FNUS73 KGRB 200949 FWSGRB Spot Forecast for 4th Imp Rx Burn...DNR National Weather Service Green Bay WI 449 AM CDT Mon Apr 20 2026 Forecast is based on ignition time of 1000 CDT on April 20. If conditions become unrepresentative...contact the National Weather Service. Please contact our office if you have questions or concerns with this forecast. .DISCUSSION... Cool temperatures today, starting in the upper 20s and warming into the middle 50s this afternoon. Relative humidity will steadily decrease during the day with minimum values around 25 percent this afternoon. Light winds out of the south this morning will veer around to the southwest this afternoon increase to 10-15 mph with gusts up to 20 mph. No precipitation expected today. .REST OF TODAY... Sky/weather.........Mostly sunny (35-45 percent). Max temperature.....Around 55. Min humidity........26 percent. Wind (20 ft)........Southwest winds 5 to 10 mph. Gusts up to 21 mph late in the afternoon. Mixing height.......4900 ft AGL. Transport winds.....Southwest 9 to 17 mph increasing to around 20 mph late in the afternoon. Smoke dispersal.....Good (31900 knot-ft) early in the morning increasing to excellent (76300 knot-ft) in the afternoon. TIME (CDT) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........23 30 22 40 39 43 49 54 Weather cov..... Weather type.... Tstm cov........ Temp............40 43 46 48 50 53 54 54 RH..............39 33 31 29 29 26 26 28 20 FT wind dir..S SW SW SW SW SW SW S 20 FT wind spd..5 6 7 9 9 10 10 9 20 FT wind gust.11 13 14 16 16 18 18 19 Mix hgt (kft)...4.0 4.4 4.5 4.8 4.9 4.8 4.5 4.0 Transp wind dir.SW SW S S S S SW SW Transp wind spd.9 10 12 15 15 17 20 20 SDspl kt-ft/100032 39 45 62 63 72 76 68 .TONIGHT... Sky/weather.........Partly cloudy (45-55 percent) then becoming mostly cloudy (55-65 percent) then becoming partly cloudy (25-35 percent). Min temperature.....Around 39. Max humidity........89 percent. Wind (20 ft)........South winds 5 to 9 mph with gusts to around 19 mph in the evening and overnight becoming light. Mixing height.......400 ft AGL. Transport winds.....South 10 to 18 mph. Smoke dispersal.....Good (39900 knot-ft) early in the evening decreasing to poor (3300 knot-ft) late in the night. TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM Sky (%).........50 62 68 60 39 21 Weather cov..... Weather type....NONE NONE NONE NONE NONE NONE Tstm cov........ Temp............55 49 44 42 41 40 RH..............30 42 58 67 76 82 20 ft wind......S 9 S 8 S 7 S 6 S 5 S 4 20 ft wind gust.18 18 18 16 14 12 Mix hgt (ft)....2500 900 800 700 600 500 Transport wind..S 18 S 14 S 15 S 14 SW 13 SW 12 SDspl kt-ft/100040 10 11 8 6 5 .TUESDAY... Sky/weather.........Sunny (5-15 percent). Max temperature.....Around 72. Min humidity........35 percent. Wind (20 ft)........Light winds becoming northwest around 5 mph late in the afternoon, then becoming light late in the afternoon. Mixing height.......5200 ft AGL. Transport winds.....Southwest 8 to 10 mph shifting to the northwest 7 to 12 mph in the late morning and afternoon. Smoke dispersal.....Poor (2400 knot-ft) early in the morning increasing to good (52200 knot-ft) in the afternoon. TIME (CDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM Sky (%).........18 14 11 5 3 6 Weather cov..... Weather type....NONE NONE NONE NONE NONE NONE Tstm cov........ Temp............40 47 57 65 70 71 RH..............89 76 62 50 41 35 20 ft wind......S 3 W 2 W 3 NW 4 NW 4 NW 5 20 ft wind gust.8 7 7 8 9 11 Mix hgt (ft)....300 600 1600 2800 4400 5200 Transport wind..SW 10 W 8 NW 7 NW 7 NW 8 NW 12 SDspl kt-ft/10003 4 10 17 31 52 $$ Forecaster...Kaiser Requested by...Darren Ladwig Type of request...PRESCRIBED .TAG 2610808.0/GRB .DELDT 04/20/26 .FormatterVersion 2.0.0 .EMAIL Darren.Ladwig@wisconsin.gov