807
FNUS75 KRIW 100346
FWSRIW
SPOT FORECAST FOR 308...IA CPC
NATIONAL WEATHER SERVICE RIVERTON WY
946 PM MDT THU JUL 9 2026
FORECAST IS BASED ON FORECAST START TIME OF 2200 MDT ON JULY 09.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE
DISCUSSION
RECENT SHOWERS AND THUNDERSTORMS ARE DISSIPATING AND MOVING
SOUTHEAST TONIGHT, WITH LINGERING CLOUDS THROUGH 3-4 AM. SO, NO
PRECIPITATION EXPECTED AT THE FIRE SITE OVERNIGHT. WINDS WILL
REMAIN ABOUT 6 TO 8 MPH FROM THE SOUTH-SOUTHEAST THROUGH THE
NIGHT. FRIDAY WILL BE MOSTLY CLEAR WITH LIGHT-ISH SOUTHWEST WINDS
UNTIL MID-AFTERNOON (1500). CLOUDS THEN DEVELOP WITH ISOLATED
SHOWERS AND THUNDERSTORMS POSSIBLE IN THE AREA. DEPENDING ON THE
LOCATION OF THE STORMS, GUSTY OUTFLOWS ARE LIKELY AT THE SITE, BUT
DIRECTION IS UNCERTAIN. WINDS SHOULD RETURN TO THE SOUTH-SOUTHEAST
FRIDAY EVENING AND SHOULD BE A BIT STRONGER (8 TO 12 MPH) THROUGH
THE NIGHT. TEMPERATURES WILL INCREASE FRIDAY BY 5-7 DEGREES OVER
THURSDAY TEMPERATURES, WITH EVEN WARMER TEMPERATURES ON SATURDAY.
..THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS
REST OF TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT) BECOMING MOSTLY
CLEAR (10-20 PERCENT) AFTER 0400.
CWR.................0 PERCENT.
CHANCE OF PCPN......0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....AROUND 57.
MAX HUMIDITY........62 PERCENT.
WIND (20 FT)........SOUTH-SOUTHEAST WINDS 5 TO 8 MPH.
RIDGETOP WIND.......SOUTHEAST AROUND 8 TO 10 MPH.
MIXING HEIGHT.......1000 FT AGL.
TRANSPORT WINDS.....SOUTHEAST 9 TO 12 MPH.
SMOKE DISPERSAL.....POOR.
TIME (MDT) 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........45 40 30 55 45 30 30 30
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0
CHC OF PCPN (%).0 0 0 0 0 0 0 0
CHC OF THDR (%).0 0 0 0 0 0 0 0
TEMP............65 64 62 62 60 59 58 59
RH..............46 49 51 53 58 60 62 61
20 FT WIND DIR..SE SE SE SE SE SE SE SE
20 FT WIND SPD..5 5 5 5 5 5 4 4
20 FT WIND GUST.10 10 10 10 10 8 8 8
RIDGE WIND DIR..SE SE SE SE SE SE SE SE
RIDGE WIND SPD..10 10 10 10 10 10 10 10
MIX HGT (KFT)...0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
TRANSP WIND DIR.SE SE S S S S S S
TRANSP WIND SPD.10 10 12 13 12 10 9 9
SDSPL KT-FT/10005 5 5 6 5 5 4 4
FRIDAY
SKY/WEATHER.........MOSTLY SUNNY (10-20 PERCENT) THROUGH 1400, THEN
PARTLY CLOUD (35-45 PERCENT). ISOLATED SHOWERS
THUNDERSTORMS AFTER 1500.
CWR.................0 PERCENT.
CHANCE OF PCPN......10-15 PERCENT AFTER 1500.
CHANCE OF THUNDER...10-15 PERCENT AFTER 1500.
MAX TEMPERATURE.....AROUND 85.
MIN HUMIDITY........15 PERCENT.
WIND (20 FT)........LIGHT SOUTH-SOUTHEAST WINDS UNTIL 1000, THEN
SOUTHWEST WINDS 7 TO 10 MPH. GUSTY SOUTH-
SOUTHEAST (OR VARIABLE) OUTFLOW WINDS POSSIBLE
AFTER 2100.
RIDGETOP WIND.......SOUTH AROUND 10 MPH. GUSTY WINDS OVER 20 MPH
POSSIBLE AFTER 2100.
MIXING HEIGHT.......2000 FT AGL UNTIL 1000, BECOMING 13000 FT AGL AFTER
1500.
TRANSPORT WINDS.....SOUTH 8 TO 10 MPH UNTIL 1500, THEN SOUTHWEST 10
TO 15 MPH.
