812
FNUS75 KRIW 071145
FWSRIW
SPOT FORECAST FOR 1000 ISLAND LAKE MISSING PERSON...TIP TOP SEARCH AND RESCUE
NATIONAL WEATHER SERVICE RIVERTON WY
545 AM MDT MON SEP 7 2026
FORECAST IS BASED ON FORECAST START TIME OF 0700 MDT ON SEPTEMBER 07.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE
DISCUSSION
CONDITIONS ARE EXPECTED TO REMAIN DRY TODAY AND TONIGHT. THERE IS
A LINE OF LIGHT SHOWERS WITH ISOLATED LIGHTNING EXTENDING FROM
HOBACK JUNCTION TO THE SALT/WYOMING RANGES THIS MORNING. THIS LINE
IS EXPECTED TO DISSIPATE AND NOT IMPACT THE SITE BY 0900. CLOUDS
CONTINUE TO LINGER ALONG THE HIGHER ELEVATIONS OF THE WIND RIVER
MOUNTAINS THIS MORNING AND WILL BEGIN TO SCATTER OUT AFTER 1200
WITH CLEAR SKIES BY 1500. WEST TO SOUTHWEST WINDS WILL INCREASE
AFTER SUNRISE, WITH GUSTS OF 30 TO 35 MPH EXPECTED BY 1200. THESE
WINDS WILL BEGIN TO DECREASE AFTER 1800, TURNING MORE
NORTHWESTERLY AND BECOMING LIGHT (10 MPH OR LESS) BY 2200.
..THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS
TODAY
SKY/WEATHER.........MOSTLY CLOUDY (75-85 PERCENT) THEN BECOMING
MOSTLY SUNNY (25-35 PERCENT). PATCHY FOG EARLY
IN THE MORNING. CHANCE OF RAIN SHOWERS EARLY IN
THE MORNING.
CHANCE OF PCPN......60 PERCENT.
CHANCE OF THUNDER...19 PERCENT.
MAX TEMPERATURE.....AROUND 49.
MIN HUMIDITY........38 PERCENT.
MIN APPARENT TEMP...36.
SURFACE WINDS (MPH).WEST WINDS 13 TO 21 MPH WITH GUSTS TO AROUND 33
MPH.
WIND (20 FT)........WEST WINDS 10 TO 17 MPH WITH GUSTS TO AROUND 26
MPH. GUSTY AND ERRATIC WINDS EXPECTED NEAR
THUNDERSTORMS IN THE MORNING.
CEILING (KFT).......1.2 INCREASING TO 1.7 EARLY IN THE MORNING,
THEN INCREASING TO 3.1 LATE IN THE MORNING
INCREASING TO 8.3 LATE IN THE MORNING
INCREASING TO 15 EARLY IN THE
AFTERNOON INCREASING TO 22.
TIME (MDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........95 90 80 70 60 50 55 30 20 5 5
WEATHER COV.....LKY CHC CHC CHC SCH
WEATHER TYPE....RW RW RW RW RW
TSTM COV........SCH SCH SCH SCH SCH
CHC OF PCPN (%).60 50 40 30 10 10 0 0 0 0 0
CHC OF THDR (%).20 20 10 10 10 10 0 0 0 0 0
TEMP............45 44 43 44 44 45 46 47 48 48 48
RH..............86 87 88 81 75 66 57 49 43 39 38
WIND CHILL (F)..39 38 36 37 37 37 38 39 41 41 41
20 FT WIND DIR..SW SW W W W W W W W W W
20 FT WIND SPD..10 10 10 12 13 15 17 17 17 17 16
20 FT WIND GUST.19 19 19 20 22 24 25 26 26 25 23
SURFACE WND DIR.SW SW W W W W W W W W W
SURFACE WND SPD.13 13 13 15 16 19 21 21 21 21 20
SURFACE WND GST.24 24 24 25 28 30 31 32 33 31 29
CEILING (KFT)...1.2 1.7 3.1 8.3 6.4 15 16 22 25 25 25
TONIGHT
SKY/WEATHER.........CLEAR (0-10 PERCENT).
