Spot Forecast
Issued by NWS Sioux Falls, SD

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244
FNUS73 KFSD 021112
FWSFSD

Spot Forecast for Black Rush Lake...FWS
National Weather Service Sioux Falls SD
612 AM CDT Sat May 2 2026

If conditions become unrepresentative, contact the National Weather
Service.

.DISCUSSION...
Wind direction may be slightly terrain-dependent early this morning,
but should generally favor 230 to 260 degrees throughout the day.
Gusts develop within 2-3 hours of sunrise, peaking midday through
sunset at 20 to 25 mph.

While wind gusts will generally diminish at sunset as the inversion
develops, spotty light rain showers could produce erratic gusts up
to 30 to 35 mph.

.REST OF TODAY...

Max temperature.....Around 64.
Min humidity........28 percent.

TIME (CDT)      7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky cover.......MCR MCR MCR MCR CLR CLR PC  PC  PC  MC  MC
Sky (%).........13  19  16  12  3   2   27  31  34  54  66
Weather cov.....
Weather type....
Tstm cov........
Chc of pcpn (%).0   0   0   0   0   0   0   0   0   0   0
Chc of thdr (%).0   0   0   0   0   0   0   0   0   0   0
Temp............34  40  42  50  54  57  60  62  63  64  63
Dewpoint........27  27  29  30  30  31  31  31  30  30  31
RH..............75  59  60  46  40  37  33  31  29  28  30
20 FT wind dir..SW  WSW WSW WSW WSW WSW W   W   WSW WSW WSW
20 FT wind spd..10  12  13  14  14  15  15  16  16  16  16
20 FT wind gust.14  16  20  22  22  23  23  24  24  25  24
Mix hgt (kft)...0.3 0.4 0.8 1.7 3.1 4.6 6.8 7.2 7.4 7.0 5.3
Transp wind dir.WSW WSW WSW W   W   W   W   W   W   W   WSW
Transp wind spd.14  15  17  17  18  18  18  20  20  22  23
Smoke Dispersal.PR  PR  PR  FR  GD  EX  EX  EX  EX  EX  EX

.TONIGHT...

Min temperature.....Around 43.
Max humidity........82 percent.

TIME (CDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky cover.......MC  MC  CDY CDY CDY MC  MC  MC  MC  MC  MC  PC
Sky (%).........67  80  89  91  91  85  70  74  65  60  52  44
Weather cov.....    SCH SCH SCH SCH SCH
Weather type....    RW  RW  RW  RW  RW
Tstm cov........
Chc of pcpn (%).10  10  20  20  10  10  0   0   0   0   0   0
Chc of thdr (%).0   10  10  10  10  10  10  0   0   0   0   0
Temp............64  62  60  57  55  54  53  52  50  48  45  45
Dewpoint........31  32  32  31  32  32  34  36  37  39  39  39
RH..............29  32  35  37  41  43  48  54  61  71  79  79
20 FT wind dir..WSW SW  SW  SSW SSW SW  W   WNW NW  NW  NNW NNW
20 FT wind spd..15  14  14  14  13  14  13  13  13  13  14  14
20 FT wind gust.23  21  22  21  18  18  18  18  18  18  20  18
Mix hgt (kft)...5.6 1.9 0.6 0.6 0.5 0.5 0.5 0.6 0.6 0.6 0.7 0.9
Transp wind dir.W   SW  SW  SW  SSW SW  W   WNW NW  NNW NNW N
Transp wind spd.23  17  14  14  16  18  18  16  18  20  21  22
Smoke Dispersal.EX  FR  PR  PR  PR  PR  PR  PR  PR  PR  PR  FR

.SUNDAY...

Max temperature.....Around 65.
Min humidity........29 percent.

TIME (CDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky cover.......PC  PC  PC  PC  MCR MCR MCR MCR MCR CLR CLR CLR
Sky (%).........35  34  41  28  15  13  11  9   7   5   3   5
Weather cov.....
Weather type....
Tstm cov........
Chc of pcpn (%).0   0   0   0   0   0   0   0   0   0   0   0
Chc of thdr (%).0   0   0   0   0   0   0   0   0   0   0   0
Temp............44  43  45  47  50  53  56  58  60  62  63  65
Dewpoint........38  38  37  36  35  34  32  31  31  31  31  32
RH..............79  82  73  65  56  48  40  36  33  31  30  29
20 FT wind dir..NNW NNW NNW NNW NNW NNW NNW NNW NW  NW  WNW WNW
20 FT wind spd..14  14  14  14  15  15  14  14  14  14  14  14
20 FT wind gust.20  20  21  22  24  24  23  23  23  23  23  23
Mix hgt (kft)...0.9 0.9 1.6 2.1 2.5 3.2 3.9 4.6 5.2 5.7 6.0 6.2
Transp wind dir.N   NNW NNW NNW NNW NNW NNW NNW NW  WNW WNW WNW
Transp wind spd.22  23  24  23  21  18  16  15  15  15  16  17
Smoke Dispersal.FR  FR  GD  GD  GD  GD  GD  GD  EX  EX  EX  EX

$$
Forecaster...JH
Requested by...Millette
Type of request...PRESCRIBED
.TAG 2612487.0/FSD
.DELDT 05/02/26
.FormatterVersion 2.0.0
.EMAIL phil_millette@fws.gov