690
FNUS73 KFSD 181923
FWSFSD
SPOT FORECAST FOR LAKE FIRE...USWFS-YANKTON AGENCY
NATIONAL WEATHER SERVICE SIOUX FALLS SD
223 PM CDT SAT APR 18 2026
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
STRONG NORTHWEST WINDS GUSTING TO 35 MPH AT TIMES AND VERY DRY CONDITIONS
WILL PERSIST THROUGH SUNSET, WITH WINDS EXPECTED TO DROP OFF TO 10 TO 15
MPH AFTER SUNSET AT LIKELY TURN A TOUCH MORE SOUTHWEST. SUNDAY MORNING
WILL SEE WINDS TURN MORE NORTHERLY WITH SPEEDS OF 10 TO 15 MPH COMMON
THROUGH THE DAY.
REST OF TODAY
MAX TEMPERATURE.....AROUND 50.
MIN HUMIDITY........21 PERCENT.
TIME (CDT) 3PM 4PM 5PM
SKY COVER.......PC PC PC
SKY (%).........27 31 36
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CHC OF PCPN (%).10 10 0
CHC OF THDR (%).0 0 0
TEMP............49 50 50
DEWPOINT........14 13 12
RH..............24 22 21
20 FT WIND DIR..WNW NW NW
20 FT WIND SPD..25 25 25
20 FT WIND GUST.36 35 35
MIX HGT (KFT)...10 11 11
TRANSP WIND DIR.NW NW NW
TRANSP WIND SPD.37 38 37
SMOKE DISPERSAL.EX EX EX
TONIGHT
MIN TEMPERATURE.....AROUND 30.
MAX HUMIDITY........66 PERCENT.
TIME (CDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY COVER.......MCR MCR MCR MCR MCR MCR MCR PC PC PC PC MCR
SKY (%).........24 16 18 18 18 21 24 36 32 38 27 24
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............50 50 47 42 40 39 37 37 37 36 34 34
DEWPOINT........12 12 12 12 16 16 16 16 17 18 19 20
RH..............21 21 24 29 37 39 42 42 44 47 54 56
20 FT WIND DIR..NW NW NW WNW WSW SW SW SW WSW WSW W W
20 FT WIND SPD..23 21 17 14 9 9 9 9 9 9 9 9
20 FT WIND GUST.33 30 24 20 13 12 12 12 12 13 13 13
MIX HGT (KFT)...10 7.9 0.7 0.6 0.5 0.4 0.4 0.4 0.4 0.5 0.5 0.4
TRANSP WIND DIR.NW NW NW WNW W WSW SW SW WSW WSW W W
TRANSP WIND SPD.36 32 16 13 9 9 9 13 15 16 15 14
SMOKE DISPERSAL.EX EX PR PR PR PR PR PR PR PR PR PR
SUNDAY
MAX TEMPERATURE.....AROUND 57.
MIN HUMIDITY........28 PERCENT.
TIME (CDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY COVER.......MCR PC PC PC PC MCR MCR MCR MCR MCR MCR MCR
SKY (%).........18 31 33 38 32 25 22 18 15 13 12 8
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............34 31 34 37 43 46 49 51 55 56 57 57
DEWPOINT........21 21 23 25 26 26 25 25 26 25 25 24
RH..............58 66 64 61 51 45 39 36 32 30 29 28
20 FT WIND DIR..WNW NW NNW N N N N N N N N N
20 FT WIND SPD..8 8 8 9 10 10 10 10 10 10 10 9
20 FT WIND GUST.12 12 12 13 14 15 15 15 15 15 14 14
MIX HGT (KFT)...0.4 0.4 0.6 1.8 2.4 3.2 3.9 4.5 4.7 5.1 5.2 5.2
TRANSP WIND DIR.WNW NNW N N N N N NNW NNW NNW NNW NNW
TRANSP WIND SPD.13 10 10 16 16 15 15 14 14 14 12 10
SMOKE DISPERSAL.PR PR PR FR GD GD GD GD GD EX GD GD
FORECASTER...WEISSER
REQUESTED BY...DUWAYNE TRAVERSIE
TYPE OF REQUEST...WILDFIRE
.TAG 2610682.0/FSD
.DELDT 04/18/26
.FORMATTERVERSION 2.0.0
.EMAIL DUWAYNE.TRAVERSIE@BIA.GOV
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