CHANCE OF PCPN......0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....AROUND 32.
MAX HUMIDITY........61 PERCENT.
MIN APPARENT TEMP...32.
SURFACE WINDS (MPH).WEST WINDS 11 TO 18 MPH WITH GUSTS TO AROUND 25
MPH UNTIL 2100, THEN LIGHT.
WIND (20 FT)........NORTHWEST WINDS 7 TO 12 MPH WITH GUSTS TO
AROUND 20 MPH UNTIL 2100, THEN LIGHT.
CEILING (KFT).......25.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........5 5 5 5 5 5 5 5 5 5 5 5
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
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 45 42 39 38 37 37 37 37 37 37 37
RH..............39 42 46 50 52 53 52 49 45 42 41 43
WIND CHILL (F)..42 38 36 33 33 32 32 32 32 32 32 32
20 FT WIND DIR..W W W W NW NW NW NW NW NW NW NW
20 FT WIND SPD..14 12 9 6 6 6 6 6 6 6 6 5
20 FT WIND GUST.20 17 14 12 10 8 8 8 8 10 8 8
SURFACE WND DIR.W W W W NW NW NW NW NW NW NW NW
SURFACE WND SPD.18 15 11 8 8 8 8 8 8 8 8 6
SURFACE WND GST.25 21 17 15 13 10 10 10 10 12 10 10
CEILING (KFT)...25 25 25 25 25 25 25 25 25 25 25 25
TUESDAY
SKY/WEATHER.........SUNNY (5-15 PERCENT).
CHANCE OF PCPN......0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....AROUND 50.
MIN HUMIDITY........34 PERCENT.
MIN APPARENT TEMP...26.
SURFACE WINDS (MPH).LIGHT WINDS UNTIL 0900. WINDS WEST AROUND 21
MPH WITH GUSTS TO AROUND 32 MPH AFTER 1600.
WIND (20 FT)........WEST WINDS 7 TO 17 MPH WITH GUSTS TO AROUND 11
MPH UNTIL 0800, THEN WEST 7 TO 16 MPH WITH
GUSTS TO AROUND 26 MPH.
CEILING (KFT).......25 EARLY IN THE MORNING.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........0 15 10 5 5 5 5 10 10 10 10 5
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
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............37 32 34 38 41 43 45 47 48 50 50 50
RH..............46 51 50 48 46 43 40 38 36 34 33 32
WIND CHILL (F)..32 26 27 32 35 36 38 41 41 44 43 43
20 FT WIND DIR..NW NW W W W W W W W W W W
20 FT WIND SPD..5 6 6 7 8 10 12 13 15 16 17 17
20 FT WIND GUST.7 11 13 14 17 19 21 23 25 26 26 25
SURFACE WND DIR.NW NW W W W W W W W W W W
SURFACE WND SPD.6 8 8 9 10 13 15 16 19 20 21 21
SURFACE WND GST.9 14 16 18 21 24 26 29 31 32 32 31
CEILING (KFT)...25
FORECAST DAYS 3 THROUGH 5
WEDNESDAY
MOSTLY CLEAR. LOWS IN THE LOWER 30S. HIGHS IN THE LOWER 50S.
LIGHT WINDS.
THURSDAY
MOSTLY CLEAR. LOWS IN THE MID 30S. HIGHS IN THE MID 50S. WEST
WINDS AROUND 8 MPH.
FRIDAY
PARTLY CLOUDY. LOWS IN THE UPPER 30S. HIGHS IN THE LOWER 50S.
WEST WINDS AROUND 12 MPH.
FORECASTER...LAVOIE
REQUESTED BY...JOEL KLOSTERMAN
TYPE OF REQUEST...SAR
.TAG 2621356.0/RIW
.DELDT 09/07/26
.FORMATTERVERSION 2.0.0
.EMAIL JKLOSTERMAN@TIPTOPSAR.COM
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