903
FNUS73 KABR 090124
FWSABR

Spot Forecast for Perch Lake WPA RX...US Fish and Wildlife Service
National Weather Service Aberdeen SD
824 PM CDT Thu May 8 2025

Forecast is based on ignition time of 2100 CDT on May 08.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...Southerly breezes will persist into the overnight
hours, then eventually turn southwest towards early morning,
before switching to the north on Friday behind a passing frontal
boundary. Humidity values are forecast to stay below 60 percent
through midnight, then bottom out around 25 percent by late
afternoon Friday.

.REST OF TONIGHT...

Sky/weather.........Mostly clear (15-25 percent).
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of lightning.1 percent.
Min temperature.....Around 52.
Max humidity........71 percent.
Wind (20 ft)........South winds 10 to 13 mph.
Mixing height.......400-500 ft agl.
Transport winds.....South 13 to 16 mph.
Smoke dispersal.....Poor (4700 knot-ft).

TIME (CDT)      9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........14  11  16  7   5   7   14  17  37
Weather cov.....
Weather type....
Tstm cov........
Chc of pcpn (%).0   0   0   0   0   0   0   0   0
Chc of ltng (%).0   0   0   0   0   0   0   0   0
Temp............66  63  61  60  58  58  56  55  55
RH..............45  50  53  53  58  60  64  66  66
20 FT wind dir..S   S   S   S   S   S   S   SW  SW
20 FT wind spd..13  12  12  13  13  12  10  12  10
20 FT wind gust.17  17  18  17  18  20  20  20  17
Mix hgt (kft)...0.5 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4
Smoke Dispersal.PR  PR  PR  PR  PR  PR  PR  PR  PR

.FRIDAY...

Sky/weather.........Partly sunny (40-50 percent) then becoming
                    sunny (0-10 percent).
CWR.................4 percent.
Chance of pcpn......10 percent.
Chance of lightning.9 percent.
Max temperature.....Around 80.
Min humidity........24 percent.
Wind (20 ft)........Southwest winds around 9 mph shifting to the
                    northeast 14 to 15 mph late in the morning.
Mixing height.......300-6200 ft agl.
Transport winds.....Southwest 13 to 14 mph shifting to the north 14
                    to 18 mph late in the morning, then shifting to
                    the northeast 17 to 20 mph in the afternoon.
Smoke dispersal.....Poor (3800 knot-ft) early in the morning
                    increasing to good (92800 knot-ft) in the
                    afternoon.

TIME (CDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........51  76  68  48  57  32  20  21  16  14  2   4
Weather cov.....
Weather type....
Tstm cov........
Chc of pcpn (%).0   0   0   0   0   0   0   10  10  10  10  10
Chc of ltng (%).0   0   0   0   0   0   0   10  10  10  10  10
Temp............54  53  57  62  69  72  75  77  78  78  78  79
RH..............69  71  64  56  45  39  37  33  31  28  27  25
20 FT wind dir..SW  SW  W   NW  N   N   N   NE  NE  NE  NE  NE
20 FT wind spd..9   9   9   12  13  14  14  14  14  14  15  15
20 FT wind gust.17  16  17  18  18  20  21  20  21  21  21  20
Mix hgt (kft)...0.4 0.3 0.4 0.9 1.4 2.0 2.8 3.2 4.2 5.3 5.8 6.2
Smoke Dispersal.PR  PR  PR  PR  PR  PR  FR  FR  GD  GD  GD  GD

.FRIDAY NIGHT...

Sky/weather.........Clear (0-10 percent) then becoming mostly clear
                    (20-30 percent).
CWR.................4 percent.
Chance of pcpn......10 percent.
Chance of lightning.9 percent.
Min temperature.....Around 46.
Max humidity........60 percent.
Wind (20 ft)........Northeast winds 10 to 14 mph.
Mixing height.......400-6300 ft agl.
Transport winds.....North 15 to 16 mph shifting to the east early
                    in the evening.
Smoke dispersal.....Good (88200 knot-ft) early in the evening
                    decreasing to poor (5000 knot-ft) late in the
                    night.

TIME (CDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........3   7   27  26  32  30  31  15  17  20  22  23
Weather cov.....
Weather type....
Tstm cov........
Chc of pcpn (%).10  10  10  10  0   0   0   0   0   0   0   0
Chc of ltng (%).10  10  10  10  10  10  10  0   0   0   0   0
Temp............79  77  73  68  63  59  57  55  53  51  49  47
RH..............24  26  29  33  39  45  47  49  50  52  54  58
20 FT wind dir..NE  NE  NE  NE  NE  NE  NE  E   E   E   E   E
20 FT wind spd..14  13  12  12  10  10  12  12  12  12  10  10
20 FT wind gust.18  18  16  16  16  16  17  17  17  17  17  16
Mix hgt (kft)...6.3 5.8 0.8 0.6 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4
Smoke Dispersal.GD  GD  PR  PR  PR  PR  PR  PR  PR  PR  PR  PR

.SATURDAY...

Sky/weather.........Mostly sunny (10-20 percent).
CWR.................1 percent.
Chance of pcpn......0 percent.
Chance of lightning.3 percent.
Max temperature.....Around 83.
Min humidity........23 percent.
Wind (20 ft)........East winds 10 to 15 mph shifting to the south
                    16 to 21 mph in the late morning and afternoon.
Mixing height.......400-4900 ft agl.
Transport winds.....Southeast 16 to 17 mph shifting to the south 17
                    to 21 mph late in the morning.
Smoke dispersal.....Poor (5600 knot-ft) early in the morning
                    increasing to good (88400 knot-ft) in the
                    afternoon.

TIME (CDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........23  19  14  10  5   6   6   7   7   7   7   7
Weather cov.....
Weather type....
Tstm cov........
Chc of pcpn (%).0   0   0   0   0   0   0   0   0   0   0   0
Chc of ltng (%).0   0   0   0   0   0   0   0   0   0   0   0
Temp............46  47  50  56  61  66  70  74  77  80  81  82
RH..............60  56  52  45  41  36  32  28  25  24  23  23
20 FT wind dir..E   E   E   SE  SE  SE  S   S   S   S   S   S
20 FT wind spd..10  12  13  15  16  17  17  18  20  21  21  21
20 FT wind gust.16  16  17  18  21  23  25  26  28  28  28  28
Mix hgt (kft)...0.4 0.4 0.9 1.4 1.8 2.2 2.6 2.9 3.6 4.3 4.9 4.4
Smoke Dispersal.PR  PR  PR  PR  PR  PR  FR  FR  GD  GD  GD  GD

$$
Forecaster...TMT
Requested by...Todd Ruzicka
Type of request...PRESCRIBED
.TAG 2513587.0/ABR
.DELDT 05/08/25
.FormatterVersion 2.0.0
.EMAIL todd_ruzicka@fws.gov