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Accidents and Incidents Report

Yellowstone National Park Forecast

FPUS55 KRIW 180542
ZFPRIW

Zone Forecast Product for Western and Central Wyoming
National Weather Service Riverton WY
1040 PM MST Sat Feb 17 2018

WYZ020-181100-
Natrona County Lower Elevations-
WYZ001-181100-
Yellowstone National Park-
Including the cities of Lake, Mammoth, and Old Faithful
1040 PM MST Sat Feb 17 2018

...WINTER STORM WARNING IN EFFECT UNTIL 5 PM MST SUNDAY...

.REST OF TONIGHT...Windy. Snow showers in the late evening and
overnight, then snow early in the morning. Blowing snow late in
the evening. Areas of blowing snow after midnight. Snow may be
heavy at times late in the evening. New snow accumulation of 3 to
4 inches. Lows 11 to 17. Southwest winds 30 to 35 mph with gusts
to around 50 mph becoming west 15 to 20 mph. Chance of snow near
100 percent. 
.SUNDAY...Breezy, snow. Patchy blowing snow in the late morning
and afternoon. Snow accumulation of 3 to 4 inches. Highs 18 to
24. Southwest winds 15 to 20 mph. Chance of snow 90 percent. 
.SUNDAY NIGHT...Much colder. Patchy blowing snow early in the
evening. Cloudy with snow. Snow accumulation of 1 to 2 inches.
Lows 1 below to 9 below zero. Southwest winds around 15 mph early
in the evening. Chance of snow 90 percent. 
.WASHINGTONS BIRTHDAY...Mostly cloudy. Snow likely in the
morning, then chance of snow in the afternoon. Snow accumulation
up to 1 inch. Total snow accumulation 9 to 16 inches. Highs 4 to
12. Chance of snow 60 percent. Lowest wind chill readings
12 below to 22 below zero in the morning. 
.MONDAY NIGHT...Colder. Mostly cloudy with a 30 percent chance of
snow. Lows 12 below to 22 below zero. 
.TUESDAY...Mostly cloudy. Highs 4 to 10. Lowest wind chill
readings 36 below to 46 below zero in the morning. 
.TUESDAY NIGHT...Mostly cloudy with a 20 percent chance of snow.
Lows 8 below to 16 below zero. Wind chill readings 31 below to
41 below zero. 
.WEDNESDAY...Partly cloudy. A 20 percent chance of snow in the
morning. Highs 9 to 15. Lowest wind chill readings 31 below to
41 below zero in the morning. 
.WEDNESDAY NIGHT...Partly cloudy in the evening then becoming
mostly cloudy. A 30 percent chance of snow. Lows 4 below to
2 above zero. Wind chill readings 16 below to 26 below zero. 
.THURSDAY...Mostly cloudy with a 30 percent chance of snow. Highs
16 to 22. Lowest wind chill readings 15 below to 25 below zero in
the morning. 
.THURSDAY NIGHT...Mostly cloudy with a 30 percent chance of snow.
Lows zero to 6 above. Wind chill readings 10 below to 20 below
zero. 
.FRIDAY...Mostly cloudy with a 30 percent chance of snow. Highs
18 to 24. 
.FRIDAY NIGHT...Mostly cloudy with a 30 percent chance of snow.
Lows 4 to 10. 
.SATURDAY...Mostly cloudy with a 30 percent chance of snow. Highs
19 to 25. 

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