510
FNUS75 KRIW 271115
FWSRIW
SPOT FORECAST FOR EAST PILGRIM...USFS - BTF
NATIONAL WEATHER SERVICE RIVERTON WY
515 AM MDT MON JUL 27 2026
FORECAST IS BASED ON FORECAST START TIME OF 0600 MDT ON JULY 27.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE
DISCUSSION
SHOWERS AND A FEW THUNDERSTORMS MOVE THROUGH INITIALLY THIS
MORNING, WITH A 40 PERCENT CHANCE OF A WETTING RAIN ABOVE 0.10
INCHES. A FEW OF THESE SHOWERS MAY PRODUCE BRIEF SOUTHWEST WIND
GUSTS 20 TO 25 MPH. REDEVELOPMENT OF SHOWERS IS EXPECTED AROUND
1300, AND WILL CONTINUE ON AND OFF THROUGH THE REST OF THE
AFTERNOON. SOME GUSTY WINDS AGAIN ARE POSSIBLE WITH ANY PASSING
THUNDERSTORMS. OUTSIDE OF ANY SHOWER ACTIVITY, WINDS WILL REMAIN
GENERALLY LIGHT, WITH MOST WINDS STAYING TERRAIN INFLUENCED ONLY
AT 3 TO 6 MPH. HUMIDITY LEVELS WILL REMAIN ELEVATED THROUGH THE
AFTERNOON, LIKELY HOLDING ABOVE 40 PERCENT THROUGH 1500.
SHOWER ACTIVITY SHOULD BE ENDING BY 1900, WITH REMAINING MOISTURE
HELPING BRING EXCELLENT HUMIDITY RECOVERY NEAR 70 PERCENT. WINDS
WILL BE LIGHT DOWNSLOPE UNDER 5 MPH.
SHOWERS ARE POSSIBLE AGAIN ON TUESDAY, BUT WILL BE MORE ISOLATED.
THESE STORMS WILL HAVE LESS POTENTIAL FOR GUSTY WINDS, ANY RAIN
ACCUMULATIONS WILL BE MINIMAL.
..THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS
TODAY
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT). SCATTERED RAIN
SHOWERS THROUGH THE DAY. SCATTERED
THUNDERSTORMS IN THE AFTERNOON.
CWR.................3 PERCENT.
CHANCE OF PCPN......40 PERCENT.
CHANCE OF THUNDER...29 PERCENT.
MAX TEMPERATURE.....AROUND 79.
MIN HUMIDITY........38 PERCENT.
WIND (20 FT)........LIGHT WINDS. GUSTY AND ERRATIC WINDS EXPECTED
NEAR THUNDERSTORMS.
RIDGETOP WIND.......EAST AROUND 10 MPH UNTIL 1100, THEN WEST.
MIXING HEIGHT.......1500 FT AGL UNTIL 1100. 5500 FT AGL AFTER 1300.
TRANSPORT WINDS.....SOUTH 8 TO 10 MPH UNTIL 1300, THEN WEST
10 TO 12 MPH.
SMOKE DISPERSAL.....POOR UNTIL 1100. FAIR AFTER 1300.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........80 90 80 85 70 80 80 85 65 60 60 60
WEATHER COV.....ISO SCT SCT ISO ISO ISO SCT SCT SCT ISO ISO
WEATHER TYPE....RW RW RW RW RW RW RW RW RW RW RW
TSTM COV........ ISO ISO ISO SCT ISO ISO
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
CHC OF PCPN (%).20 30 40 20 10 20 20 30 30 30 10 10
CHC OF THDR (%).0 0 0 10 10 10 20 20 20 30 10 10
TEMP............57 56 58 61 65 68 70 73 75 76 77 78
RH..............65 69 68 63 59 54 50 47 42 38 35 35
20 FT WIND DIR..E NE E E SE SW W W NW W SW SW
20 FT WIND SPD..3 3 3 3 3 3 4 5 5 5 5 5
20 FT WIND GUST.6 6 6 6 7 8 10 10 11 12 12 12
RIDGE WIND DIR..E NE E E SE SW W W NW W SW SW
RIDGE WIND SPD..10 10 10 10 10 10 10 10 10 10 10 10
MIX HGT (KFT)...0.5 0.5 0.5 1.0 1.5 2.5 3.5 5.5 5.5 5.0 5.5 5.5
TRANSP WIND DIR.E NE SE S S SW SW W W W W W
TRANSP WIND SPD.8 8 8 8 10 9 9 10 12 10 12 12
SDSPL KT-FT/10004 4 4 6 12 20 28 50 56 44 54 56
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT) THEN BECOMING
PARTLY CLOUDY (25-35 PERCENT).
CWR.................0 PERCENT.
CHANCE OF PCPN......10 PERCENT.
CHANCE OF THUNDER...10 PERCENT.
MIN TEMPERATURE.....AROUND 52.
MAX HUMIDITY........71 PERCENT.
WIND (20 FT)........LIGHT WINDS. GUSTY AND ERRATIC WINDS EXPECTED
NEAR THUNDERSTORMS EARLY IN THE EVENING.
RIDGETOP WIND.......SOUTHWEST AROUND 10 MPH UNTIL 2100, THEN NORTH
UNTIL 2200, THEN EAST.
