325
FNUS75 KRIW 151100
FWSRIW
SPOT FORECAST FOR UPPER GROS VENTRE RX...BTNF
NATIONAL WEATHER SERVICE RIVERTON WY
500 AM MDT THU OCT 15 2026
FORECAST IS BASED ON IGNITION TIME OF 0700 MDT ON OCTOBER 15.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE
DISCUSSION
SKIES REMAIN CLEAR, WITH SOME LIGHT FOG EARLY THIS MORNING. WINDS
WILL CONTINUE FROM THE NORTHEAST EARLY THIS MORNING, BEFORE
DECREASING AND TURNING MORE FROM THE NORTH DURING THE AFTERNOON.
SMOKE DISPERSAL WILL REMAIN POOR MOST OF THE DAY DUE TO LIGHT
WINDS AND LOW MIXING HEIGHTS.
WINDS WILL SHIFT FROM THE EAST OVERNIGHT, STAYING 5 MPH OR LESS.
SOME LIGHT SURFACE FOG IS AGAIN POSSIBLE THROUGH THE NIGHT.
FRIDAY WILL AGAIN BE CLEAR, WITH TEMPERATURES REACHING THE MID
50S. WINDS WILL BEGIN FROM THE EAST AROUND 5 MPH, BEFORE SHIFTING
FROM THE WEST AROUND 1300. LIGHT WINDS AND LOW MIXING HEIGHTS WILL
AGAIN BRING POOR SMOKE DISPERSAL DURING THE DAY.
REST OF TODAY
SKY/WEATHER.........SUNNY (5-15 PERCENT). AREAS OF FOG EARLY IN THE
MORNING.
CWR.................0 PERCENT.
CHANCE OF PCPN......0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....AROUND 52.
MIN HUMIDITY........29 PERCENT.
WIND (20 FT)........LIGHT WINDS.
RIDGETOP WIND.......NORTHEAST AROUND 10 MPH UNTIL 1000, THEN LIGHT
UNTIL 1100, THEN NORTH AROUND 10 MPH.
MIXING HEIGHT.......2000 FT AGL UNTIL 1200, THEN 4500 FT AGL.
TRANSPORT WINDS.....NORTHEAST 7 TO 9 MPH UNTIL 1300, THEN NORTH 9
TO 12 MPH.
SMOKE DISPERSAL.....POOR.
TIME (MDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........5 5 5 5 5 5 5 15 5 5 5
WEATHER COV.....WID WID WID
WEATHER TYPE....FST FST FST
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0
CHC OF PCPN (%).0 0 0 0 0 0 0 0 0 0 0
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0
TEMP............25 24 29 41 45 48 49 50 51 52 50
RH..............98 97 83 61 51 40 37 33 30 30 29
20 FT WIND DIR..NE NE E E NE N N N N N NW
20 FT WIND SPD..3 3 3 2 3 4 4 5 6 6 6
20 FT WIND GUST.4 4 4 4 6 6 6 7 7 7
RIDGE WIND DIR..NE NE E E NE N N N N N NW
RIDGE WIND SPD..10 10 10 5 10 10 10 10 10 10 10
MIX HGT (KFT)...0.5 0.5 0.5 1.5 2.0 3.0 3.5 4.0 4.5 4.0 3.5
TRANSP WIND DIR.NE E E NE N N N N N N N
TRANSP WIND SPD.8 8 8 7 8 9 9 12 12 12 12
SDSPL KT-FT/10004 4 5 8 15 25 29 41 44 41 35
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR (10-20 PERCENT). WIDESPREAD FROST
IN THE LATE EVENING AND OVERNIGHT.
CWR.................0 PERCENT.
CHANCE OF PCPN......0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....AROUND 22.
MAX HUMIDITY........83 PERCENT.
WIND (20 FT)........LIGHT WINDS.
