326
FNUS73 KUNR 291038
FWSUNR
SPOT FORECAST FOR KOHNS FIRE...CC EM & HS
NATIONAL WEATHER SERVICE RAPID CITY SD
438 AM MDT WED JUL 29 2026
FORECAST IS BASED ON FORECAST START TIME OF 0600 MDT ON JULY 29.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
HOT TODAY WITH HIGHS OF AROUND 100. AFTERNOON HUMIDITIES
WILL RANGE FROM 21 TO 27% WITH SOUTHERLY WINDS OF 10 TO 15 MPH,
GUSTING TO 20 MPH. THUNDERSTORMS EXPECTED TO DEVELOP NEAR THE FIRE
SITE AFTER 1 PM WITH STORM CHANCES CONTINUING THROUGH THE EVENING
HOURS. MAIN CONCERNS WITH STORMS WILL BE GUSTY/ERRATIC OUTFLOW
WINDS, LIGHTNING, AND HEAVY RAINFALL.
SHOWERS WILL CONTINUE OVERNIGHT WITH HUMIDITIES RECOVERING TO
90%. TOTAL RAINFALL BETWEEN THIS AFTERNOON AND OVERNIGHT COULD
EXCEED 0.1". A COOL FRONT WILL CROSS THE REGION TONIGHT, STRONG
WINDS AREN'T EXPECTED WITH THIS FRONT BUT WINDS WILL BE OUT OF THE
NORTH TOMORROW WITH SLIGHTLY COOLER HIGHS AND HIGHER AFTERNOON
HUMIDITIES. CHANCES FOR STORMS RETURN TOMORROW AFTERNOON WITH
PRIMARY CONCERNS AGAIN BEING GUSTY/ERRATIC OUTFLOW WINDS,
LIGHTNING, AND HEAVY RAINFALL.
TODAY
SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT). CHANCE OF SHOWERS
AND THUNDERSTORMS IN THE AFTERNOON.
MAX TEMPERATURE.....AROUND 100.
MIN HUMIDITY........21 PERCENT.
WIND (20 FT)........SOUTH WINDS 10 TO 15 MPH SHIFTING TO THE EAST
AFTER 4 PM. GUSTS UP TO 20 MPH.
GUSTY AND ERRATIC WINDS EXPECTED NEAR
THUNDERSTORMS IN THE AFTERNOON.
CWR.................35 PERCENT.
MIXING HEIGHT.......8600 TO 9100 FT AGL INCREASING TO 12200 TO
12700 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTH AROUND 20 MPH.
SMOKE DISPERSAL.....GOOD INCREASING TO EXCELLENT EARLY IN THE
AFTERNOON, THEN DECREASING TO GOOD LATE IN THE
AFTERNOON.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........20 17 14 5 20 19 22 23 46 50 49 43
WEATHER COV..... SCH SCH CHC CHC CHC CHC
WEATHER TYPE.... RW RW RW RW RW RW
TSTM COV........ SCH SCH CHC CHC CHC CHC
CWR.............30 30 30 30 30 30 30 30 30 30 30 30
TEMP............67 71 76 81 87 91 94 96 97 98 98 95
RH..............81 76 66 56 45 36 29 25 23 21 23 27
20 FT WIND DIR..SE SE S S S S S S SE SE SE E
20 FT WIND SPD..10 10 10 12 12 12 12 10 9 9 9 9
20 FT WIND GUST.18 18 18 20 20 20 20 18 17 17 18 18
MIX HGT (KFT)...0.5 0.5 0.8 1.4 2.3 6.0 9.1 11 9.2 13 5.4 3.8
TRANSP WIND DIR.SE SE S S S S S S S S S S
TRANSP WIND SPD.17 17 18 18 18 18 18 17 16 16 16 17
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT). THUNDERSTORMS
LIKELY IN THE EVENING. SHOWERS LIKELY THROUGH
THE NIGHT.
MIN TEMPERATURE.....AROUND 63.
MAX HUMIDITY........90 PERCENT.
