542
FNUS73 KABR 201244
FWSABR

Spot Forecast for Blythe RX...State of South Dakota
National Weather Service Aberdeen SD
744 AM CDT Sun Apr 20 2025

Forecast is based on ignition time of 0800 CDT on April 20.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...South to southeast winds can be expected today at
the burn site. By late morning into early afternoon, gusts will be
flirting with 25 mph. Winds will actually be on a slow decrease by
late afternoon into early evening. Humidity is forecast to drop
into the 30s by late morning, and eventually bottom out close to
25 percent by late afternoon.

.REST OF TODAY...

Sky/weather.........Partly sunny (55-65 percent).
CWR.................1 percent.
Chance of pcpn......0 percent.
Chance of lightning.0 percent.
Max temperature.....Around 61.
Min humidity........26 percent.
Wind (20 ft)........Southeast winds 12 to 16 mph.
Mixing height.......500-6400 ft agl.
Transport winds.....South 15 to 24 mph shifting to the southeast
                    around 13 mph late in the afternoon.
Smoke dispersal.....Poor (8900 knot-ft) early in the morning
                    increasing to good (86900 knot-ft) in the
                    afternoon.

TIME (CDT)      8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........52  52  54  51  58  57  52  63  73  61
Weather cov.....
Weather type....
Tstm cov........
Chc of pcpn (%).0   0   0   0   0   0   0   0   0   0
Chc of ltng (%).0   0   0   0   0   0   0   0   0   0
Temp............40  46  50  53  55  57  59  59  59  60
RH..............55  45  41  37  34  30  28  26  26  26
20 FT wind dir..S   S   S   S   S   S   SE  SE  SE  SE
20 FT wind spd..12  13  14  15  16  15  14  13  12  12
20 FT wind gust.15  16  17  20  23  21  21  20  18  18
Mix hgt (kft)...0.5 1.3 2.5 3.3 4.1 5.4 6.2 6.4 6.4 6.2
Smoke Dispersal.PR  PR  FR  GD  GD  GD  GD  GD  GD  GD

.TONIGHT...

Sky/weather.........Mostly cloudy (60-70 percent) then becoming
                    partly cloudy (25-35 percent).
CWR.................1 percent.
Chance of pcpn......0 percent.
Chance of lightning.0 percent.
Min temperature.....Around 33.
Max humidity........87 percent.
Wind (20 ft)........East winds 5 to 13 mph shifting to the
                    northwest around 6 mph after 3 am.
Mixing height.......400-5600 ft agl.
Transport winds.....East 6 to 13 mph shifting to the west 6 to 7
                    mph after 3 am.
Smoke dispersal.....Good (61800 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 (%).........69  78  77  73  65  56  48  34  26  18  14  12
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............59  57  54  48  45  43  41  40  38  37  35  35
RH..............27  29  35  46  51  57  65  70  76  79  80  84
20 FT wind dir..SE  E   E   E   SE  SE  E   E   E   NW  NW  NW
20 FT wind spd..13  12  10  9   8   7   6   5   6   6   6   6
20 FT wind gust.17  17  16  15  13  13  12  10  9   8   8   8
Mix hgt (kft)...5.6 4.2 0.9 0.6 0.5 0.5 0.4 0.4 0.4 0.4 0.4 0.4
Smoke Dispersal.GD  FR  PR  PR  PR  PR  PR  PR  PR  PR  PR  PR

.MONDAY...

Sky/weather.........Mostly sunny (5-15 percent).
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of lightning.0 percent.
Max temperature.....Around 67.
Min humidity........27 percent.
Wind (20 ft)........Northwest winds around 5 mph shifting to the
                    north early in the morning, then shifting to
                    the southeast early in the morning shifting to
                    the east 5 to 6 mph late in the morning
                    shifting to the southeast 6 to 8 mph increasing
                    to 9 to 10 mph late in the afternoon.
Mixing height.......400-6600 ft agl.
Transport winds.....West 5 to 7 mph shifting to the southeast
                    around 7 mph late in the morning, then shifting
                    to the southwest 8 to 13 mph in the afternoon.
Smoke dispersal.....Poor (1800 knot-ft) early in the morning
                    increasing to good (71200 knot-ft) in the
                    afternoon.

TIME (CDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........10  8   9   11  11  11  10  8   6   6   6   9
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............35  33  37  42  50  53  57  61  63  65  66  66
RH..............87  84  76  68  52  45  37  31  29  27  27  27
20 FT wind dir..NW  N   SE  E   NE  E   E   SE  SE  SE  S   SE
20 FT wind spd..5   5   5   5   5   6   6   7   8   8   9   10
20 FT wind gust.7   7   8   8   9   10  9   10  13  13  14  15
Mix hgt (kft)...0.4 0.4 0.4 1.0 1.6 2.6 4.0 5.0 5.5 6.2 6.6 6.3
Smoke Dispersal.PR  PR  PR  PR  PR  PR  PR  PR  PR  FR  GD  GD

$$
Forecaster...TMT
Requested by...Brett Blank
Type of request...PRESCRIBED
.TAG 2511086.0/ABR
.DELDT 04/20/25
.FormatterVersion 2.0.0
.EMAIL brett.blank@state.sd.us