095
FNUS75 KRIW 082119
FWSRIW
SPOT FORECAST FOR BARE FIRE...WYUSFS
NATIONAL WEATHER SERVICE RIVERTON WY
319 PM MDT SAT AUG 8 2026
FORECAST IS BASED ON FORECAST START TIME OF 0700 MDT ON AUGUST 09.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE
DISCUSSION
HOT, DRY, AND BREEZY CONDITIONS CONTINUE FOR SUNDAY. RELATIVE
HUMIDITY VALUES WILL BE ABOUT 5 PERCENT HIGHER THAN SATURDAY. WIND
WILL BE VERY SIMILAR TO SATURDAY, INCREASING AFTER 1000 WITH
WEST-NORTHWESTERLY GUSTS OF 20 TO 25 MPH THROUGH THE AFTERNOON,
ONCE AGAIN.
THERE WILL BE A BIT MORE CUMULUS BUILDUP IN THE
AFTERNOON, WITH SCATTERED VIRGA SHOWERS AND ISOLATED THUNDERSTORMS
FROM ABOUT 1300 TO 1900. RAIN CHANCES WILL BE QUITE LOW, WITH A 15
PERCENT CHANCE OF DRY LIGHTNING DURING THIS TIME. THE CHANCE OF
GUSTY OUTFLOWS, UP TO 50 MPH, WILL INCREASE TO ABOUT 30 PERCENT.
HUMIDITY RECOVERY WILL REMAIN POOR SUNDAY NIGHT, BUT IMPROVE
SLIGHTLY. SIMILAR CONDITIONS CAN BE EXPECTED MONDAY, WITH A SLIGHT
INCREASE IN HUMIDITY AND SLIGHT DECREASE IN DRY LIGHTNING AND
OUTFLOWS.
..THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS
SUNDAY
SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT). SMOKE.
CWR.................0 PERCENT.
CHANCE OF PCPN......20 PERCENT.
CHANCE OF THUNDER...15 PERCENT.
MAX TEMPERATURE.....AROUND 79.
MIN HUMIDITY........19 PERCENT.
WIND (20 FT)........LIGHT WINDS UNTIL 1000, THEN WEST 10 TO 15 MPH
WITH GUSTS TO AROUND 25 MPH. GUSTY AND ERRATIC
WINDS EXPECTED NEAR THUNDERSTORMS AND VIRGA
SHOWERS.
RIDGETOP WIND.......WEST 10 TO 15 MPH UNTIL 1100, THEN AROUND 20
MPH.
MIXING HEIGHT.......500 FT AGL UNTIL 0900. 12500 FT AGL AFTER 1300.
TRANSPORT WINDS.....WEST 13 TO 22 MPH UNTIL 1600, THEN AROUND 23
MPH.
SMOKE DISPERSAL.....POOR UNTIL 0900 INCREASING THROUGH THE MORNING
TO EXCELLENT AFTER 1300.
TIME (MDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........45 40 40 20 15 20 20 30 35 20 15
WEATHER COV.....PTY PTY PTY PTY PTY PTY PTY ISO PTY PTY PTY
WEATHER TYPE....SMK SMK SMK SMK SMK SMK SMK RW SMK SMK SMK
TSTM COV........ ISO
CWR.............0 0 0 0 0 0 0 0 0 0 0
CHC OF PCPN (%).0 0 0 0 0 10 10 10 10 0 0
CHC OF THDR (%).0 0 0 0 0 10 10 10 10 0 0
TEMP............56 59 65 71 73 76 77 78 79 77 77
RH..............40 39 31 26 23 21 20 19 19 19 18
20 FT WIND DIR..W W W W W W W W W W W
20 FT WIND SPD..6 6 6 9 11 12 11 12 12 12 11
20 FT WIND GUST.11 13 12 17 20 21 21 21 22 22 21
RIDGE WIND DIR..W W W W W W W W W W W
RIDGE WIND SPD..15 15 10 15 20 20 20 20 20 20 20
MIX HGT (KFT)...0.5 0.5 3.0 6.5 9.5 11 12 13 13 12 12
TRANSP WIND DIR.W W W W W W W W W W W
TRANSP WIND SPD.13 13 14 16 21 22 22 22 22 23 23
SDSPL KT-FT/10006 7 38 94 167 197 218 233 241 240 229
SUNDAY NIGHT
SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT). SMOKE.
CWR.................0 PERCENT.
CHANCE OF PCPN......5 PERCENT.
CHANCE OF THUNDER...1 PERCENT.
MIN TEMPERATURE.....AROUND 55.
MAX HUMIDITY........44 PERCENT.
WIND (20 FT)........WEST WINDS 7 TO 12 MPH WITH GUSTS TO AROUND 20
MPH UNTIL 2100, THEN LIGHT.