RIDGETOP WIND.......NORTH AROUND 10 MPH UNTIL 2100, THEN EAST.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....NORTH 9 TO 10 MPH UNTIL 2000, THEN EAST 10 TO
13 MPH UNTIL 0300, THEN SOUTHEAST 9 TO 12 MPH.
SMOKE DISPERSAL.....POOR.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........10 15 10 10 10 15 20 15 15 10 5 10
WEATHER COV..... WID WID WID WID WID WID WID WID
WEATHER TYPE.... FST FST FST FST FST FST FST FST
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 0 0 0 0
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............48 42 35 32 30 27 27 26 26 24 24 24
RH..............34 45 53 60 68 76 78 81 81 83 81 81
20 FT WIND DIR..N N NE E E E E E E E E E
20 FT WIND SPD..5 4 5 6 6 6 6 6 6 6 5 4
20 FT WIND GUST.6 6 6 7 7 7 7 7 10 7 6 6
RIDGE WIND DIR..N N NE E E E E E E E E E
RIDGE WIND SPD..10 10 10 10 10 10 10 10 15 10 10 10
MIX HGT (KFT)...1.0 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
TRANSP WIND DIR.N N E E E E E E E SE SE SE
TRANSP WIND SPD.10 9 10 12 12 12 12 12 13 12 10 9
SDSPL KT-FT/100011 4 5 5 5 5 5 4 6 5 5 4
FRIDAY
SKY/WEATHER.........SUNNY (10-20 PERCENT). WIDESPREAD FROST EARLY
IN THE MORNING.
CWR.................0 PERCENT.
CHANCE OF PCPN......0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....AROUND 57.
MIN HUMIDITY........27 PERCENT.
WIND (20 FT)........LIGHT WINDS.
RIDGETOP WIND.......SOUTHEAST AROUND 10 MPH UNTIL 1000, THEN LIGHT
UNTIL 1400, THEN WEST AROUND 10 MPH.
MIXING HEIGHT.......1500 FT AGL UNTIL 1300, THEN 3000 FT AGL.
TRANSPORT WINDS.....SOUTHEAST 7 TO 9 MPH UNTIL 1100, THEN LIGHT
UNTIL 1300, THEN WEST 9 TO 12 MPH.
SMOKE DISPERSAL.....POOR.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........10 10 15 5 5 10 15 20 15 10 10 10
WEATHER COV.....WID WID WID WID
WEATHER TYPE....FST FST FST FST
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 0 0 0 0
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............23 24 24 29 41 46 50 53 55 56 57 55
RH..............81 85 86 73 53 44 34 32 30 27 27 27
20 FT WIND DIR..E E SE SE S S SW W W W W W
20 FT WIND SPD..4 3 3 3 2 1 1 2 4 4 4 3
20 FT WIND GUST.6 6 6 8 6 4 4 6 8 10 10 7
RIDGE WIND DIR..E E SE SE S S SW W W W W W
RIDGE WIND SPD..10 10 10 10 5 5 5 5 10 10 10 10
MIX HGT (KFT)...0.5 0.5 0.5 0.5 1.0 1.5 1.5 2.5 3.0 3.0 2.5 2.0
TRANSP WIND DIR.SE SE SE S S SW SW W W W W W
TRANSP WIND SPD.9 8 8 8 7 6 6 10 12 9 12 10
SDSPL KT-FT/10004 3 2 3 5 7 9 24 29 24 27 16
FORECAST DAYS 3 THROUGH 5
SATURDAY
MOSTLY CLEAR. LOWS IN THE MID 20S. HIGHS AROUND 60. LIGHT WINDS.
SUNDAY
MOSTLY CLEAR. LOWS IN THE MID 20S. HIGHS IN THE UPPER 50S. LIGHT
WINDS.
MONDAY
MOSTLY CLEAR. LOWS IN THE MID 20S. HIGHS IN THE UPPER 50S. LIGHT
WINDS.
FORECASTER...STRAUB
REQUESTED BY...ERIC HAWES
TYPE OF REQUEST...PRESCRIBED
.TAG 2623595.3/RIW
.DELDT 10/15/26
.FORMATTERVERSION 2.0.0
.EMAIL ERIC.HAWES@USDA.GOV
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