529
FNUS75 KRIW 061254
FWSRIW

Spot Forecast for Munger Piles RX...USFS
National Weather Service Riverton WY
554 AM MST Sat Dec 6 2025

Forecast is based on ignition time of 0800 MST on December 06.
If conditions become unrepresentative, contact the National Weather
Service

.DISCUSSION...

Light to moderate snow is forecast at ignition time/0800L and
continues into the overnight hours. The most likely time of moderate
snow/precipitation is between 0900L and 2000L. With temperatures
near to slightly above freezing, a wet snow is forecast with an
occasional rain/snow mix possible. Today`s snow accumulations will
be up to 1 inch (80% chance). Southwest sustained winds of 10 to 12
mph expected through 1300L. However, expect gusts of 15 to 20 mph to
persist throughout the entire day. Occasional fair to good smoke
dispersal and mixing heights from 1000L to 1500L. Light snow chances
again on Sunday with light winds from the south-southwest.

...Thunderstorms imply strong gusty and erratic winds...

.TODAY...

Sky/weather.........Mostly cloudy (75-85 percent). Chance of snow
                    showers early in the morning and through the
afternoon.
CWR.................8 percent.
Chance of pcpn......70 percent.
Chance of thunder...10 percent.
Max temperature.....Around 37.
Min humidity........67 percent.
Wind (20 ft)........West winds 7 to 10 mph with gusts to around 18
                    mph until 1600, then light.
Ridgetop wind.......Southwest 10 to 15 mph.
Mixing height.......4000 ft AGL until 1300, then 4500 ft AGL until
                    1600, then 2500 ft AGL.
Transport winds.....West 15 to 24 mph until 1700, then around 13
                    mph.
Smoke dispersal.....Poor until 0900, then fair until 1000, then
                    good until 1600, then poor.

TIME (MST)      8 AM      11 AM     2 PM      5 PM
Sky (%).........85        80        75        75
Weather cov.....CHANCE    LIKELY    LIKELY    LIKELY
Weather type....SNSHWR    SNSHWR    SNSHWR    SNSHWR
Tstm cov........                    S CHC
CWR.............10        10        10        10
Chc of pcpn (%).40        60        70        60
Chc of thdr (%).10        10        10        0
Temp............32        35        36        33
RH..............87        81        70        68
20 FT wind......SW 10     SW 9G14   W 7G14    W 6G11
Ridgetop wind...SW 15     SW 15     W 15      W 10
Mix hgt (ft)....2500      4000      4000      2000
Transport wind..W 20      W 24      W 21      W 13
SDspl kt-ft/100039        84        75        22

.TONIGHT...

Sky/weather.........Mostly cloudy (50-70 percent). Snow showers
                    likely in the evening and overnight.
CWR.................5 percent.
Chance of pcpn......60 percent.
Chance of thunder...2 percent.
Min temperature.....Around 16.
Max humidity........99 percent.
Wind (20 ft)........Light winds. Gusts up to 15 mph.
Ridgetop wind.......Southwest around 10 mph until 2400, then south.
Mixing height.......1500 ft AGL.
Transport winds.....West 10 to 13 mph until 0200, then south 10 to
                    12 mph.
Smoke dispersal.....Poor.

TIME (MST)      6 PM      9 PM      MIDNGT    3 AM
Sky (%).........70        55        50        60
Weather cov.....LIKELY    CHANCE    CHANCE    CHANCE
Weather type....SNSHWR    SNSHWR    SNSHWR    SNSHWR
Tstm cov........
CWR.............10        10        0         0
Chc of pcpn (%).60        30        30        30
Chc of thdr (%).0         0         0         0
Temp............31        27        24        19
RH..............73        81        85        87
20 FT wind......SW 5G10   W 5G11    S 5G10    SE 6G8
Ridgetop wind...SW 10     W 10      S 10      SE 10
Mix hgt (ft)....2000      1500      1500      1500
Transport wind..W 12      W 10      SW 10     S 12
SDspl kt-ft/100018        14        14        16

.SUNDAY...

Sky/weather.........Mostly cloudy (75-85 percent). Chance of snow
                    showers in the morning and afternoon.
CWR.................6 percent increasing to 46 percent late in the
                    afternoon.
Chance of pcpn......90 percent.
Chance of thunder...2 percent.
Max temperature.....Around 38.
Min humidity........68 percent.
Wind (20 ft)........Light winds.
Ridgetop wind.......South around 10 mph until 1000, then southwest.
Mixing height.......3000 ft AGL until 1300, then 3500 ft AGL.
Transport winds.....Southwest 9 to 13 mph.
Smoke dispersal.....Poor.

TIME (MST)      6 AM      9 AM      NOON      3 PM
Sky (%).........70        80        80        85
Weather cov.....CHANCE    CHANCE    LIKELY    LIKELY
Weather type....SNSHWR    SNSHWR    SNSHWR    SNSHWR
Tstm cov........
CWR.............10        10        10        10
Chc of pcpn (%).50        50        70        70
Chc of thdr (%).0         0         0         0
Temp............17        20        34        37
RH..............99        100       81        66
20 FT wind......SE 5G8    S 4G6     SW 4G8    SW 5G10
Ridgetop wind...SE 10     S 10      SW 10     SW 10
Mix hgt (ft)....1500      2000      3000      3000
Transport wind..S 10      S 9       SW 12     SW 12
SDspl kt-ft/100014        16        32        30

.FORECAST DAYS 3 THROUGH 5...
.MONDAY...
Snow showers and showers. Lows in the lower 20s. Highs in the
lower 40s. Light winds.
.TUESDAY...
Showers with snow showers likely. Lows around 30. Highs in the
mid 40s. Southwest winds around 9 mph.
.WEDNESDAY...
Showers and slight chance of snow showers. Lows in the lower 30s.
Highs in the upper 40s. Southwest winds around 11 mph.

$$
Forecaster...Gerhardt
Requested by...E Berman
Type of request...PRESCRIBED
.TAG 2527048.1/RIW
.DELDT 12/06/25
.FormatterVersion 2.0.0
.EMAIL eli.berman@usda.gov