585
FNUS73 KUNR 091046
FWSUNR
SPOT FORECAST FOR 18 MILE RX...USFS
NATIONAL WEATHER SERVICE RAPID CITY SD
446 AM MDT FRI MAY 9 2025
FORECAST IS BASED ON IGNITION TIME OF 0800 MDT ON MAY 09.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION...
THUNDERSTORMS MAY OCCUR THIS AFTERNOON WITH GUSTY ERRATIC WINDS.
EXPECT FAIR RELATIVE HUMIDITY RECOVERY TONIGHT. DRIER AND WARMER
WEATHER IS EXPECTED SATURDAY WITH DEEP MIXING RESULTING IN GUSTY
SOUTHERLY AFTERNOON WINDS.
LOOKING AHEAD, UNSEASONABLY WARM WEATHER IS EXPECTED WITH HIGHS
IN THE 80S SUNDAY AND MONDAY AS RELATIVE HUMIDITIES DROP TO THE
TEENS. TUESDAY WILL BE A BIT COOLER, BUT MINIMUM RELATIVE
HUMIDITIES IN THE TEENS ARE STILL EXPECTED. SUNDAY THROUGH
TUESDAY, GUSTY AFTERNOON WINDS WILL OCCUR DUE TO DEEP MIXING.
WEDNESDAY LOOKS COOLER BEHIND A COLD FRONT WITH HIGHS IN THE 60S
AND MINIMUM RELATIVE HUMIDITIES IN THE 20S/30S, DEPENDING ON HOW
MUCH PRECIPITATION FALLS. THE 25TH TO 75TH PERCENTILE
PRECIPITATION FORECAST FOR WEDNESDAY IS 0-0.4" AS AN UNSETTLED
WEATHER PATTERN DEVELOPS DUE TO AN UPPER LEVEL TROUGH STALLING
OVER THE NORTHERN PLAINS.
TODAY
SKY/WEATHER.........MOSTLY SUNNY (40-50 PERCENT). CHANCE OF SHOWERS
AND THUNDERSTORMS IN THE AFTERNOON.
MAX TEMPERATURE.....AROUND 75.
MIN HUMIDITY........29 PERCENT.
WIND (20 FT)........NORTHEAST WINDS 5 TO 10 MPH SHIFTING TO THE
EAST WITH GUSTS AROUND 15 MPH LATE IN THE
MORNING. GUSTY AND ERRATIC WINDS EXPECTED NEAR
THUNDERSTORMS IN THE AFTERNOON.
CWR.................30 PERCENT.
MIXING HEIGHT.......10200 TO 10700 FT AGL.
TRANSPORT WINDS.....NORTHEAST 10 TO 20 MPH.
SMOKE DISPERSAL.....VERY GOOD INCREASING TO EXCELLENT LATE IN THE
AFTERNOON.
TIME (MDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........30 21 33 45 57 60 63 65 64 62
WEATHER COV..... CHC CHC CHC CHC SCH SCH
WEATHER TYPE.... RW RW RW RW RW RW
TSTM COV........ CHC CHC CHC CHC SCH SCH
CWR.............30 30 30 30 30 30 30 30 30 30
TEMP............54 60 65 70 71 72 73 74 74 72
RH..............57 48 40 34 34 33 33 30 29 31
20 FT WIND DIR..NE NE E E E E NE NE NE E
20 FT WIND SPD..5 6 6 7 8 9 10 10 9 8
20 FT WIND GUST.9 9 10 12 14 14 16 16 15 14
MIX HGT (KFT)...3.6 5.2 6.4 7.7 9.0 9.6 10 11 9.4 8.1
TRANSP WIND DIR.NE NE NE E E E NE NE NE NE
TRANSP WIND SPD.9 9 10 12 13 15 17 17 17 15
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (55-65 PERCENT) THEN BECOMING
MOSTLY CLEAR (20-30 PERCENT). SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS EARLY IN THE EVENING.
MIN TEMPERATURE.....AROUND 48.
MAX HUMIDITY........63 PERCENT.
WIND (20 FT)........NORTHEAST WINDS 5 TO 10 MPH WITH GUSTS TO
AROUND 15 MPH DECREASING TO AROUND 5 MPH
OVERNIGHT. GUSTY AND ERRATIC WINDS EXPECTED
NEAR THUNDERSTORMS EARLY IN THE EVENING.
CWR.................0 PERCENT.
MIXING HEIGHT.......400 TO 900 FT AGL.
TRANSPORT WINDS.....NORTHEAST 10 TO 15 MPH SHIFTING TO THE EAST
LATE IN THE EVENING.
SMOKE DISPERSAL.....POOR.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........60 44 27 10 9 8 8 6 5 4 5 6
WEATHER COV.....SCH
WEATHER TYPE....RW
TSTM COV........SCH
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............70 67 63 59 57 56 55 54 53 52 50 50
RH..............34 37 41 47 51 53 55 55 59 61 63 63
20 FT WIND DIR..E E NE NE NE E E E NE NE NE NE
20 FT WIND SPD..7 6 5 5 5 5 5 3 3 2 2 2
20 FT WIND GUST.14 12 10 9 9 8 7 6 6 6 5 5
MIX HGT (KFT)...6.8 4.7 2.6 0.5 0.5 0.5 0.5 0.5 0.5 0.4 0.5 0.5
TRANSP WIND DIR.NE NE NE E E E E E E NE E E
TRANSP WIND SPD.13 12 9 8 8 7 7 8 8 8 8 7
SATURDAY
SKY/WEATHER.........SUNNY (0-10 PERCENT).
MAX TEMPERATURE.....AROUND 81.
MIN HUMIDITY........17 PERCENT.
WIND (20 FT)........EAST WINDS AROUND 5 MPH SHIFTING TO THE
TO THE SOUTHWEST 5 TO 15 MPH WITH GUSTS TO AROUND
25 MPH IN THE LATE MORNING AND AFTERNOON.
CWR.................0 PERCENT.
MIXING HEIGHT.......9000 TO 9500 FT AGL INCREASING TO 11400 TO
11900 FT AGL LATE IN THE AFTERNOON.
TRANSPORT WINDS.....EAST AROUND 10 MPH SHIFTING TO THE SOUTH 10 TO
20 MPH EARLY IN THE MORNING, THEN INCREASING TO
SOUTHWEST 20 TO 25 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....GOOD INCREASING TO EXCELLENT IN THE AFTERNOON.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........6 6 5 4 4 4 4 3 3 3 3 4
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............52 56 61 66 70 72 74 77 79 80 81 80
RH..............61 55 48 40 34 30 27 23 20 18 17 17
20 FT WIND DIR..NE E SE S S SW SW SW SW SW SW SW
20 FT WIND SPD..2 2 3 5 7 9 12 13 14 14 14 13
20 FT WIND GUST.5 6 8 10 14 17 21 22 23 23 23 22
MIX HGT (KFT)...0.5 0.8 1.2 1.5 3.8 6.0 8.3 9.5 11 12 11 10
TRANSP WIND DIR.E E S S S SW SW SW SW SW SW SW
TRANSP WIND SPD.7 7 9 10 14 17 20 21 22 22 22 21
FORECASTER...EH
REQUESTED BY...HAYDEN HOELSCHER
TYPE OF REQUEST...PRESCRIBED
.TAG 2513552.0/UNR
.DELDT 05/09/25
.FORMATTERVERSION 2.0.0
.EMAIL CHRISTOPHER.BENNETT@USDA.GOV,BRICE.STANTON@USDA.GOV,HAYDEN.HOELSCHER@USDA.GOV,TODD.HOOVER@USDA.GOV
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