440
FNUS73 KFSD 192014
FWSFSD
SPOT FORECAST FOR LAKE FIRE...BIA
NATIONAL WEATHER SERVICE SIOUX FALLS SD
314 PM CDT SUN APR 19 2026
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
DRY AND WARM WEATHER IS EXPECTED MONDAY THROUGH WEDNESDAY WITH NEAR
CRITICAL FIRE WEATHER CONDITIONS EXPECTED MONDAY AND AGAIN
WEDNESDAY. WEDNESDAY WILL ALSO SEE NEAR RECORD WARM HIGHS IN THE
80S AND 90S. A CHANCE FOR SHOWERS AND THUNDERSTORMS RETURNS LATE
WEDNESDAY NIGHT INTO THURSDAY NIGHT BUT FOR NOW THE ACTIVITY LOOKS
TO REMAIN ISOLATED TO SCATTERED, SO THURSDAY MAY ALSO PROVE TO POSE
SOME CONCERNS FOR FIRE WEATHER AS A STRONG COLD FRONT MOVES INTO
THE AREA THURSDAY AFTERNOON. BELOW NORMAL TEMPERATURES AND DRY
CONDITIONS ARE EXPECTED FRIDAY INTO THE WEEKEND.
TONIGHT
MIN TEMPERATURE.....AROUND 32.
MAX HUMIDITY........53 PERCENT.
TIME (CDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY COVER.......MCR MCR MCR MCR MCR MCR MCR CLR CLR CLR CLR MCR
SKY (%).........6 8 13 11 9 8 7 3 4 5 5 6
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............55 54 50 46 43 41 39 37 36 35 34 33
DEWPOINT........22 21 21 19 15 14 13 13 14 15 15 16
RH..............27 27 32 34 32 33 34 37 40 43 45 49
20 FT WIND DIR..NE NE ENE ENE E E E ESE ESE SE SE SE
20 FT WIND SPD..8 8 8 8 9 9 9 9 9 9 9 9
20 FT WIND GUST.13 13 12 13 14 14 14 15 15 16 15 15
MIX HGT (KFT)...4.5 4.0 0.5 0.5 0.4 0.4 0.4 0.4 0.5 0.5 0.5 0.5
TRANSP WIND DIR.N NE ENE ENE E E E E SE SSE SSE SSE
TRANSP WIND SPD.8 9 10 12 12 12 14 14 15 14 14 14
SMOKE DISPERSAL.GD GD PR PR PR PR PR PR PR PR PR PR
MONDAY
MAX TEMPERATURE.....AROUND 78.
MIN HUMIDITY........17 PERCENT.
TIME (CDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY COVER.......CLR MCR MCR MCR MCR MCR PC PC MCR PC PC PC
SKY (%).........4 8 11 9 7 6 33 27 24 37 29 31
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............33 32 36 40 49 54 60 64 70 73 77 77
DEWPOINT........16 17 19 23 24 26 28 30 30 30 31 30
RH..............49 53 50 50 37 34 29 28 22 20 19 18
20 FT WIND DIR..SSE SSE SSE S S S S S S S S S
20 FT WIND SPD..10 10 14 16 18 18 18 18 18 20 18 16
20 FT WIND GUST.16 16 21 23 25 26 28 26 26 26 25 24
MIX HGT (KFT)...0.5 0.5 0.6 1.4 1.9 2.3 2.7 3.0 3.2 3.6 4.1 4.3
TRANSP WIND DIR.SSE S S S S S S S S S SSW SSW
TRANSP WIND SPD.14 13 15 22 24 24 23 22 21 20 21 22
SMOKE DISPERSAL.PR PR PR FR GD GD GD GD GD EX EX EX
MONDAY NIGHT
MIN TEMPERATURE.....AROUND 43.
MAX HUMIDITY........65 PERCENT.
TIME (CDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY COVER.......PC PC PC PC MCR MCR MCR MCR MCR MCR CLR CLR
SKY (%).........37 42 38 28 17 14 12 9 7 6 4 4
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............78 77 73 68 63 59 56 54 51 49 47 44
DEWPOINT........30 29 31 32 33 33 33 34 34 33 33 33
RH..............17 17 21 26 32 37 42 47 52 54 58 65
20 FT WIND DIR..S S S S S SW W WNW WNW WNW WNW NW
20 FT WIND SPD..15 14 13 12 10 9 8 7 6 6 6 6
20 FT WIND GUST.22 21 18 16 15 14 12 10 9 8 8 8
MIX HGT (KFT)...3.8 1.1 0.8 0.7 0.5 0.5 0.4 0.4 0.4 0.3 0.3 0.3
TRANSP WIND DIR.SSW S SSE S S S WSW WNW WNW NW NNW NNW
TRANSP WIND SPD.21 18 17 15 13 10 8 7 6 6 6 6
SMOKE DISPERSAL.EX FR PR PR PR PR PR PR PR PR PR PR
TUESDAY
MAX TEMPERATURE.....AROUND 84.
MIN HUMIDITY........18 PERCENT.
TIME (CDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY COVER.......CLR CLR MCR MCR MCR MCR CLR CLR MCR MCR MCR MCR
SKY (%).........5 5 6 6 7 6 4 3 6 8 11 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............43 44 48 54 61 67 72 77 80 82 83 84
DEWPOINT........32 33 34 36 38 38 38 38 37 37 36 36
RH..............65 65 58 50 42 34 29 24 21 20 19 18
20 FT WIND DIR..NW NW NNW N NNE NNE ENE ENE E E E ESE
20 FT WIND SPD..6 6 6 7 7 7 8 8 9 9 10 10
20 FT WIND GUST.8 8 9 9 10 12 12 13 14 14 15 15
MIX HGT (KFT)...0.3 0.3 0.6 0.8 1.1 2.0 3.0 3.9 4.6 5.2 5.9 4.8
TRANSP WIND DIR.N N N NE NE NE NE NE ENE E ESE ESE
TRANSP WIND SPD.7 7 7 8 8 8 9 9 9 10 10 10
SMOKE DISPERSAL.PR PR PR PR PR FR FR GD GD GD GD GD
FORECASTER...DUX
REQUESTED BY...DUWAYNE TRAVERSIE
TYPE OF REQUEST...WILDFIRE
.TAG 2610682.1/FSD
.DELDT 04/19/26
.FORMATTERVERSION 2.0.0
.EMAIL DUWAYNE.TRAVERSIE@BIA.GOV
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