795
FNUS73 KFSD 121125
FWSFSD
SPOT FORECAST FOR PIPE UNIT 1 AND 3...NPS
NATIONAL WEATHER SERVICE SIOUX FALLS SD
625 AM CDT TUE MAY 12 2026
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 9 PM CDT THIS
EVENING...
DISCUSSION
CRITICAL FIRE WEATHER CONDITIONS ARE EXPECTED THIS AFTERNOON AS WINDS
INCREASE WITH GUSTS AROUND 40 MPH LIKELY. THE RELATIVE HUMIDITY
WILL ALSO DROP TO LESS THAN 25 PERCENT IN THE AFTERNOON.
REST OF TODAY
MAX TEMPERATURE.....AROUND 73.
MIN HUMIDITY........23 PERCENT.
TIME (CDT) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY COVER.......MCR CLR CLR CLR MCR MCR MCR CLR CLR
SKY (%).........9 2 0 3 6 6 6 2 2
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 0 0 0 0 0
TEMP............63 65 68 70 71 72 72 72 73
DEWPOINT........41 40 40 37 37 35 33 33 33
RH..............44 40 36 30 29 26 24 24 23
20 FT WIND DIR..NW NW NW NW NW NW NW NW NW
20 FT WIND SPD..20 22 23 24 28 30 31 29 28
20 FT WIND GUST.31 31 36 38 39 38 39 37 37
MIX HGT (KFT)...2.6 3.8 5.1 6.3 7.0 7.9 8.1 8.0 7.9
TRANSP WIND DIR.NW NW NW NW NW NW NW NW NW
TRANSP WIND SPD.29 31 33 35 37 38 37 37 37
SMOKE DISPERSAL.EX EX EX EX EX EX EX EX EX
TONIGHT
MIN TEMPERATURE.....AROUND 42.
MAX HUMIDITY........76 PERCENT.
TIME (CDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY COVER.......CLR CLR MCR MCR MCR MCR MCR MCR MCR MCR MCR MCR
SKY (%).........1 5 9 12 14 24 15 8 10 7 6 10
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............71 70 67 60 57 55 53 51 49 46 44 44
DEWPOINT........32 32 33 33 34 34 34 34 34 34 34 35
RH..............24 24 28 36 42 45 48 52 56 63 68 70
20 FT WIND DIR..NNW NNW NNW NNW NNW NNW NNW NNW NNW NW NW NW
20 FT WIND SPD..26 24 18 14 10 9 7 7 6 5 5 3
20 FT WIND GUST.36 33 28 23 18 16 13 12 9 8 8 7
MIX HGT (KFT)...7.8 7.6 2.1 0.8 0.6 0.5 0.5 0.5 0.4 0.4 0.4 0.4
TRANSP WIND DIR.NNW NNW NNW NNW N N N N N N NNW N
TRANSP WIND SPD.37 36 23 17 14 13 13 12 12 10 9 9
SMOKE DISPERSAL.EX EX GD PR PR PR PR PR PR PR PR PR
WEDNESDAY
MAX TEMPERATURE.....AROUND 76.
MIN HUMIDITY........21 PERCENT.
TIME (CDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY COVER.......MCR MCR MCR CLR CLR CLR CLR CLR CLR MCR MCR MCR
SKY (%).........9 10 7 4 3 1 1 2 5 18 25 23
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............42 44 48 53 62 66 69 72 74 74 75 76
DEWPOINT........35 35 36 37 36 36 36 35 34 34 33 33
RH..............76 70 63 54 38 33 30 26 23 23 21 21
20 FT WIND DIR..NW NNW NW N NNW NNW NNW NNW NNW NNW NNW NNW
20 FT WIND SPD..3 3 3 3 5 5 6 7 6 6 7 7
20 FT WIND GUST.6 6 6 6 7 9 12 13 13 12 12 10
MIX HGT (KFT)...0.4 0.4 0.9 1.9 3.1 5.5 6.8 7.8 8.1 8.6 8.7 8.6
TRANSP WIND DIR.NNW N NNW NNW NNW NNW NNW NNW NNW NNW NNW NW
TRANSP WIND SPD.8 8 9 12 13 16 16 15 14 14 13 13
SMOKE DISPERSAL.PR PR PR FR GD EX EX EX EX EX EX EX
FORECASTER...WEISSER
REQUESTED BY...KENN PERREAULT
TYPE OF REQUEST...PRESCRIBED
.TAG 2613069.4/FSD
.DELDT 05/12/26
.FORMATTERVERSION 2.0.0
.EMAIL KENN_PERREAULT@NPS.GOV,DAN_SWANSON@NPS.GOV
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