235
FNUS73 KFSD 101347
FWSFSD
SPOT FORECAST FOR PIPE UNIT 1 AND 3...NPS
NATIONAL WEATHER SERVICE SIOUX FALLS SD
847 AM CDT SUN MAY 10 2026
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
TODAY'S HIGH TEMPERATURE WILL PEAK AT ABOUT 64 DEGREES F. DEW POINTS
CURRENTLY RESIDE AROUND 31 DEGREES F BUT LOOK TO LOWER TO ABOUT 27
DEGREES F BY THIS AFTERNOON. THIS WILL RESULT IN A MINIMUM HUMIDITY
VALUE OF ABOUT 24%. WINDS WILL PICK UP OUT OF THE NORTHWEST WITH
SPEEDS OF ABOUT 10-15 MPH. GUSTS UP TO 20-25 MPH IS EXPECTED BUT
ISOLATED GUSTS TO ABOUT 30 MPH IS ALSO ON THE TABLE FOR TODAY.
ESPECIALLY DURING THE FIRST HALF OF THE AFTERNOON TIMEFRAME. THUS,
NEAR CRITICAL CONDITIONS ARE EXPECTED FOR THIS AFTERNOON UNTIL WINDS
WEAKEN WHILE TEMPERATURES COOL THIS EVENING.
MONDAY
MAX TEMPERATURE.....AROUND 75.
MIN HUMIDITY........24 PERCENT.
TIME (CDT) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY COVER.......CLR MCR PC CLR MCR CLR MCR PC MC
SKY (%).........4 22 26 3 12 4 11 41 54
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CHC OF PCPN (%).0 0 0 0 0 0 0 0 0
CHC OF THDR (%).0 0 0 0 10 10 10 10 10
TEMP............45 54 59 63 66 69 72 73 74
DEWPOINT........24 26 28 29 31 32 33 34 35
RH..............43 34 30 28 27 25 24 24 24
20 FT WIND DIR..SE SE SSE SSE SSE SSE SSE SSE SSE
20 FT WIND SPD..9 10 13 14 15 16 17 18 18
20 FT WIND GUST.14 16 18 20 22 23 24 25 26
MIX HGT (KFT)...1.2 2.0 2.8 3.4 3.8 4.5 4.8 4.6 5.0
TRANSP WIND DIR.SSE SSE S S S S S S S
TRANSP WIND SPD.15 16 17 17 18 21 22 22 23
SMOKE DISPERSAL.FR FR GD GD EX EX EX EX EX
MONDAY NIGHT
MIN TEMPERATURE.....AROUND 53.
MAX HUMIDITY........66 PERCENT.
TIME (CDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY COVER.......MC PC PC PC PC PC PC PC PC PC MC PC
SKY (%).........53 37 36 42 48 45 42 39 44 49 54 49
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CHC OF PCPN (%).0 10 10 10 10 10 10 10 10 10 10 10
CHC OF THDR (%).10 20 20 20 20 20 20 20 20 20 20 20
TEMP............75 74 71 67 64 63 62 62 61 59 57 55
DEWPOINT........36 38 39 39 39 39 40 41 42 43 43 43
RH..............24 27 31 36 40 41 44 46 50 55 59 64
20 FT WIND DIR..SSE SSE SSE SSE SSE S S SSW SSW WSW WSW W
20 FT WIND SPD..18 17 17 18 20 21 21 20 17 16 14 13
20 FT WIND GUST.26 25 25 28 30 31 31 30 28 25 23 22
MIX HGT (KFT)...4.1 2.5 1.2 0.9 0.6 0.7 0.7 0.8 0.7 0.7 0.6 0.7
TRANSP WIND DIR.S S SSE SSE SSE S S SSW SSW WSW WSW W
TRANSP WIND SPD.20 22 21 21 22 23 23 23 21 18 16 16
SMOKE DISPERSAL.EX GD FR FR PR FR FR FR FR PR PR PR
TUESDAY
MAX TEMPERATURE.....AROUND 74.
MIN HUMIDITY........22 PERCENT.
TIME (CDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY COVER.......PC PC PC MCR MCR MCR MCR MCR CLR CLR CLR CLR
SKY (%).........44 39 29 18 8 7 7 6 5 4 3 3
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CHC OF PCPN (%).10 0 0 0 0 0 0 0 0 0 0 0
CHC OF THDR (%).20 0 0 0 0 0 0 0 0 0 0 0
TEMP............53 53 56 60 64 67 70 72 73 73 73 73
DEWPOINT........42 41 40 40 39 38 36 35 34 33 33 32
RH..............66 64 55 47 40 34 29 26 24 23 23 22
20 FT WIND DIR..NW NNW NNW NW NW NW NW NW NW NW NW NW
20 FT WIND SPD..13 14 16 18 21 23 25 28 29 29 29 29
20 FT WIND GUST.22 23 25 28 30 32 35 37 38 39 39 39
MIX HGT (KFT)...0.8 0.9 1.9 2.9 3.9 5.1 6.2 7.4 7.9 8.4 8.9 8.4
TRANSP WIND DIR.NW NNW NNW NNW NW NW NW NW NW NW NW NW
TRANSP WIND SPD.17 18 21 24 26 28 29 30 31 32 32 32
SMOKE DISPERSAL.PR FR GD GD EX EX EX EX EX EX EX EX
FORECASTER...MEYERS
REQUESTED BY...KENN PERREAULT
TYPE OF REQUEST...PRESCRIBED
.TAG 2613069.2/FSD
.DELDT 05/10/26
.FORMATTERVERSION 2.0.0
.EMAIL KENN_PERREAULT@NPS.GOV,DAN_SWANSON@NPS.GOV
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