Montana Department of Transportation

Main Content

Accidents and Incidents Report

Yellowstone National Park Forecast

FPUS55 KRIW 191849
ZFPRIW

Zone Forecast Product for Western and Central Wyoming
National Weather Service Riverton WY
1248 PM MDT Tue Sep 19 2017

WYZ020-192200-
Natrona County Lower Elevations-
WYZ001-192200-
Yellowstone National Park-
Including the cities of Lake, Mammoth, and Old Faithful
1248 PM MDT Tue Sep 19 2017

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 9 PM MDT THIS
EVENING...

.REST OF TODAY...Breezy. Widespread snow showers, possibly mixed
with rain showers early in the afternoon, then widespread snow
showers, possibly mixed with rain showers and thunderstorms early
in the afternoon. New snow accumulation up to 2 inches. Highs
34 to 40. Southwest winds 15 to 20 mph. Chance of precipitation
80 percent. 
.TONIGHT...Breezy, cloudy. Numerous snow showers, possibly mixed
with rain showers early in the evening, then scattered snow
showers in the late evening and overnight. Snow accumulation
around 1 inch. Lows 22 to 28. Southwest winds 15 to 20 mph.
Chance of precipitation 60 percent. 
.WEDNESDAY...Breezy, cloudy. Scattered snow showers in the
morning, then numerous rain showers, possibly mixed with snow
showers in the afternoon. Snow accumulation up to 1 inch. Highs
36 to 42. Southwest winds 15 to 25 mph. Chance of precipitation
60 percent. 
.WEDNESDAY NIGHT...Breezy. Snow showers, possibly mixed with rain
showers in the evening, then snow showers likely, possibly mixed
with rain showers after midnight. Snow accumulation of 1 to
3 inches. Lows 27 to 33. Southwest winds 15 to 20 mph in the
evening. Chance of precipitation 70 percent. 
.THURSDAY...Mostly cloudy. Chance of snow showers in the morning,
then snow showers likely, possibly mixed with rain showers in the
afternoon. Snow accumulation of 1 to 2 inches. Highs 33 to 39.
Chance of precipitation 60 percent. 
.THURSDAY NIGHT...Snow showers likely. Moderate snow
accumulations. Lows in the mid 20s. Chance of snow 70 percent. 
.FRIDAY...Cloudy. Chance of snow in the morning, then chance of
rain, possibly mixed with snow in the afternoon. Light snow
accumulations. Highs 32 to 38. Chance of precipitation
50 percent. 
.FRIDAY NIGHT...Mostly cloudy. Chance of snow, possibly mixed
with rain in the evening, then chance of snow after midnight.
Lows 21 to 27. Chance of precipitation 30 percent. 
.SATURDAY...Mostly cloudy. Chance of snow in the morning, then
chance of rain and snow in the afternoon. Highs 32 to 38. Chance
of precipitation 30 percent. 
.SATURDAY NIGHT...Mostly cloudy. Slight chance of snow, possibly
mixed with rain in the evening, then slight chance of snow after
midnight. Lows 21 to 27. Chance of precipitation 20 percent. 
.SUNDAY...Mostly cloudy. Chance of snow in the morning, then
chance of snow, possibly mixed with rain in the afternoon. Highs
32 to 38. Chance of precipitation 30 percent. 
.SUNDAY NIGHT...Mostly cloudy with chance of snow, possibly mixed
with rain in the evening, then partly cloudy with slight chance
of snow after midnight. Lows 21 to 27. Chance of precipitation
30 percent. 
.MONDAY...Partly cloudy. Slight chance of snow in the morning,
then slight chance of rain in the afternoon. Highs 37 to 43.
Chance of precipitation 20 percent. 

--------------------------------