Montana Department of Transportation

Malcolm “Mack” Long, Director

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Accidents and Incidents Report

Yellowstone National Park Forecast

FPUS55 KRIW 080334

ZFPRIW

FPUS55 KRIW 080333

ZFPRIW



Zone Forecast Product for Western and Central Wyoming

National Weather Service Riverton WY

933 PM MDT Fri May 7 2021



WYZ001-081000-

Yellowstone National Park-

Including the cities of Lake, Mammoth, and Old Faithful

933 PM MDT Fri May 7 2021



.REST OF TONIGHT...Breezy, cloudy. Numerous rain showers and

isolated thunderstorms late in the evening. Numerous snow showers

through the night. Scattered rain showers after midnight. Snow

accumulation of 1 to 2 inches. Lows 21 to 27. Southwest winds

15 to 25 mph. Chance of precipitation 60 percent. 

.SATURDAY...Breezy. Mostly cloudy. Scattered snow showers in the

morning, then numerous snow showers and isolated thunderstorms in

the afternoon. Snow accumulation up to 1 inch. Total snow

accumulation 1 to 3 inches. Highs 31 to 37. West winds 15 to

20 mph. Chance of precipitation 60 percent. 

.SATURDAY NIGHT...Mostly cloudy early in the evening then

becoming partly cloudy. Scattered snow showers and isolated

thunderstorms early in the evening, then scattered snow showers

in the late evening and overnight. Lows 17 to 23. West winds

around 15 mph in the evening. Chance of precipitation 30 percent.

.SUNDAY...Partly cloudy with chance of snow showers in the

morning, then mostly cloudy with snow showers likely and slight

chance of thunderstorms in the afternoon. Little or no snow

accumulation. Highs 35 to 41. Chance of precipitation 60 percent.

.SUNDAY NIGHT...Mostly cloudy. Chance of snow showers and slight

chance of thunderstorms in the evening, then slight chance of

snow showers after midnight. Lows around 21. Chance of

precipitation 30 percent. 

.MONDAY...Mostly cloudy. Chance of snow showers in the morning,

then snow showers and slight chance of thunderstorms in the

afternoon. Highs 39 to 45. Chance of precipitation 80 percent. 

.MONDAY NIGHT...Mostly cloudy with a 30 percent chance of snow

showers in the evening, then partly cloudy after midnight. Lows

in the lower 20s. 

.TUESDAY...Partly cloudy. Chance of snow showers in the morning,

then snow showers likely, possibly mixed with rain showers and

thunderstorms in the afternoon. Highs 43 to 49. Chance of

precipitation 60 percent. 

.TUESDAY NIGHT...Partly cloudy in the evening then clearing. Lows

in the mid 20s. 

.WEDNESDAY...Partly cloudy. A 20 percent chance of rain showers

in the afternoon. Highs 50 to 56. 

.WEDNESDAY NIGHT...Partly cloudy. Lows around 30. 

.THURSDAY...Partly cloudy. A 20 percent chance of rain showers in

the afternoon. Highs 51 to 59. 

.THURSDAY NIGHT...Partly cloudy. A 20 percent chance of rain

showers in the evening. Lows in the lower 30s. 

.FRIDAY...Partly cloudy. Chance of rain showers and slight chance

of thunderstorms in the afternoon. Highs 50 to 56. Chance of

precipitation 40 percent. 



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