SMOKE DISPERSAL.....POOR UNTIL 0900, BECOMING VERY GOOD AFTER 1400.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........40 35 15 5 0 5 5 5 15 25 35 30
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
CHC OF PCPN (%).0 0 0 0 0 10 10 10 10 10 10 10
CHC OF THDR (%).0 0 0 0 0 0 10 10 10 10 10 10
TEMP............58 61 65 69 75 78 80 83 84 85 85 85
RH..............63 57 49 42 36 30 24 20 18 16 15 14
20 FT WIND DIR..S S S S S SW SW SW SW SW S SE
20 FT WIND SPD..4 4 4 3 3 3 3 4 5 6 5 4
20 FT WIND GUST.8 8 7 7 7 7 8 11 13 14 13 12
RIDGE WIND DIR..S S S S S SW SW SW SW SW S SE
RIDGE WIND SPD..10 10 10 10 10 10 10 10 10 10 10 10
MIX HGT (KFT)...0.5 0.5 1.0 2.0 4.5 8.5 11 12 13 13 13 13
TRANSP WIND DIR.S S S S S SW SW SW SW SW SW S
TRANSP WIND SPD.9 9 9 8 8 8 8 9 10 12 10 10
SDSPL KT-FT/10004 4 9 15 30 60 78 96 115 133 111 112
FRIDAY NIGHT
SKY/WEATHER.........MOSTLY CLOUDY (60-70 PERCENT) IN THE EARLY EVENING,
BECOMING MOSTLY CLEAR (15-25 PERCENT) AFTER 2200.
CWR.................0 PERCENT.
CHANCE OF PCPN......10 PERCENT UNTIL 2100, THEN 0 PERCENT.
CHANCE OF THUNDER...10 PERCENT UNTIL 2100, THEN 0 PERCENT.
MIN TEMPERATURE.....AROUND 59.
MAX HUMIDITY........46 PERCENT.
WIND (20 FT)........GUSTY AND VARIABLE WINDS UNTIL 2100, THEN
SOUTHEAST 8 TO 12 MPH THROUGH THE NIGHT.
RIDGETOP WIND.......SOUTHEAST 10 TO 15 MPH.
MIXING HEIGHT.......12500 FT AGL UNTIL 1900, THEN 1000 FT AGL AFTER
2000.
TRANSPORT WINDS.....SOUTHEAST 10 TO 20 MPH UNTIL 2200, BECOMING
SOUTH AROUND 10 TO 12 MPH THROUGH THE NIGHT.
SMOKE DISPERSAL.....VERY GOOD EARLY IN THE EVENING DECREASING TO
GOOD LATE IN THE NIGHT UNTIL 2200, THEN POOR.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........20 20 10 20 25 35 10 20 15 20 15 10
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
CHC OF PCPN (%).10 0 0 0 0 0 0 0 0 0 0 0
CHC OF THDR (%).10 0 0 0 0 0 0 0 0 0 0 0
TEMP............84 83 80 74 72 70 69 67 65 63 61 61
RH..............15 16 21 25 29 31 34 36 40 43 44 44
20 FT WIND DIR..SE SE SE SE SE SE SE SE SE SE SE SE
20 FT WIND SPD..4 4 5 7 7 9 8 7 7 6 6 6
20 FT WIND GUST.11 11 13 16 17 18 17 14 13 12 11 10
RIDGE WIND DIR..SE SE SE SE SE SE SE SE SE SE SE SE
RIDGE WIND SPD..10 10 10 15 15 15 15 15 15 15 15 10
MIX HGT (KFT)...13 10 1.0 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
TRANSP WIND DIR.S S SE SE SE SE SE SE SE S S S
TRANSP WIND SPD.10 12 13 14 18 21 22 20 18 16 13 12
SDSPL KT-FT/1000111 98 11 7 9 10 10 9 8 7 6 5
FORECAST DAYS 3 THROUGH 5
SATURDAY
MOSTLY CLEAR AND VERY WARM. LOWS IN THE MORNING IN THE
UPPER 50S. SOUTHWEST WINDS 10 TO 15 MPH IN THE AFTERNOON.
HIGHS IN THE MID 90S.
SUNDAY
CLEAR. LOWS AROUND 60. HIGHS IN THE MID 90S. LIGHT WINDS.
MONDAY
MOSTLY CLEAR. LOWS IN THE MID 60S. HIGHS IN THE MID 90S.
SOUTHEAST WINDS AROUND 9 MPH.
TUESDAY
MOSTLY CLEAR. LOWS IN THE MID 60S. HIGHS IN THE MID 90S. LIGHT
WINDS.
FORECASTER...MCDONALD
REQUESTED BY...CASPER DISPATCH
TYPE OF REQUEST...WILDFIRE
.TAG 2617137.0/RIW
.DELDT 07/09/26
.FORMATTERVERSION 2.0.0
.EMAIL WYCPC@FIRENET.GOV
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