282
FNUS73 KFSD 111108
FWSFSD
SPOT FORECAST FOR PIPE UNIT 1 AND 3...NPS
NATIONAL WEATHER SERVICE SIOUX FALLS SD
608 AM CDT MON MAY 11 2026
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
WINDS WILL GRADUALLY INCREASE FROM THE SOUTHEAST THROUGH THE
DAY AND BECOME MORE SOUTHERLY LATE AFTERNOON. CARE SHOULD BE
TAKEN IN AREAS WITH WARM SEASON FUELS THAT ARE STILL FAIRLY
CURED AS WIND GUSTS AROUND 25 MPH AND RELATIVE HUMIDITY OF
25 TO 30 PERCENT COULD ALLOW FOR A QUICKER THAN EXPECTED
SPREAD.
REST OF TODAY
MAX TEMPERATURE.....AROUND 75.
MIN HUMIDITY........24 PERCENT.
TIME (CDT) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY COVER.......MCR MCR MCR PC MCR PC MC MC PC
SKY (%).........13 16 19 30 25 35 54 61 45
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............52 56 60 64 67 70 72 73 75
DEWPOINT........25 26 28 29 31 32 34 36 37
RH..............35 31 29 27 26 24 25 26 25
20 FT WIND DIR..SSE SSE SSE SSE SSE SSE S S S
20 FT WIND SPD..8 10 12 13 15 16 17 18 20
20 FT WIND GUST.13 15 18 21 22 23 25 28 28
MIX HGT (KFT)...1.4 2.3 2.8 3.2 3.7 4.1 4.4 4.4 4.3
TRANSP WIND DIR.S S S S S S S S S
TRANSP WIND SPD.14 14 14 15 17 18 20 22 24
SMOKE DISPERSAL.FR FR GD GD GD EX EX EX EX
TONIGHT
MIN TEMPERATURE.....AROUND 53.
MAX HUMIDITY........64 PERCENT.
TIME (CDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY COVER.......MC MC MC MC MC MC MC MC MC MC MC MC
SKY (%).........56 53 63 64 70 58 56 64 61 60 55 72
WEATHER COV..... SCH SCH SCH
WEATHER TYPE.... RW RW RW
TSTM COV........
CHC OF PCPN (%).0 0 0 0 0 10 10 20 20 20 10 10
CHC OF THDR (%).0 0 0 0 0 10 10 10 10 10 0 0
TEMP............74 74 72 67 65 64 64 63 62 60 58 56
DEWPOINT........39 40 40 40 40 41 41 42 42 43 43 43
RH..............28 29 31 37 40 43 43 46 48 53 57 62
20 FT WIND DIR..S S SSE SSE SSE SSE S S SSW SSW SW W
20 FT WIND SPD..20 17 17 18 18 18 18 18 16 15 13 13
20 FT WIND GUST.26 25 26 28 28 28 29 29 25 24 21 21
MIX HGT (KFT)...3.9 2.8 0.9 0.7 0.6 0.7 0.7 0.8 0.6 0.6 0.6 0.6
TRANSP WIND DIR.S S SSE SSE SSE S S S SSW SSW WSW W
TRANSP WIND SPD.25 25 21 22 24 25 25 23 23 21 16 17
SMOKE DISPERSAL.EX EX FR FR FR FR FR FR PR PR PR PR
TUESDAY
MAX TEMPERATURE.....AROUND 73.
MIN HUMIDITY........23 PERCENT.
TIME (CDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY COVER.......MC MC MC MCR MCR CLR CLR CLR CLR CLR MCR MCR
SKY (%).........75 67 53 15 8 2 1 2 2 3 6 8
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CHC OF PCPN (%).10 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............55 53 55 59 64 68 70 71 72 73 72 73
DEWPOINT........42 41 41 40 39 37 36 35 34 33 33 33
RH..............61 64 59 49 40 32 29 27 25 23 24 23
20 FT WIND DIR..NW NW NNW NNW NW NW NW NW NW NW NW NW
20 FT WIND SPD..13 13 15 18 21 24 25 26 28 28 26 26
20 FT WIND GUST.21 23 24 28 30 33 35 36 37 37 36 37
MIX HGT (KFT)...0.8 0.9 2.1 2.9 3.9 5.0 6.1 7.0 7.9 8.1 8.6 8.6
TRANSP WIND DIR.NW NNW NNW NNW NW NW NW NW NW NW NW NW
TRANSP WIND SPD.20 23 25 28 29 31 31 32 31 32 35 32
SMOKE DISPERSAL.PR FR GD EX EX EX EX EX EX EX EX EX
FORECASTER...WEISSER
REQUESTED BY...KENN PERREAULT
TYPE OF REQUEST...PRESCRIBED
.TAG 2613069.3/FSD
.DELDT 05/11/26
.FORMATTERVERSION 2.0.0
.EMAIL DAN_SWANSON@NPS.GOV,KENN_PERREAULT@NPS.GOV
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