383
FNUS73 KUNR 192028
FWSUNR
SPOT FORECAST FOR GREYHOUND...GREAT PLAINS DISPATCH
NATIONAL WEATHER SERVICE RAPID CITY SD
128 PM MST FRI DEC 19 2025
FORECAST IS BASED ON FORECAST START TIME OF 1400 MST ON DECEMBER 19.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
WARMER TEMPERATURES AND GUSTY WESTERLY WINDS HAVE
MOVED IN THIS AFTERNOON, FOLLOWING A WARM FRONTAL PASSAGE. THESE
WINDS WILL DIMINISH LATE AFTERNOON. EXPECT THE CALMER WINDS TO BE
SHORT LIVED THOUGH, AS A COLD FRONT IS EXPECTED TO DROP DOWN
THROUGH THE REGION THIS EVENING. FRONTAL PASSAGE OVER THE SPOT
LOCATION IS EXPECTED BETWEEN 5-8 PM MST, CAUSING A WIND SHIFT TO
OUT OF THE NORTHWEST. LIGHT RAIN/SNOW WILL BE POSSIBLE BEHIND THE
FRONT TONIGHT WITH LITTLE TO NO ACCUMULATIONS EXPECTED OVER THE
SPOT AREA. COOLER WEATHER IS EXPECTED SATURDAY WITH A BUMP IN
TEMPERATURES FOR SUNDAY. ONCE ANY PRECIPITATION MOVES OUT TONIGHT
(EARLY OVERNIGHT), EXPECT DRY CONDITIONS THE REMAINDER OF THE
WEEKEND.
REST OF TODAY
SKY/WEATHER.........PARTLY SUNNY (45-55 PERCENT).
MAX TEMPERATURE.....AROUND 58.
MIN HUMIDITY........27 PERCENT.
WIND (20 FT)........WEST WINDS 10 TO 15 MPH WITH GUSTS TO AROUND 30
MPH.
CWR.................0 PERCENT.
MIXING HEIGHT.......3000 TO 3500 FT AGL.
TRANSPORT WINDS.....WEST 40 TO 50 MPH.
SMOKE DISPERSAL.....EXCELLENT DECREASING TO FAIR LATE IN THE
AFTERNOON.
TIME (MST) 2PM 3PM 4PM 5PM
SKY (%).........42 45 55 59
WEATHER COV..... SCH
WEATHER TYPE.... RN
TSTM COV........
CWR.............0 0 0 0
TEMP............57 56 54 53
RH..............27 29 31 35
20 FT WIND DIR..W W W W
20 FT WIND SPD..18 18 17 16
20 FT WIND GUST.44 43 40 38
MIX HGT (KFT)...3.5 1.5 1.1 0.9
TRANSP WIND DIR.W W W W
TRANSP WIND SPD.49 47 44 40
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (55-65 PERCENT) THEN BECOMING
PARTLY CLOUDY (40-50 PERCENT) THEN BECOMING
MOSTLY CLOUDY (60-70 PERCENT) THEN BECOMING
PARTLY CLOUDY (35-45 PERCENT). SLIGHT CHANCE OF
SNOW IN THE EVENING AND OVERNIGHT.
MIN TEMPERATURE.....AROUND 26.
MAX HUMIDITY........69 PERCENT.
WIND (20 FT)........WEST WINDS AROUND 15 MPH WITH GUSTS TO AROUND
25 MPH SHIFTING TO THE NORTHWEST 5 TO 15 MPH
WITH GUSTS TO AROUND 25 MPH EARLY IN THE
EVENING.
CWR.................0 PERCENT.
MIXING HEIGHT.......500 TO 1000 FT AGL.
TRANSPORT WINDS.....WEST 30 TO 35 MPH SHIFTING TO THE NORTHWEST 25
TO 35 MPH EARLY IN THE EVENING, THEN INCREASING
TO 30 TO 40 MPH LATE IN THE EVENING DECREASING
TO AROUND 25 MPH AFTER 3 AM.
SMOKE DISPERSAL.....POOR.
TIME (MST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........59 63 45 56 64 76 74 68 48 43 38 32
WEATHER COV.....SCH SCH SCH SCH SCH SCH SCH SCH
WEATHER TYPE....RN SN SN SN SN SN SN SN
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............51 48 45 41 38 34 33 30 26 26 26 26
RH..............40 45 51 57 65 69 63 63 68 62 57 52
20 FT WIND DIR..W NW NW NW NW NW NW NW NW NW NW NW
20 FT WIND SPD..14 13 13 13 13 12 10 10 9 8 7 6
20 FT WIND GUST.38 32 29 29 29 29 28 28 25 24 21 20
MIX HGT (KFT)...0.8 0.6 0.6 1.0 1.3 1.9 2.1 2.0 1.4 1.1 0.9 0.6
TRANSP WIND DIR.W W NW NW NW NW NW NW NW NW NW NW
TRANSP WIND SPD.35 28 25 28 33 37 37 35 31 28 24 23
SATURDAY
SKY/WEATHER.........SUNNY (15-25 PERCENT).
MAX TEMPERATURE.....AROUND 38.
MIN HUMIDITY........31 PERCENT.
WIND (20 FT)........WEST WINDS 5 TO 10 MPH DECREASING TO AROUND 5
MPH LATE IN THE AFTERNOON. GUSTS UP TO 25 MPH
DECREASING TO 13 MPH LATE IN THE AFTERNOON.
CWR.................0 PERCENT.
MIXING HEIGHT.......5700 TO 6200 FT AGL.
TRANSPORT WINDS.....WEST 25 TO 35 MPH SHIFTING TO THE NORTHWEST 35
TO 40 MPH IN THE LATE MORNING AND EARLY
AFTERNOON, THEN BECOMING WEST 25 TO 30 MPH LATE
IN THE AFTERNOON DECREASING TO AROUND 15 MPH
LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....VERY GOOD INCREASING TO EXCELLENT LATE IN THE
MORNING, THEN DECREASING TO FAIR LATE IN THE
AFTERNOON.
TIME (MST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........31 30 25 25 22 18 17 15 14 14 13 13
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............28 27 27 32 34 36 37 38 38 36 34 31
RH..............49 48 53 43 37 33 32 31 32 34 38 42
20 FT WIND DIR..W W W W NW NW NW W W W W W
20 FT WIND SPD..6 6 7 8 9 10 10 10 9 7 5 3
20 FT WIND GUST.20 18 20 21 23 24 25 24 23 20 16 13
MIX HGT (KFT)...0.7 0.9 1.0 2.3 3.5 4.7 5.2 5.7 6.2 4.4 2.7 0.9
TRANSP WIND DIR.NW W W W W NW NW W W W W W
TRANSP WIND SPD.23 26 29 32 37 38 38 37 33 28 21 15
FORECASTER...AD
REQUESTED BY...LYDIA RADERSCHADT
TYPE OF REQUEST...WILDFIRE
.TAG 2527966.0/UNR
.DELDT 12/19/25
.FORMATTERVERSION 2.0.0
.EMAIL SDGPC@FIRENET.GOV
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