Spot Forecast
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
486
FNUS75 KRIW 080301
FWSRIW
Spot Forecast for Telephone Island...DOI
National Weather Service Riverton WY
901 PM MDT Sun Jun 7 2026
Forecast is based on forecast start time of 0600 MDT on June 08.
If conditions become unrepresentative, contact the National Weather
Service
.DISCUSSION...
Winds will be light from the north Monday morning, turning to the
southwest after 1000. Winds will then increase after 1200, with
gusts up to 25 mph between 1300 and 1800. Skies will become mostly
cloudy by this time, with winds decreasing through the rest of the
evening and becoming light (less than 10 mph) after sunset. There
is a 10 to 20% chance for a passing rain shower between 1600 and
2000. Winds will increase again after 0200, with gusts 15-20 mph
through sunrise Tuesday morning. Light rain showers will also be
possible during this time, with low confidence in a wetting rain.
West-southwest winds, with gusts of 30 to 40 mph, will be in place
after 1100 Tuesday. Showers and thunderstorms will be possible
across the area through the afternoon, but confidence is low for
the site to be directly impacted. Winds turn more northwesterly
after 1900, as a cold front moves over the area and decrease
through 0000 with gusts up to 15 mph remaining steady through the
rest of the night.
...Thunderstorms imply strong gusty and erratic winds...
.MONDAY...
Sky/weather.........Mostly sunny (45-55 percent) then becoming
mostly cloudy (70-80 percent) late in the
afternoon.
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of thunder...3 percent.
Max temperature.....Around 80.
Min humidity........14 percent.
Wind (20 ft)........Light winds until 1300, then southwest 7 to 12
mph with gusts to around 19 mph.
Ridgetop wind.......Light winds until 1100, then southwest 10 to 15
mph until 1500, then around 20 mph.
Mixing height.......1500 ft AGL until 1000, then 4000 ft AGL until
1200, then 6000 ft AGL until 1300, then 9000 ft
AGL until 1400, then 13000 ft AGL until 1700,
then 11000 ft AGL.
Transport winds.....North around 7 mph until 0900, then light until
1000, then southwest 7 to 9 mph until 1200,
then 17 to 23 mph until 1400, then 28 to 29
mph.
Smoke dispersal.....Poor until 1200, then good until 1300, then
excellent.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........55 60 60 40 40 55 50 40 35 40 55 75
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 0 0 0 0 0 0
Chc of thdr (%).0 0 0 0 0 0 0 0 0 0 0 0
Temp............39 43 48 54 63 69 72 76 78 78 80 78
RH..............57 51 42 35 29 24 20 17 16 15 15 15
20 FT wind dir..N N N N SW SW W W SW SW SW SW
20 FT wind spd..2 2 2 1 2 3 5 7 10 11 11 12
20 FT wind gust.4 5 4 2 5 7 10 14 18 19 19 18
Ridge wind dir..N N N N SW SW W W SW SW SW SW
Ridge wind spd..5 5 5 5 5 10 10 15 15 20 20 20
Mix hgt (kft)...0.5 0.5 1.0 1.5 2.5 4.0 6.0 9.0 12 13 13 11
Transp wind dir.N N NE N SW SW SW SW SW SW SW SW
Transp wind spd.7 7 7 6 7 9 17 23 28 29 29 28
SDspl kt-ft/10003 3 7 8 14 30 90 180 278 320 310 260
.MONDAY NIGHT...
Sky/weather.........Mostly cloudy (80-90 percent).
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of thunder...0 percent.
Min temperature.....Around 49.
Max humidity........34 percent.
Wind (20 ft)........Southwest winds 8 to 11 mph with gusts to
around 18 mph until 2000, then light until
0300, then southwest 7 to 8 mph with gusts to
around 14 mph.
Ridgetop wind.......Southwest 15 to 20 mph until 2100, then west
around 10 mph until 2200, then light until
2400, then southwest 10 to 15 mph.
Mixing height.......11000 ft AGL until 1900, then 9000 ft AGL until
2000, then 2500 ft AGL until 2200, then 500 ft
AGL until 0400, then 3000 ft AGL until 0500,
then 6000 ft AGL.