RIDGETOP WIND.......WEST 15 TO 20 MPH UNTIL 2200, THEN AROUND 10
MPH.
MIXING HEIGHT.......11000 FT AGL UNTIL 1900. 500 FT AGL AFTER 2100.
TRANSPORT WINDS.....WEST 13 TO 22 MPH UNTIL 2200, THEN AROUND 12
MPH.
SMOKE DISPERSAL.....EXCELLENT UNTIL 1900 DECREASING IN THE EVENING
TO POOR AFTER 2100.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........20 30 35 25 30 40 25 45 45 35 35 30
WEATHER COV.....PTY PTY PTY PTY PTY ARS ARS ARS ARS ARS ARS ARS
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 0 0 0 0
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............77 75 72 67 64 62 61 60 59 58 57 56
RH..............19 22 25 29 32 34 35 37 38 40 40 42
20 FT WIND DIR..W W W W W W W W W W W W
20 FT WIND SPD..11 9 7 6 6 6 6 6 5 5 5 5
20 FT WIND GUST.20 18 14 12 10 10 10 10 10 10 10 8
RIDGE WIND DIR..W W W W W W W W W W W W
RIDGE WIND SPD..20 15 15 15 10 10 10 10 10 10 10 10
MIX HGT (KFT)...11 8.5 1.0 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
TRANSP WIND DIR.W W W W W W W W W W W W
TRANSP WIND SPD.22 16 14 13 12 12 12 12 12 12 12 12
SDSPL KT-FT/1000206 118 10 6 6 6 6 6 6 6 6 6
MONDAY
SKY/WEATHER.........MOSTLY SUNNY (30-40 PERCENT).
CWR.................0 PERCENT.
CHANCE OF PCPN......10 PERCENT.
CHANCE OF THUNDER...6 PERCENT.
MAX TEMPERATURE.....AROUND 78.
MIN HUMIDITY........24 PERCENT.
WIND (20 FT)........LIGHT WINDS UNTIL 1100, THEN WEST 10 TO 15 MPH
WITH GUSTS TO AROUND 25 MPH.
RIDGETOP WIND.......WEST 10 TO 15 MPH UNTIL 1200, THEN AROUND 20
MPH.
MIXING HEIGHT.......2000 FT AGL UNTIL 0900. 12000 FT AGL AFTER
1200.
TRANSPORT WINDS.....WEST 12 TO 18 MPH UNTIL 1200, THEN 22 TO 23
MPH.
SMOKE DISPERSAL.....POOR UNTIL 0800 INCREASING IN THE MORNING TO
EXCELLENT AFTER 1200.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........25 50 30 15 15 20 20 25 35 40 40 40
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 0 10 10 10 10 10 10
CHC OF THDR (%).0 0 0 0 0 0 10 10 10 10 10 10
TEMP............56 55 58 63 67 71 75 76 77 77 77 77
RH..............44 46 43 38 34 31 28 26 25 24 24 24
20 FT WIND DIR..W W W W W W W W W W W W
20 FT WIND SPD..5 4 4 4 6 8 11 12 13 13 13 12
20 FT WIND GUST.8 8 8 8 12 16 20 22 24 24 24 23
RIDGE WIND DIR..W W W W W W W W W W W W
RIDGE WIND SPD..10 10 10 10 10 15 20 20 20 20 20 20
MIX HGT (KFT)...0.5 0.5 2.0 3.0 6.0 8.5 11 12 12 12 11 11
TRANSP WIND DIR.W W W W W W W W W W W W
TRANSP WIND SPD.13 12 12 12 15 18 22 22 23 23 22 22
SDSPL KT-FT/10006 7 19 31 75 135 211 216 232 237 213 201
FORECAST DAYS 3 THROUGH 5
TUESDAY
PARTLY CLOUDY. LOWS IN THE LOWER 50S. HIGHS IN THE UPPER 70S.
WEST WINDS AROUND 10 MPH.
WEDNESDAY
MOSTLY CLOUDY. LOWS IN THE MID 50S. HIGHS IN THE LOWER 70S. WEST
WINDS AROUND 10 MPH.
THURSDAY
MOSTLY CLOUDY. CHANCE OF SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS. LOWS IN THE LOWER 50S. HIGHS IN THE UPPER 60S.
LIGHT WINDS.
FORECASTER...ROWE
REQUESTED BY...BEN HOYLE
TYPE OF REQUEST...WILDFIRE
.TAG 2619233.0/RIW
.DELDT 08/08/26
.FORMATTERVERSION 2.0.0
.EMAIL ERIC.NEISWANGER@USDA.GOV,BENJAMIN_HOYLE@FIRENET.GOV
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