Montana Department of Transportation

Malcolm “Mack” Long, Director

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Accidents and Incidents Report

Yellowstone National Park Forecast

FPUS55 KRIW 201550

ZFPRIW

FPUS55 KRIW 201549

ZFPRIW



Zone Forecast Product for Western and Central Wyoming

National Weather Service Riverton WY

949 AM MDT Mon Sep 20 2021



WYZ001-202200-

Yellowstone National Park-

Including the cities of Lake, Mammoth, and Old Faithful

949 AM MDT Mon Sep 20 2021



.REST OF TODAY...Mostly cloudy. Scattered snow showers, possibly

mixed with rain showers late in the morning, then numerous snow

showers, possibly mixed with rain showers and thunderstorms in

the afternoon. Little or no new snow accumulation. Highs 37 to

43. West winds 15 to 20 mph in the late morning and early

afternoon. Chance of precipitation 60 percent. 

.TONIGHT...Partly cloudy until early morning then clearing.

Scattered thunderstorms and snow showers, possibly mixed with

rain showers and early in the evening. Lows 21 to 27. Chance of

precipitation 30 percent. 

.TUESDAY...Not as cool. Mostly sunny. Highs 48 to 54. 

.TUESDAY NIGHT...Mostly clear. Lows 24 to 32. Southwest winds

around 15 mph in the evening. 

.WEDNESDAY...Breezy. Not as cool. Mostly sunny. Highs 55 to 63.

Southwest winds 15 to 20 mph. 

.WEDNESDAY NIGHT...Mostly clear in the evening then becoming

partly cloudy. Lows 29 to 35. 

.THURSDAY...Mostly sunny. Highs 54 to 62. 

.THURSDAY NIGHT...Mostly clear. Lows 31 to 37. 

.FRIDAY...Mostly sunny. Highs 60 to 66. 

.FRIDAY NIGHT...Mostly clear. Lows 32 to 38. 

.SATURDAY...Sunny. Highs 62 to 68. 

.SATURDAY NIGHT...Clear. Lows 33 to 39. 

.SUNDAY...Mostly sunny. Highs 61 to 67. 



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