Transport winds.....Southwest 23 to 28 mph until 2000, then 9 to 17
mph.
Smoke dispersal.....Excellent until 2000, then fair until 2100,
then poor until 0400, then fair until 0500,
then good.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........70 80 95 95 95 95 95 95 95 95 95 95
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 0 0 0 0 0 0
Chc of thdr (%).0 0 0 0 0 0 0 0 0 0 0 0
Temp............78 78 75 68 64 61 59 58 57 54 54 54
RH..............14 15 15 21 25 28 30 31 32 32 32 33
20 FT wind dir..SW W SW W W S S S SW SW SW SW
20 FT wind spd..11 8 6 3 2 2 4 6 6 7 7 8
20 FT wind gust.18 14 12 6 6 6 8 11 13 14 14 14
Ridge wind dir..SW W SW W W S S S SW SW SW SW
Ridge wind spd..20 15 15 10 5 5 10 10 15 15 15 15
Mix hgt (kft)...11 9.0 4.0 2.5 1.5 1.0 0.5 0.5 1.5 1.5 3.0 6.0
Transp wind dir.SW SW W W SW SW SW SW SW SW SW W
Transp wind spd.28 23 16 12 9 9 10 13 14 15 16 17
SDspl kt-ft/1000260 182 55 24 13 8 6 7 19 18 45 93
.TUESDAY...
Sky/weather.........Mostly cloudy (75-85 percent) then becoming
mostly sunny (40-50 percent).
CWR.................0 percent.
Chance of pcpn......10 percent.
Chance of thunder...12 percent.
Max temperature.....Around 73.
Min humidity........24 percent.
Wind (20 ft)........Southwest winds 8 to 17 mph with gusts to
around 25 mph until 1300, then west 19 to 22
mph with gusts to around 30 mph. Gusty and
erratic winds expected near thunderstorms in
the afternoon.
Ridgetop wind.......Southwest 15 to 20 mph until 1100, then west 25
to 30 mph.
Mixing height.......2000 ft AGL until 0800. 9500 ft AGL after 1400.
Transport winds.....West 16 to 24 mph until 1200, then 29 to 36
mph.
Smoke dispersal.....Poor until 0700. Excellent after 1500.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........95 100 90 75 75 70 70 65 60 55 50 40
Weather cov..... SCH SCH SCH SCH SCH SCH
Weather type.... RW RW RW RW RW RW
Tstm cov........ SCH SCH SCH SCH SCH SCH
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............51 54 57 61 64 68 71 72 71 71 70 69
RH..............34 34 33 31 29 26 24 24 24 25 25 25
20 FT wind dir..SW SW W W W W W W W W W W
20 FT wind spd..8 9 10 11 13 16 17 19 20 21 22 22
20 FT wind gust.16 16 17 18 19 22 25 26 29 30 30 30
Ridge wind dir..SW SW W W W W W W W W W W
Ridge wind spd..15 15 15 20 20 25 25 30 30 30 30 30
Mix hgt (kft)...1.0 2.0 3.0 4.0 5.5 7.5 9.0 9.0 9.5 9.5 9.0 9.0
Transp wind dir.SW W W W W W W W W W W W
Transp wind spd.16 16 17 18 21 24 29 31 33 36 36 35
SDspl kt-ft/100013 27 45 66 103 154 223 247 271 295 285 266
.FORECAST DAYS 3 THROUGH 5...
.WEDNESDAY...
Mostly clear. Lows in the mid 30s. Highs in the upper 60s. West
winds around 15 mph.
.THURSDAY...
Clear. Lows in the lower 30s. Highs in the mid 70s. West winds
around 11 mph.
.FRIDAY...
Clear. Lows in the upper 30s. Highs around 80. West winds around
8 mph.
$$
Forecaster...LaVoie
Requested by...Sean Kerney
Type of request...WILDFIRE
.TAG 2615151.0/RIW
.DELDT 06/07/26
.FormatterVersion 2.0.0
.EMAIL skerney@blm.gov,jbraun@blm.gov