent. Wind (20 ft)........Light winds becoming west around 5 mph early in the morning, then becoming light in the afternoon. Mixing height.......4800 ft AGL. Transport winds.....Southwest 10 to 12 mph shifting to the north 5 to 8 mph in the afternoon. Smoke dispersal.....Poor (4000 knot-ft) early in the morning increasing to fair (29600 knot-ft) in the afternoon. TIME (CDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........10 7 6 6 3 7 5 3 9 8 9 Weather cov..... Weather type.... Tstm cov........ Temp............43 45 50 56 59 63 67 70 70 71 70 RH..............73 73 68 59 55 48 40 36 35 34 35 20 FT wind dir..S SW W W W NW N N N N NE 20 FT wind spd..3 5 5 5 5 3 2 2 2 2 2 20 FT wind gust.10 12 10 9 8 7 6 7 7 7 7 Mix hgt (kft)...0.4 0.6 1.2 1.4 1.8 2.2 3.0 3.4 4.1 4.8 4.2 Transp wind dir.SW SW W W NW N N N N NW N Transp wind spd.10 12 12 8 7 5 5 6 6 7 8 SDspl kt-ft/10004 6 12 10 11 9 12 17 21 29 30 $$ Forecaster...MPC Requested by...Angela Rogers Type of request...PRESCRIBED .TAG 2611070.0/GRB .DELDT 04/21/26 .FormatterVersion 2.0.0 .EMAIL angela.rogers@wisconsin.gov