443
FNUS73 KUNR 140905
FWSUNR
SPOT FORECAST FOR EMPIRE PL. FIRE...PIEDMONT VFD/PENN CO. FIRE DISPATCH
NATIONAL WEATHER SERVICE RAPID CITY SD
305 AM MDT MON SEP 14 2026
FORECAST IS BASED ON FORECAST START TIME OF 0300 MDT ON SEPTEMBER 14.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
SHOWERS AND THUNDERSTORMS WILL CONTINUE TO MOVE THROUGH
THE AREA THROUGH THE REST OF TONIGHT INTO THE MORNING HOURS.
TOTAL RAINFALL THROUGH THE MORNING WILL BE AROUND 0.05-0.1". MAIN
HAZARDS ASSOCIATED WITH THE STORMS WILL BE LIGHTNING, HEAVY RAINFALL,
AND GUSTY, ERRATIC WINDS.
WINDS OVER THE NEXT SEVERAL HOURS WILL REMAIN OUT OF THE SOUTH-
SOUTHEAST AT 20 TO 25 MPH, GUSTING TO 40 MPH. A FRONT MOVING
THROUGH THE AREA WILL CAUSE WINDS TO SHIFT TO THE NORTHWEST AFTER
8 AM. WINDS WILL REMAIN GUSTY WITH SUSTAINED WINDS OF 20 TO 30
MPH, GUSTING UP TO 40 MPH. CONDITIONS WILL DRY OUT AFTER THE FRONT
PUSHES THROUGH WITH HUMIDITIES DROPPING TO 25 TO 30% IN THE
AFTERNOON. THE DRIER CONDITIONS AND STRONG WINDS WILL LEAD TO
ELEVATED FIRE WEATHER CONCERNS.
REST OF TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (75-85 PERCENT). SHOWERS AND
THUNDERSTORMS LIKELY.
MIN TEMPERATURE.....AROUND 58.
MAX HUMIDITY........94 PERCENT.
WIND (20 FT)........SOUTH WINDS 20 TO 25 MPH WITH GUSTS TO AROUND
40 MPH. GUSTY AND ERRATIC WINDS EXPECTED NEAR
THUNDERSTORMS.
CWR.................50 PERCENT.
MIXING HEIGHT.......700 TO 1200 FT AGL.
TRANSPORT WINDS.....SOUTH 35 TO 40 MPH.
SMOKE DISPERSAL.....POOR.
TIME (MDT) 3AM 4AM 5AM
SKY (%).........93 83 65
WEATHER COV.....LKY LKY LKY
WEATHER TYPE....RW RW RW
TSTM COV........LKY LKY LKY
CWR.............50 50 50
TEMP............61 61 61
RH..............94 92 87
20 FT WIND DIR..S S S
20 FT WIND SPD..21 21 20
20 FT WIND GUST.39 40 39
MIX HGT (KFT)...0.9 0.8 0.7
TRANSP WIND DIR.S S S
TRANSP WIND SPD.36 35 31
TODAY
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT) THEN BECOMING
SUNNY (20-30 PERCENT).
MAX TEMPERATURE.....AROUND 74.
MIN HUMIDITY........25 PERCENT.
WIND (20 FT)........WINDY. SOUTH WINDS 15 TO 20 MPH WITH GUSTS TO
AROUND 31 MPH SHIFTING TO THE NORTHWEST 20 TO
30 MPH WITH GUSTS TO AROUND 39 MPH EARLY IN THE
MORNING.
CWR.................0 PERCENT.
MIXING HEIGHT.......7600 TO 8100 FT AGL.
TRANSPORT WINDS.....SOUTH AROUND 30 MPH SHIFTING TO THE NORTHWEST
35 TO 40 MPH EARLY IN THE MORNING, THEN
INCREASING TO 40 TO 45 MPH LATE IN THE MORNING
SHIFTING TO THE WEST AROUND 35 MPH LATE IN THE
AFTERNOON.
SMOKE DISPERSAL.....GOOD INCREASING TO EXCELLENT LATE IN THE
MORNING.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........71 75 44 35 18 14 10 10 8 8 7 6
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............62 63 64 65 66 67 68 70 72 74 73 71
RH..............81 75 70 63 56 50 44 36 29 25 25 27
20 FT WIND DIR..S S NW NW NW NW NW NW NW W W NW
20 FT WIND SPD..18 15 17 22 26 30 30 28 23 22 22 21
20 FT WIND GUST.30 31 32 35 39 41 41 38 36 32 32 32
MIX HGT (KFT)...0.6 0.6 1.1 2.1 2.6 3.8 4.3 5.2 6.4 7.6 8.1 7.9
TRANSP WIND DIR.S SW W NW NW NW NW NW W W W W
TRANSP WIND SPD.29 30 31 35 38 41 43 40 36 32 32 32
FORECASTER...EW
REQUESTED BY...MATT THOMPSON
TYPE OF REQUEST...WILDFIRE
.TAG 2621807.0/UNR
.DELDT 09/14/26
.FORMATTERVERSION 2.0.0
.EMAIL MATTHEW.THOMPSON@PENNCOSD.GOV
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