499
FNUS73 KUNR 131034
FWSUNR
SPOT FORECAST FOR 87 FIRE...USFS
NATIONAL WEATHER SERVICE RAPID CITY SD
434 AM MDT MON APR 13 2026
FORECAST IS BASED ON FORECAST START TIME OF 0600 MDT ON APRIL 13.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
..RED FLAG WARNING IN EFFECT UNTIL 9 PM MDT THIS EVENING
DISCUSSION
UNSEASONABLY WARM AND DRY CONDITIONS WILL CONTINUE
TODAY. THE AFTERNOON RELATIVE HUMIDITY WILL FALL TO AROUND 20
PERCENT. WEST TO SOUTHWEST WINDS WILL INCREASE AFTER DAWN TO 10
TO 15 MPH, GUSTING UP TO 25 MPH. WINDS WILL INCREASE TO 15 TO 20
MPH WITH GUSTS TO AROUND 30 MPH BY LATE MORNING, AND PERSIST INTO
THE EARLY EVENING HOURS, BEFORE DIMINISHING AROUND MID EVENING.
THERE IS A VERY SMALL CHANCE OF A RAIN SHOWER/THUNDERSTORM IN THE
AFTERNOON, WHICH WOULD LIKELY PRODUCE GUSTY AND ERRATIC WINDS AND
VERY LITTLE PRECIPITATION. COOLER AND LESS BREEZY CONDITIONS ARE
EXPECTED ON TUESDAY WITH SLIGHTLY BETTER RH RECOVERY TUESDAY
NIGHT.
TODAY
SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT). SLIGHT CHANCE OF
RAIN SHOWERS EARLY IN THE AFTERNOON.
MAX TEMPERATURE.....AROUND 62.
MIN HUMIDITY........19 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 5 TO 15 MPH SHIFTING TO THE
WEST AROUND 15 MPH WITH GUSTS TO AROUND 30 MPH
IN THE AFTERNOON.
CWR.................0 PERCENT.
MIXING HEIGHT.......8900 TO 9400 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 20 TO 25 MPH INCREASING TO WEST 40 TO
50 MPH.
SMOKE DISPERSAL.....POOR INCREASING TO EXCELLENT.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........41 28 22 18 22 27 31 28 25 22 23 23
WEATHER COV..... SCH SCH
WEATHER TYPE.... RW RW
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............40 40 43 49 56 57 59 61 62 62 61 58
RH..............63 62 53 41 30 28 24 20 20 20 19 19
20 FT WIND DIR..SW SW SW SW SW SW W W W W W W
20 FT WIND SPD..5 5 6 7 9 13 15 15 15 14 13 13
20 FT WIND GUST.6 6 7 10 15 18 22 22 23 25 27 32
MIX HGT (KFT)...0.4 0.4 0.6 3.7 4.7 6.6 7.5 7.6 7.9 9.4 8.0 7.5
TRANSP WIND DIR.SW SW SW SW SW SW SW SW W W W W
TRANSP WIND SPD.16 22 28 33 37 40 44 46 48 49 49 47
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT) THEN BECOMING
MOSTLY CLOUDY (45-55 PERCENT) THEN BECOMING
PARTLY CLOUDY (40-50 PERCENT).
MIN TEMPERATURE.....AROUND 36.
MAX HUMIDITY........46 PERCENT.
WIND (20 FT)........WEST WINDS 15 TO 20 MPH WITH GUSTS TO AROUND 32
MPH DECREASING TO AROUND 5 MPH WITH GUSTS TO
AROUND 16 MPH IN THE LATE EVENING AND
OVERNIGHT.
CWR.................0 PERCENT.
MIXING HEIGHT.......400 TO 900 FT AGL.
TRANSPORT WINDS.....WEST AROUND 45 MPH DECREASING TO AROUND 15 MPH.
SMOKE DISPERSAL.....EXCELLENT DECREASING TO POOR.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........24 20 16 12 15 17 20 17 28 46 51 43
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............55 51 46 44 42 41 40 38 38 38 36 38
RH..............20 24 32 38 39 41 41 44 42 42 45 44
20 FT WIND DIR..W W W W W W W W W W W W
20 FT WIND SPD..12 9 7 6 3 2 2 2 2 2 2 2
20 FT WIND GUST.32 28 23 18 16 13 12 10 10 10 10 10
MIX HGT (KFT)...6.4 3.6 1.0 0.5 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4
TRANSP WIND DIR.W W W NW NW W W W W W W W
TRANSP WIND SPD.43 33 23 15 13 13 14 14 13 13 12 12
TUESDAY
SKY/WEATHER.........PARTLY SUNNY (60-70 PERCENT). CHANCE OF RAIN
SHOWERS IN THE AFTERNOON.
MAX TEMPERATURE.....AROUND 58.
MIN HUMIDITY........26 PERCENT.
WIND (20 FT)........WEST WINDS AROUND 5 MPH SHIFTING TO THE
NORTHWEST LATE IN THE MORNING, THEN SHIFTING TO
THE SOUTHWEST LATE IN THE MORNING SHIFTING TO
THE SOUTH EARLY IN THE AFTERNOON SHIFTING TO
THE SOUTHEAST SHIFTING TO THE NORTHEAST LATE IN
THE AFTERNOON. GUSTS UP TO 16 MPH.
CWR.................10 PERCENT.
MIXING HEIGHT.......7400 TO 7900 FT AGL.
TRANSPORT WINDS.....WEST AROUND 10 MPH SHIFTING TO THE SOUTHWEST
LATE IN THE MORNING.
SMOKE DISPERSAL.....GOOD.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........60 67 65 62 62 62 62 63 64 65 67 69
WEATHER COV..... CHC CHC CHC CHC CHC CHC
WEATHER TYPE.... RW RW RW RW RW RW
TSTM COV........
CWR.............0 0 0 0 0 0 10 10 10 10 10 10
TEMP............38 38 43 48 51 54 56 57 57 57 56 55
RH..............46 46 39 35 32 28 26 27 27 28 30 31
20 FT WIND DIR..W W W NW W SW SW S S S SE NE
20 FT WIND SPD..2 2 2 2 3 3 5 6 6 6 6 5
20 FT WIND GUST.10 10 10 10 12 14 16 16 16 16 16 16
MIX HGT (KFT)...0.4 1.3 2.2 3.1 4.4 5.6 6.9 7.2 7.6 7.9 6.9 5.9
TRANSP WIND DIR.W W W W W SW S S SW SW SW S
TRANSP WIND SPD.10 10 10 10 10 12 13 13 13 13 13 12
FORECASTER...SR
REQUESTED BY...RYAN FLYNN
TYPE OF REQUEST...WILDFIRE
.TAG 2610047.2/UNR
.DELDT 04/13/26
.FORMATTERVERSION 2.0.0
.EMAIL SDGPC@FIRENET.GOV,THOMAS.ROERICK@USDA.GOV,WAYNE.YANDERS@USDA.GOV,JEREMY.DALMAN@USDA.GOV
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