Expires:202512222300;;047218
FPUS55 KRIW 222134
ZFPRIW

Zone Forecast Product for Western and Central Wyoming
National Weather Service Riverton WY
231 PM MST Mon Dec 22 2025


WYZ001-222300-
Yellowstone National Park-
Including the cities of Lake, Mammoth, and Old Faithful
232 PM MST Mon Dec 22 2025

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

.THIS AFTERNOON...Numerous snow and rain showers. Snow
accumulation up to 4 inches. Breezy. Near steady temperature in
the mid 30s. Southwest winds 15 to 20 mph with gusts up to
45 mph. Chance of precipitation 60 percent. 
.TONIGHT...Snow showers. Scattered rain showers after midnight.
Storm total snow accumulation of 2 to 4 inches. Breezy with lows
around 30. Southwest winds 15 to 20 mph with gusts up to 40 mph.
Chance of precipitation 80 percent. 
.TUESDAY...Mostly cloudy. Scattered snow showers in the morning.
Highs in the upper 30s. South winds 10 to 15 mph with gusts up to
35 mph. Chance of snow 30 percent. 
.TUESDAY NIGHT...Partly cloudy and breezy. Lows in the upper 20s.
South winds 15 to 20 mph with gusts up to 35 mph. 
.WEDNESDAY...Partly cloudy in the morning, then mostly cloudy
with rain and snow showers likely in the afternoon. Little or no
snow accumulation. Breezy with highs in the upper 30s. South
winds 15 to 20 mph with gusts up to 40 mph. Chance of
precipitation 60 percent. 
.WEDNESDAY NIGHT...Rain and snow showers. Light snow
accumulation. Breezy with lows in the lower 30s. Chance of
precipitation 90 percent. 
.CHRISTMAS DAY...Snow showers. Rain showers in the morning, then
a slight chance of thunderstorms in the afternoon. New light snow
accumulation. Breezy with highs in the mid 30s. Chance of
precipitation near 100 percent. 
.THURSDAY NIGHT...A slight chance of thunderstorms. A chance of
snow showers in the evening, then snow showers after midnight.
New light snow accumulation. Lows in the lower 20s. Chance of
snow 90 percent. 
.FRIDAY...Snow showers. New light snow accumulation. Breezy with
highs in the upper 20s. Chance of snow near 100 percent. 
.FRIDAY NIGHT...Cloudy with snow showers likely. New little or no
snow accumulation. Breezy, cold with lows 10 to 15. Chance of
snow 70 percent. 
.SATURDAY...Mostly cloudy with a 50 percent chance of snow
showers. Little or no snow accumulation. Highs in the lower 20s. 
.SATURDAY NIGHT...Partly cloudy. Cold with lows zero to 10 above
zero. 
.SUNDAY...Mostly cloudy in the morning, then becoming partly
cloudy. Highs in the mid 20s. 

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