335
FNUS75 KRIW 081700
FWSRIW
SPOT FORECAST FOR GRANITE...NPS
NATIONAL WEATHER SERVICE RIVERTON WY
1100 AM MDT SAT AUG 8 2026
FORECAST IS BASED ON FORECAST START TIME OF 1100 MDT ON AUGUST 08.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE
DISCUSSION
HIGH PRESSURE CONTINUES TODAY, WITH SUNNY BUT SMOKY CONDITIONS.
WINDS WILL INCREASE FROM THE WEST TO NORTHWEST, MAINLY FUNNELING
UP THE GREEN RIVER GORGE. WIND GUSTS WILL REACH AROUND 20 MPH THIS
AFTERNOON, ESPECIALLY AT HIGHER ELEVATIONS. HUMIDITY WILL FALL TO
15 PERCENT THROUGH THE AFTERNOON.
MOSTLY SUNNY AND SMOKY CONDITIONS CONTINUE SUNDAY. SOME MOISTURE
MAY MOVE IN LATE AFTERNOON, BRINGING A VERY LOW CHANCE FOR
LIGHTNING OR A SHOWER. WIND GUSTS WILL BE HIGHER, REACHING 25 TO
30 MPH FROM THE WEST AND NORTHWEST. AFTER OVERNIGHT HUMIDITY
RECOVERY ONLY TO 35 PERCENT, HUMIDITY WILL STABILIZE AROUND 20
PERCENT SUNDAY AFTERNOON.
..THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS
REST OF TODAY
SKY/WEATHER.........SUNNY (5-15 PERCENT). AREAS OF SMOKE.
CWR.................0 PERCENT.
CHANCE OF PCPN......0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....AROUND 75.
MIN HUMIDITY........15 PERCENT.
WIND (20 FT)........WEST WINDS 10 TO 13 MPH WITH GUSTS TO AROUND 21
MPH.
RIDGETOP WIND.......WEST 15 TO 20 MPH.
MIXING HEIGHT.......6000 FT AGL UNTIL 1200. 11000 FT AGL AFTER
1400.
TRANSPORT WINDS.....WEST 17 TO 24 MPH.
SMOKE DISPERSAL.....EXCELLENT.
TIME (MDT) 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........5 0 5 0 5 15 10
WEATHER COV.....ARS PTY PTY PTY PTY ARS PTY
WEATHER TYPE....SMK SMK SMK SMK SMK SMK SMK
TSTM COV........
CWR.............0 0 0 0 0 0 0
CHC OF PCPN (%).0 0 0 0 0 0 0
CHC OF THDR (%).0 0 0 0 0 0 0
TEMP............66 69 72 73 73 74 72
RH..............22 19 17 17 17 17 17
20 FT WIND DIR..W W W W W W W
20 FT WIND SPD..10 12 12 13 13 13 13
20 FT WIND GUST.18 19 21 21 21 21 21
RIDGE WIND DIR..W W W W W W W
RIDGE WIND SPD..15 20 20 20 20 20 20
MIX HGT (KFT)...6.0 8.0 9.5 10 11 11 11
TRANSP WIND DIR.W W W W W W W
TRANSP WIND SPD.17 21 23 23 24 24 23
SDSPL KT-FT/100089 146 189 202 221 229 211
SUNDAY
SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT). AREAS OF SMOKE.
CWR.................0 PERCENT.
CHANCE OF PCPN......10 PERCENT.
CHANCE OF THUNDER...7 PERCENT.
MAX TEMPERATURE.....AROUND 72.
MIN HUMIDITY........20 PERCENT.
WIND (20 FT)........LIGHT WINDS UNTIL 0800, THEN WEST 7 TO 14 MPH
WITH GUSTS TO AROUND 23 MPH.
RIDGETOP WIND.......WEST 10 TO 15 MPH UNTIL 1000, THEN AROUND 20
MPH.
MIXING HEIGHT.......1000 FT AGL UNTIL 0900. 11000 FT AGL AFTER
1300.
TRANSPORT WINDS.....WEST 14 TO 23 MPH UNTIL 1300, THEN 23 TO 25
MPH.
SMOKE DISPERSAL.....POOR UNTIL 0900, THEN EXCELLENT.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........15 25 35 15 20 20 15 20 20 30 45 25
WEATHER COV.....ARS PTY PTY PTY PTY PTY PTY PTY PTY PTY PTY PTY
WEATHER TYPE....SMK SMK SMK SMK SMK SMK SMK SMK SMK SMK SMK SMK
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
CHC OF PCPN (%).0 0 0 0 0 0 0 0 10 10 10 10
CHC OF THDR (%).0 0 0 0 0 0 0 0 10 10 10 10
TEMP............54 53 56 60 65 67 69 71 72 72 72 71
RH..............36 37 35 32 28 26 23 21 20 20 19 19
20 FT WIND DIR..W W W W W W W W W W W W
20 FT WIND SPD..5 5 7 10 13 14 14 14 14 13 13 13
20 FT WIND GUST.8 10 14 19 22 22 23 23 22 21 21 21
RIDGE WIND DIR..W W W W W W W W W W W W
RIDGE WIND SPD..10 10 15 15 20 20 20 20 20 20 20 20
MIX HGT (KFT)...0.5 0.5 1.0 3.0 5.5 7.5 9.0 11 11 11 11 11
TRANSP WIND DIR.W W W W W W W W W W W W
TRANSP WIND SPD.14 14 14 17 21 22 23 25 25 25 24 23
SDSPL KT-FT/10007 9 13 48 102 142 183 229 238 240 228 210
FORECAST DAYS 3 THROUGH 5
MONDAY
PARTLY CLOUDY. PATCHY SMOKE IN THE EVENING, THEN AREAS OF SMOKE
OVERNIGHT. SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS. LOWS IN
THE LOWER 50S. HIGHS IN THE LOWER 70S. SOUTHWEST WINDS AROUND
8 MPH.
TUESDAY
PARTLY CLOUDY. LOWS IN THE LOWER 50S. HIGHS IN THE UPPER 60S.
WEST WINDS AROUND 8 MPH.
WEDNESDAY
MOSTLY CLOUDY. LOWS IN THE LOWER 50S. HIGHS IN THE MID 60S. LIGHT
WINDS.
FORECASTER...STRAUB
REQUESTED BY...AUDREY FARMER
TYPE OF REQUEST...WILDFIRE
.TAG 2619228.0/RIW
.DELDT 08/08/26
.FORMATTERVERSION 2.0.0
.EMAIL WYTDC@FIRENET.GOV
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