171
FNUS73 KUNR 162350
FWSUNR
SPOT FORECAST FOR DEADWOOD FUELS...USFS
NATIONAL WEATHER SERVICE RAPID CITY SD
450 PM MST TUE DEC 16 2025
FORECAST IS BASED ON IGNITION TIME OF 1700 MST ON DECEMBER 16.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
...HIGH WIND WARNING IN EFFECT FROM 2 PM WEDNESDAY TO 8 AM MST
THURSDAY...
DISCUSSION
WINDS WILL INCREASE OVERNIGHT INTO WEDNESDAY MORNING
FROM THE SOUTHWEST, WITH GUSTS TO 30 MPH BY DAYBREAK. WINDS WILL
CONTINUE TO STRENGTHEN THROUGH WEDNESDAY MORNING AND PERSIST
THROUGH THE AFTERNOON, GUSTING TO 45 MPH. A VERY STRONG COLD FRONT
WILL SHIFT THE WINDS TO THE NORTHWEST IN THE MID TO LATE
AFTERNOON. ELEVATED FIRE WEATHER CONDITIONS ARE EXPECTED. RAIN
SHOWERS WILL DEVELOP AHEAD OF THE FRONT, THEN CHANGE TO SNOW
BEHIND THE FRONT AS COLDER AIR PUSHES IN. SNOW IS EXPECTED TO
CONTINUE THROUGH WEDNESDAY NIGHT, WITH UP TO TWO INCHES OF
ACCUMULATION.
REST OF TODAY
SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT).
MAX TEMPERATURE.....AROUND 57.
MIN HUMIDITY........28 PERCENT.
WIND (20 FT)........WEST WINDS AROUND 10 MPH WITH GUSTS TO AROUND
20 MPH.
CWR.................0 PERCENT.
MIXING HEIGHT.......1700 TO 2200 FT AGL.
TRANSPORT WINDS.....WEST AROUND 25 MPH.
SMOKE DISPERSAL.....FAIR.
TIME (MST) 5PM
SKY (%).........32
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0
TEMP............43
RH..............57
20 FT WIND DIR..W
20 FT WIND SPD..7
20 FT WIND GUST.20
MIX HGT (KFT)...2.2
TRANSP WIND DIR.W
TRANSP WIND SPD.22
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR (20-30 PERCENT) THEN BECOMING
MOSTLY CLOUDY (55-65 PERCENT) THEN BECOMING
PARTLY CLOUDY (35-45 PERCENT).
MIN TEMPERATURE.....AROUND 37.
MAX HUMIDITY........57 PERCENT.
WIND (20 FT)........WEST WINDS 10 TO 15 MPH SHIFTING TO THE
SOUTHWEST 15 TO 20 MPH AFTER 3 AM. GUSTS UP TO
26 MPH EARLY IN THE MORNING.
CWR.................0 PERCENT.
MIXING HEIGHT.......400 TO 900 FT AGL.
TRANSPORT WINDS.....WEST AROUND 20 MPH INCREASING TO SOUTHWEST
AROUND 35 MPH.
SMOKE DISPERSAL.....POOR.
TIME (MST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........18 20 31 24 51 68 49 27 28 37 32 30
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............38 37 38 38 39 39 40 39 39 39 39 40
RH..............67 63 54 57 54 54 52 54 52 52 50 48
20 FT WIND DIR..W W W W SW SW SW SW SW SW SW SW
20 FT WIND SPD..9 9 9 9 9 9 10 12 13 14 15 16
20 FT WIND GUST.18 17 16 17 17 17 18 21 22 23 25 26
MIX HGT (KFT)...1.6 1.0 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4
TRANSP WIND DIR.W W W W SW SW SW SW SW SW SW SW
TRANSP WIND SPD.20 18 18 20 20 21 21 22 23 25 28 31
WEDNESDAY
SKY/WEATHER.........PARTLY SUNNY (50-60 PERCENT). CHANCE OF RAIN
LATE IN THE MORNING. RAIN LIKELY EARLY IN THE
AFTERNOON, THEN SNOW LIKELY LATE IN THE
AFTERNOON.
MAX TEMPERATURE.....AROUND 51.
MIN HUMIDITY........43 PERCENT.
WIND (20 FT)........WINDY. SOUTHWEST WINDS 20 TO 30 MPH WITH GUSTS
TO AROUND 40 MPH SHIFTING TO THE WEST AROUND 30
MPH WITH GUSTS TO AROUND 45 MPH IN THE
AFTERNOON.
CWR.................50 PERCENT.
MIXING HEIGHT.......4100 TO 4600 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 35 TO 40 MPH INCREASING TO 50 TO 55
MPH LATE IN THE MORNING, THEN SHIFTING TO THE
WEST 60 TO 65 MPH LATE IN THE MORNING SHIFTING
TO THE NORTHWEST LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....GOOD INCREASING TO EXCELLENT.
TIME (MST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........60 71 63 66 57 44 37 36 37 74 73 73
WEATHER COV..... CHC CHC CHC LKY LKY LKY LKY
WEATHER TYPE.... RN RN RN RN RN SN SN
TSTM COV........
CWR.............50 50 50 50 50 50 50 50 50 50 50 50
TEMP............41 43 46 47 48 49 50 51 50 46 40 36
RH..............50 47 43 45 44 44 44 44 46 53 70 67
20 FT WIND DIR..SW SW SW SW SW SW SW W W W W W
20 FT WIND SPD..18 20 22 23 23 24 26 29 30 30 30 30
20 FT WIND GUST.30 32 35 37 38 39 38 40 45 45 45 41
MIX HGT (KFT)...0.5 0.5 0.6 0.8 1.1 1.4 2.3 3.1 3.9 4.2 4.4 4.6
TRANSP WIND DIR.SW SW SW SW SW SW SW W W W W NW
TRANSP WIND SPD.32 35 39 46 54 61 61 59 58 59 61 64
FORECASTER...13
REQUESTED BY...BLANE NELSON
TYPE OF REQUEST...PRESCRIBED
.TAG 2527846.0/UNR
.DELDT 12/16/25
.FORMATTERVERSION 2.0.0
.EMAIL BLANE.NELSON@USDA.GOV
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