242
FNUS73 KUNR 241255
FWSUNR
SPOT FORECAST FOR LITHOGRAPH RX...NPS
NATIONAL WEATHER SERVICE RAPID CITY SD
655 AM MDT FRI OCT 24 2025
FORECAST IS BASED ON IGNITION TIME OF 0800 MDT ON OCTOBER 25.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
SATURDAY WILL BE WARM AND DRY WITH HIGHS IN THE MID 60S
AND AFTERNOON RHS DROPPING TO 24-29%. LIGHTER, TERRAIN-DRIVEN
WINDS WILL INCREASE AND BECOME SOUTH-SOUTHWESTERLY AFTER 1000-1200
WITH GUSTS UP TO 20 MPH.
WINDS WILL REMAIN ELEVATED OVERNIGHT SATURDAY (SW AT 5-10 MPH,
GUSTING TO 18 MPH) WITH OVERNIGHT RH RECOVERY AROUND 45-50%. WINDS
ON SUNDAY WILL BECOME WESTERLY AT 10 TO 15 MPH, GUSTING UP TO 25
MPH AS A SYSTEM MOVES THROUGH THE AREA. THERE WILL BE A CHANCE FOR
RAIN/SNOW SHOWERS SUNDAY NIGHT (30-40%) WITH WINDS SHIFTING TO
THE NORTHWEST BY MONDAY MORNING. RAIN/SNOW ACCUMULATION WILL BE
MINIMAL (GENERALLY UNDER 0.05" OF LIQUID).
SATURDAY
SKY/WEATHER.........SUNNY (5-15 PERCENT).
MAX TEMPERATURE.....AROUND 65.
MIN HUMIDITY........24-29 PERCENT.
WIND (20 FT)........LIGHT, TERRAIN DRIVEN WINDS IN THE MORNING WILL
SHIFTING TO THE SOUTH-SOUTHWEST WITH GUSTS TO
AROUND 20 MPH AFTER 1000-1200. STRONGEST WINDS ON
EXPOSED, UPPER SLOPES.
CWR.................0 PERCENT.
MIXING HEIGHT.......2700 TO 3200 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 10 TO 20 MPH INCREASING TO AROUND 20
MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....FAIR.
TIME (MDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........5 2 4 5 6 7 9 10 14 19
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0
TEMP............45 49 55 59 61 63 64 64 63 60
RH..............45 42 34 29 27 25 24 24 25 29
20 FT WIND DIR..SE SW SW SW SW SW SW SW S S
20 FT WIND SPD..5 5 6 7 8 9 10 10 9 9
20 FT WIND GUST.9 10 12 14 16 17 20 20 20 18
MIX HGT (KFT)...0.4 0.3 0.9 1.5 2.1 2.5 2.8 3.2 2.3 1.3
TRANSP WIND DIR.SW SW SW SW SW SW SW SW SW S
TRANSP WIND SPD.8 9 10 13 15 16 17 18 17 16
SATURDAY NIGHT
SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT) THEN BECOMING
MOSTLY CLOUDY (55-65 PERCENT).
MIN TEMPERATURE.....AROUND 45.
MAX HUMIDITY........49 PERCENT.
WIND (20 FT)........SOUTH WINDS AROUND 10 MPH SHIFTING TO THE
SOUTHWEST OVERNIGHT. GUSTS UP TO 18 MPH.
CWR.................0 PERCENT.
MIXING HEIGHT.......400 TO 900 FT AGL.
TRANSPORT WINDS.....SOUTH 15 TO 20 MPH.
SMOKE DISPERSAL.....POOR.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........23 26 30 33 34 36 37 42 47 52 58 63
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............58 55 53 51 50 49 48 47 47 47 46 46
RH..............32 35 36 39 42 44 47 47 47 45 47 47
20 FT WIND DIR..S S S S S S S SW SW SW SW W
20 FT WIND SPD..8 8 9 9 9 9 9 9 8 8 7 7
20 FT WIND GUST.17 17 18 18 18 17 17 17 16 16 15 15
MIX HGT (KFT)...0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4
TRANSP WIND DIR.S S S S S S SW SW SW SW SW SW
TRANSP WIND SPD.15 15 16 16 16 16 16 15 15 15 14 13
SUNDAY
SKY/WEATHER.........PARTLY SUNNY (45-55 PERCENT).
MAX TEMPERATURE.....AROUND 60.
MIN HUMIDITY........29 PERCENT.
WIND (20 FT)........WEST WINDS 10 TO 15 MPH. GUSTS UP TO 24 MPH
INCREASING TO 25 MPH IN THE AFTERNOON.
CWR.................0 PERCENT.
MIXING HEIGHT.......7000 TO 7500 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 15 TO 20 MPH INCREASING TO WEST 25 TO
35 MPH LATE IN THE MORNING, THEN INCREASING TO
40 TO 45 MPH EARLY IN THE AFTERNOON DECREASING
TO 25 TO 35 MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....VERY GOOD INCREASING TO EXCELLENT EARLY IN THE
AFTERNOON, THEN DECREASING TO VERY GOOD LATE IN
THE AFTERNOON.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........69 63 58 52 52 53 53 47 41 35 39 44
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............46 47 48 50 53 55 57 59 59 59 57 54
RH..............49 49 49 48 43 40 35 32 30 29 31 35
20 FT WIND DIR..W W W W W W W W W W W W
20 FT WIND SPD..7 8 9 10 12 13 14 14 14 14 13 12
20 FT WIND GUST.15 16 17 20 21 23 24 25 25 25 24 22
MIX HGT (KFT)...0.4 0.7 0.9 1.1 2.3 3.5 4.7 5.6 6.6 7.5 5.1 2.8
TRANSP WIND DIR.SW SW W W W W W W W W W W
TRANSP WIND SPD.13 14 15 18 25 33 39 43 43 39 33 25
FORECASTER...EW
REQUESTED BY...DAN SWANSON
TYPE OF REQUEST...PRESCRIBED
.TAG 2524149.3/UNR
.DELDT 10/24/25
.FORMATTERVERSION 2.0.0
.EMAIL DAN_SWANSON@NPS.GOV,ERIC_ROTHLEUTNER@NPS.GOV
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