830
FNUS73 KGRB 030932
FWSGRB

Spot Forecast for Dunbar Unit 1...WI DNR
National Weather Service Green Bay WI
432 AM CDT Sun Aug 3 2025

Forecast is based on ignition time of 0600 CDT on August 04.
If conditions become unrepresentative...contact the National Weather
Service.

Please contact our office if you have questions or concerns with
this forecast.

.DISCUSSION...

Near-surface smoke will impact the site at times on Monday and
possibly on Tuesday. Dry conditions are expected with afternoon
relative humidity values forecast to drop to around 40 percent.
Southeast winds will remain fairly light, but could gust up to
15 mph each afternoon.

.MONDAY...

Sky/weather.........Partly sunny (50-60 percent). Areas of smoke.
Max temperature.....Around 82.
Min humidity........44 percent.
Wind (20 ft)........Light winds becoming southeast 5 to 6 mph in
                    the afternoon.
Mixing height.......6600 ft AGL.
Transport winds.....West 3 to 6 mph shifting to the south 3 to 9
                    mph in the late morning and afternoon.
Smoke dispersal.....Poor (900 knot-ft) early in the morning
                    increasing to good (52600 knot-ft) in the
                    afternoon.

TIME (CDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........51  54  52  46  44  55  60  64  63  61  60  58
Weather cov.....ARS ARS ARS ARS ARS ARS ARS ARS ARS ARS ARS ARS
Weather type....SMK SMK SMK SMK SMK SMK SMK SMK SMK SMK SMK SMK
Tstm cov........
Temp............57  59  63  70  74  76  78  80  81  81  81  80
RH..............90  87  84  68  57  54  50  43  41  45  46  47
20 FT wind dir..W   W   W   S   S   S   S   S   S   S   SE  SE
20 FT wind spd..1   1   1   1   2   3   3   5   6   6   6   6
20 FT wind gust.2   2   3   5   6   7   8   9   9   9   9   9
Mix hgt (kft)...0.4 0.3 0.8 1.8 3.6 4.9 5.6 5.9 6.4 6.6 6.2 4.8
Transp wind dir.W   W   W   S   S   S   S   S   S   S   S   S
Transp wind spd.6   3   3   3   6   6   6   7   8   9   9   9
SDspl kt-ft/10002   1   2   5   18  25  28  36  45  53  50  39

.MONDAY NIGHT...

Sky/weather.........Mostly cloudy (55-65 percent). Areas of smoke
                    early in the evening.
Min temperature.....Around 58.
Max humidity........90 percent.
Wind (20 ft)........Southeast winds 5 to 6 mph early in the evening
                    becoming light.
Mixing height.......300 ft AGL.
Transport winds.....Southeast 5 to 8 mph.
Smoke dispersal.....Fair (21100 knot-ft) early in the evening
                    decreasing to poor (1000 knot-ft) late in the
                    night.

TIME (CDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........57  57  55  54  52  56  61  65  65  65  65  60
Weather cov.....ARS
Weather type....SMK
Tstm cov........
Temp............79  76  73  69  66  64  62  61  60  59  59  58
RH..............49  54  59  68  75  78  84  84  84  87  87  90
20 FT wind dir..SE  SE  SE  SE  SE  SE  SE  E   E   E   E   E
20 FT wind spd..6   5   3   3   2   2   1   1   1   1   1   1
20 FT wind gust.10  10  10  9   8   7   7   6   5   5   5   5
Mix hgt (kft)...3.0 1.4 0.8 0.5 0.4 0.3 0.4 0.4 0.4 0.4 0.4 0.3
Transp wind dir.S   S   SE  SE  SE  SE  SE  SE  SE  SE  SE  SE
Transp wind spd.8   8   8   8   8   8   7   7   7   6   6   5
SDspl kt-ft/100021  10  5   3   3   2   2   3   3   2   2   1

.TUESDAY...

Sky/weather.........Mostly sunny (45-55 percent).
Max temperature.....Around 82.
Min humidity........44 percent.
Wind (20 ft)........Light winds becoming southeast 5 to 7 mph late
                    in the morning.
Mixing height.......7300 ft AGL.
Transport winds.....Southeast 2 to 9 mph shifting to the south 12
                    to 16 mph in the afternoon.
Smoke dispersal.....Poor (600 knot-ft) early in the morning
                    increasing to excellent (95300 knot-ft) in the
                    afternoon increasing to excellent (62700
                    knot-ft) late in the afternoon.

TIME (CDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........54  49  49  50  50  51  52  53  50  46  43  45
Weather cov.....
Weather type....
Tstm cov........
Temp............59  60  64  69  73  76  79  80  81  82  81  81
RH..............90  90  81  70  64  58  52  49  45  42  46  46
20 FT wind dir..E   NE  E   SE  SE  SE  SE  SE  SE  SE  SE  SE
20 FT wind spd..1   1   1   2   3   5   6   7   7   7   7   7
20 FT wind gust.5   6   7   8   9   12  14  15  16  16  16  16
Mix hgt (kft)...0.2 0.4 0.9 1.7 2.8 4.2 5.7 6.9 7.3 7.2 6.6 5.2
Transp wind dir.SE  SE  SE  SE  S   S   S   S   S   S   S   S
Transp wind spd.3   2   3   5   7   9   12  14  15  16  16  14
SDspl kt-ft/10001   1   3   7   17  34  58  82  95  101 92  63

$$
Forecaster...Bersch
Requested by...Aaron McCullough
Type of request...PRESCRIBED
.TAG 2518950.0/GRB
.DELDT 08/01/25
.FormatterVersion 2.0.0
.EMAIL Aaron.McCullough@Wisconsin.gov