878
FNUS73 KGRB 041024
FWSGRB

Spot Forecast for Dunbar Unit 1...DNR
National Weather Service Green Bay WI
524 AM CDT Mon Aug 4 2025

Forecast is based on ignition time of 1200 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 today and tonight, and
likely again on Tuesday. Dry weather is expected today with high
clouds much of the day, with some lower clouds developing at times
as well within the already hazy sky. Afternoon RH values will be
40s, possibly the upper 30s for a time this afternoon, with south
to southeast winds of 5-10 mph, with a few gusts up to 15 mph.

.THIS AFTERNOON...

Sky/weather.........Partly sunny (55-65 percent). Areas of smoke.
Max temperature.....Around 81.
Min humidity........42 percent.
Wind (20 ft)........Southeast winds 5 to 6 mph.
Mixing height.......6900 ft AGL.
Transport winds.....South 7 to 9 mph.
Smoke dispersal.....Good (36700 knot-ft).

TIME (CDT)      12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........53  58  60  62  63  61
Weather cov.....ARS ARS ARS ARS ARS ARS
Weather type....SMK SMK SMK SMK SMK SMK
Tstm cov........
Temp............76  78  80  79  80  79
RH..............54  47  42  44  44  45
20 FT wind dir..S   SE  SE  SE  SE  SE
20 FT wind spd..5   6   6   6   6   6
20 FT wind gust.8   9   9   10  10  12
Mix hgt (kft)...5.6 6.1 6.6 6.9 6.5 5.6
Transp wind dir.S   S   S   S   S   S
Transp wind spd.8   7   8   9   9   8
SDspl kt-ft/100039  37  47  55  52  40

.TONIGHT...

Sky/weather.........Mostly cloudy (55-65 percent). Areas of smoke.
Min temperature.....Around 57.
Max humidity........96 percent.
Wind (20 ft)........Southeast winds 5 to 6 mph early in the evening
                    becoming light.
Mixing height.......400 ft AGL.
Transport winds.....Southeast 6 to 9 mph shifting to the east 6 to
                    7 mph overnight.
Smoke dispersal.....Good (34700 knot-ft) early in the evening
                    decreasing to poor (2000 knot-ft) late in the
                    night.

TIME (CDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........58  55  56  56  56  59  62  65  65  65  66  63
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............79  76  72  68  66  63  62  60  59  59  59  58
RH..............47  54  61  73  78  84  87  90  93  90  90  93
20 FT wind dir..SE  SE  SE  SE  SE  SE  N   N   N   NE  N   N
20 FT wind spd..6   6   5   3   2   1   0   0   0   1   1   1
20 FT wind gust.12  12  10  9   8   7   6   5   5   5   5   5
Mix hgt (kft)...4.3 1.1 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4
Transp wind dir.S   SE  SE  SE  SE  SE  SE  E   E   E   E   E
Transp wind spd.9   7   8   7   6   6   6   7   7   6   6   6
SDspl kt-ft/100035  7   3   3   2   2   2   3   2   2   2   2

.TUESDAY...

Sky/weather.........Partly sunny (50-60 percent). Areas of smoke in
                    the morning, then haze late in the morning.
                    Haze in the afternoon.
Max temperature.....Around 81.
Min humidity........49 percent.
Wind (20 ft)........Light winds becoming southeast 5 to 7 mph late
                    in the morning.
Mixing height.......6300 ft AGL.
Transport winds.....East 5 to 7 mph shifting to the southeast 7 to
                    14 mph in the late morning and afternoon.
Smoke dispersal.....Poor (1600 knot-ft) early in the morning
                    increasing to excellent (75500 knot-ft) in the
                    afternoon.

TIME (CDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........60  57  54  50  47  53  59  65  63  61  60  52
Weather cov.....ARS ARS ARS ARS ARS DEF     DEF DEF DEF DEF DEF
Weather type....SMK SMK SMK SMK SMK HAZ     HAZ HAZ HAZ HAZ HAZ
Tstm cov........
Temp............58  59  63  69  74  75  77  79  80  80  80  80
RH..............93  96  90  78  69  64  60  54  51  49  49  49
20 FT wind dir..NE  NE  NE  E   SE  SE  SE  SE  SE  SE  SE  SE
20 FT wind spd..2   2   2   3   3   5   6   7   7   7   7   7
20 FT wind gust.5   5   6   7   9   10  13  14  15  15  15  15
Mix hgt (kft)...0.4 0.4 0.7 1.1 2.0 3.5 4.8 5.6 6.2 6.3 5.9 4.7
Transp wind dir.NE  E   E   E   SE  SE  SE  S   S   S   S   S
Transp wind spd.6   5   6   7   7   10  13  13  14  14  14  13
SDspl kt-ft/10002   2   3   6   12  32  53  62  74  76  70  52

$$
Forecaster...Bersch
Requested by...Aaron McCullough
Type of request...PRESCRIBED
.TAG 2519157.1/GRB
.DELDT 08/04/25
.FormatterVersion 2.0.0
.EMAIL Aaron.McCullough@wisconsin.gov