WIND (20 FT)........SOUTH TO SOUTHEAST WINDS AROUND 10 MPH WITH GUSTS TO
AROUND 20 MPH THROUGH 10 PM. WINDS BECOME LIGHT AND
PRIMARILY TERRAIN DRIVEN AFTER 10 PM. GUSTY
AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS
IN THE EVENING.
CWR.................45 PERCENT.
MIXING HEIGHT.......500 TO 1000 FT AGL.
TRANSPORT WINDS.....SOUTH AROUND 20 MPH SHIFTING TO THE SOUTHEAST
EARLY IN THE EVENING, THEN SHIFTING TO THE
NORTHEAST 10 TO 15 MPH OVERNIGHT.
SMOKE DISPERSAL.....POOR.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........80 66 87 77 83 78 89 90 91 87 71 56
WEATHER COV.....LKY LKY LKY CHC CHC CHC LKY LKY LKY CHC CHC CHC
WEATHER TYPE....RW RW RW RW RW RW RW RW RW RW RW RW
TSTM COV........LKY LKY LKY CHC CHC CHC
CWR.............50 50 50 50 50 50 50 50 50 50 50 50
TEMP............89 85 81 77 75 73 72 71 70 68 65 64
RH..............33 37 46 52 56 62 66 68 73 76 87 90
20 FT WIND DIR..SE SE SE S S N SE S S SW S S
20 FT WIND SPD..10 10 10 12 10 8 7 6 5 5 3 3
20 FT WIND GUST.20 18 20 20 17 15 15 12 12 10 8 8
MIX HGT (KFT)...2.3 0.9 0.6 0.6 0.5 0.5 0.6 0.6 0.5 0.5 0.5 0.5
TRANSP WIND DIR.S S SE E E SE SE E NE NE NE E
TRANSP WIND SPD.18 18 18 18 17 15 13 13 12 10 9 8
THURSDAY
SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT). SLIGHT CHANCE OF
THUNDERSTORMS EARLY IN THE AFTERNOON. CHANCE OF
SHOWERS IN THE AFTERNOON. CHANCE OF
THUNDERSTORMS LATE IN THE AFTERNOON.
MAX TEMPERATURE.....AROUND 93.
MIN HUMIDITY........29 PERCENT.
WIND (20 FT)........LIGHT AND TERRAIN DRIVEN WINDS BEFORE 10 AM. AFTER
10 AM, WINDS WILL STRENGTHEN AND SHIFT TO THE NORTH
WITH SUSTAINED WINDS OF 10 TO 12 MPH, GUSTING TO 22
MPH. GUSTY AND ERRATIC WINDS EXPECTED NEAR
THUNDERSTORMS IN THE AFTERNOON.
CWR.................20 PERCENT.
MIXING HEIGHT.......8900 TO 9400 FT AGL.
TRANSPORT WINDS.....EAST AROUND 10 MPH SHIFTING TO THE NORTH EARLY
IN THE MORNING, THEN INCREASING TO 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 (%).........52 34 30 24 29 22 28 20 10 16 15 8
WEATHER COV..... CHC CHC CHC CHC CHC CHC
WEATHER TYPE.... RW RW RW RW RW RW
TSTM COV........ SCH SCH SCH CHC CHC CHC
CWR.............20 20 20 20 20 20 20 20 20 20 20 20
TEMP............65 66 70 74 80 83 85 87 89 90 91 89
RH..............87 87 76 64 52 44 40 36 32 30 29 29
20 FT WIND DIR..S S W NW NW N N N N N N N
20 FT WIND SPD..2 3 3 5 6 9 10 12 12 12 12 12
20 FT WIND GUST.7 8 8 9 12 15 18 20 21 22 22 22
MIX HGT (KFT)...0.4 0.9 1.4 1.8 3.1 4.4 5.6 6.9 8.1 9.4 8.0 6.6
TRANSP WIND DIR.E E NE N N N N N N N N N
TRANSP WIND SPD.7 7 7 8 12 14 17 18 20 20 21 22
FORECASTER...EW
REQUESTED BY...J MITCHELL
TYPE OF REQUEST...WILDFIRE
.TAG 2618366.2/UNR
.DELDT 07/29/26
.FORMATTERVERSION 2.0.0
.EMAIL JIMM@CAMPBELLCOFIREWY.GOV
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