MIXING HEIGHT.......3000 FT AGL UNTIL 2000, THEN 500 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 8 TO 10 MPH UNTIL 2100, THEN
SOUTHEAST 8 TO 9 MPH.
SMOKE DISPERSAL.....FAIR UNTIL 1900. POOR AFTER 2000.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........65 70 75 70 70 35 30 35 20 20 20 25
WEATHER COV.....ISO
WEATHER TYPE....RW
TSTM COV........ISO
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
CHC OF PCPN (%).10 10 10 10 10 0 0 0 0 0 0 0
CHC OF THDR (%).10 10 10 10 10 0 0 0 0 0 0 0
TEMP............74 72 69 63 61 60 59 58 57 55 54 54
RH..............39 46 52 57 57 57 59 61 62 66 68 67
20 FT WIND DIR..SW SW W N E E E E E E E E
20 FT WIND SPD..5 4 3 3 3 4 4 4 4 4 4 4
20 FT WIND GUST.11 10 6 6 6 7 7 7 7 7 6 6
RIDGE WIND DIR..SW SW W N E E E E E E E E
RIDGE WIND SPD..10 10 10 10 10 10 10 10 10 10 10 10
MIX HGT (KFT)...4.5 3.0 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
TRANSP WIND DIR.SW SW S SE SE SE SE SE SE SE SE SE
TRANSP WIND SPD.10 9 8 8 8 9 9 9 9 9 9 9
SDSPL KT-FT/100043 23 4 4 4 4 4 4 4 4 4 4
TUESDAY
SKY/WEATHER.........SUNNY (15-25 PERCENT) THEN BECOMING PARTLY
SUNNY (60-70 PERCENT). ISOLATED SHOWERS AND
THUNDERSTORMS LATE IN THE AFTERNOON.
CWR.................3 PERCENT.
CHANCE OF PCPN......20 PERCENT.
CHANCE OF THUNDER...24 PERCENT.
MAX TEMPERATURE.....AROUND 83.
MIN HUMIDITY........25 PERCENT.
WIND (20 FT)........LIGHT WINDS. GUSTY AND ERRATIC WINDS EXPECTED
NEAR THUNDERSTORMS LATE IN THE AFTERNOON.
RIDGETOP WIND.......EAST AROUND 10 MPH UNTIL 0900, THEN SOUTH UNTIL
1400, THEN SOUTHWEST.
MIXING HEIGHT.......1000 FT AGL UNTIL 1000, THEN 2500 FT AGL UNTIL
1100, THEN 4500 FT AGL UNTIL 1200, THEN 8500 FT
AGL UNTIL 1300, THEN 11000 FT AGL UNTIL 1500,
THEN 8500 FT AGL UNTIL 1600, THEN 11000 FT AGL.
TRANSPORT WINDS.....SOUTHEAST AROUND 9 MPH UNTIL 1000. SOUTHWEST 14
TO 15 MPH AFTER 1300.
SMOKE DISPERSAL.....POOR UNTIL 1000. VERY GOOD AFTER 1300.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........10 10 5 5 10 5 5 15 25 35 65 65
WEATHER COV..... ISO ISO ISO ISO
WEATHER TYPE.... RW RW RW RW
TSTM COV........ ISO ISO ISO ISO
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
CHC OF PCPN (%).0 0 0 0 0 0 10 20 20 20 20 10
CHC OF THDR (%).0 0 0 0 0 0 10 20 20 20 20 10
TEMP............53 52 56 62 68 72 75 80 81 81 82 80
RH..............69 71 66 56 48 42 35 31 27 25 25 26
20 FT WIND DIR..E E SE S S S SW SW SW W SW SW
20 FT WIND SPD..4 4 4 4 4 5 6 6 6 6 6 6
20 FT WIND GUST.6 6 6 7 8 10 12 12 13 14 14 14
RIDGE WIND DIR..E E SE S S S SW SW SW W SW SW
RIDGE WIND SPD..10 10 10 10 10 10 10 10 15 15 15 15
MIX HGT (KFT)...0.5 0.5 0.5 1.0 2.5 4.5 8.5 11 11 8.5 11 11
TRANSP WIND DIR.SE SE SE S S SW SW W W W SW W
TRANSP WIND SPD.9 9 9 9 9 10 13 15 15 14 15 15
SDSPL KT-FT/10004 3 4 9 20 40 91 139 146 104 145 138
FORECAST DAYS 3 THROUGH 5
WEDNESDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS. LOWS IN THE
LOWER 50S. HIGHS IN THE LOWER 80S. LIGHT WINDS.
THURSDAY
MOSTLY CLEAR. SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS. LOWS IN
THE LOWER 50S. HIGHS IN THE MID 80S. LIGHT WINDS.
FRIDAY
MOSTLY CLEAR. LOWS IN THE LOWER 50S. HIGHS IN THE UPPER 80S.
LIGHT WINDS.
FORECASTER...STRAUB
REQUESTED BY...TETON DISPATCH - KATIE
TYPE OF REQUEST...WILDFIRE
.TAG 2618358.0/RIW
.DELDT 07/27/26
.FORMATTERVERSION 2.0.0
.EMAIL WYTDC@FIRENET.GOV
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