004
FNUS73 KABR 302222
FWSABR

Spot Forecast for Simpson GPA RX...State of South Dakota
National Weather Service Aberdeen SD
522 PM CDT Tue Apr 30 2024

Forecast is based on ignition time of 1800 CDT on April 30.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...
Mainly dry weather will continue through the Wednesday. There is
a small 20 percent chance of rain showers Wednesday afternoon
after 5 PM. Strong winds out of the northwest will continue to
gust 25 to 35 mph through 10 PM. Rainfall amounts over the past
2 days has been estimated at 0.5 to 1 inch. Over the past 24 hours,
rainfall in Eureka has been 0.23 inches. Drier air will move
into the Simpson GPA RX area on Wednesday, with relative humidity
values falling to near 30 percent. During the daytime hours
Wednesday, winds will gust to 15 mph or less through 1 PM,
out of the west or southwest.

.TONIGHT...

Sky/weather.........Partly cloudy (40-55 percent) then mostly
                    clear (20-30 percent).
CWR.................8 percent.
Chance of pcpn......10 percent.
LAL.................1.
Min temperature.....Around 32.
Max humidity........96 percent.
Wind (20 ft)........Northwest winds 15 to 24 mph shifting to the
                    west 9 to 13 mph overnight.
Mixing height.......400-3800 ft agl.
Transport winds.....Northwest 23 to 31 mph becoming west around 10
                    mph.
Smoke dispersal.....Good (97900 knot-ft) early in the evening
                    decreasing to poor (3800 knot-ft) late in the
                    night.
Haines Index........3 to 5 or (very low) to (moderate).

TIME (CDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........46  52  42  28  18  9   6   4   4   4   4   4
Weather cov.....
Weather type....
Tstm cov........
Chc of pcpn (%).10  0   0   0   0   0   0   0   0   0   0   0
Temp............49  48  47  45  43  41  41  40  38  37  35  34
RH..............86  86  86  85  88  91  89  89  89  92  92  92
20 FT wind dir..NW  NW  NW  NW  NW  NW  W   W   W   W   W   W
20 FT wind spd..23  24  22  18  17  15  13  12  10  9   9   9
20 FT wind gust.28  33  33  29  25  21  20  18  16  15  15  13
Mix hgt (kft)...3.8 2.0 0.9 0.6 0.6 0.5 0.5 0.5 0.4 0.4 0.4 0.4
Smoke Dispersal.GD  FR  PR  PR  PR  PR  PR  PR  PR  PR  PR  PR

.WEDNESDAY...

Sky/weather.........Partly sunny (30-40 percent). Slight chance of
                    rain showers late in the afternoon.
CWR.................5 percent.
Chance of pcpn......20 percent.
LAL.................1.
Max temperature.....Around 63.
Min humidity........31 percent.
Wind (20 ft)........Southwest winds 6 to 9 mph shifting to the
                    south 9 to 15 mph late in the afternoon.
Mixing height.......400-7000 ft agl.
Transport winds.....West 8 to 13 mph shifting to the south 14 to 21
                    mph in the afternoon.
Smoke dispersal.....Poor (2900 knot-ft) early in the morning
                    increasing to good (90200 knot-ft) in the
                    afternoon increasing to very good (106100
                    knot-ft) late in the afternoon.
Haines Index........5 to 6 or (moderate) to (high).

TIME (CDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........4   4   5   6   8   12  26  39  50  54  60  63
Weather cov.....                                            SCH
Weather type....                                            RW
Tstm cov........
Chc of pcpn (%).0   0   0   0   0   0   0   0   0   0   10  20
Temp............34  32  37  41  49  53  56  59  61  61  62  61
RH..............92  92  82  76  56  46  38  33  31  33  33  39
20 FT wind dir..W   W   SW  W   SW  SW  SW  SW  S   S   S   S
20 FT wind spd..7   6   7   8   7   8   8   9   9   12  13  15
20 FT wind gust.12  10  10  13  13  13  13  14  15  16  18  17
Mix hgt (kft)...0.4 0.4 0.4 0.6 1.0 2.9 4.4 5.2 6.4 7.0 7.0 6.2
Smoke Dispersal.PR  PR  PR  PR  PR  PR  FR  GD  GD  VGD VGD VGD

$$
Forecaster...KF
Requested by...Zac Hook
Type of request...PRESCRIBED
.TAG 2412850.0/ABR
.DELDT 04/30/24
.FormatterVersion 2.0.0
.EMAIL Zachariah.hook@state.sd.us