Montana Department of Transportation

Main Content

Accidents and Incidents Report

Yellowstone National Park Forecast

FPUS55 KRIW 230750
ZFPRIW

Zone Forecast Product for Western and Central Wyoming
National Weather Service Riverton WY
149 AM MDT Wed May 23 2018

WYZ020-231000-
Natrona County Lower Elevations-
WYZ001-231000-
Yellowstone National Park-
Including the cities of Lake, Mammoth, and Old Faithful
149 AM MDT Wed May 23 2018.REST OF TONIGHT...Rain showers likely and slight chance of
thunderstorms after midnight, then rain showers likely early in
the morning. Lows 35 to 41. Chance of precipitation 70 percent. 
.WEDNESDAY...Patchy fog early in the morning. Numerous rain
showers in the morning, then numerous rain showers and isolated
thunderstorms in the afternoon. Some thunderstorms may produce
gusty winds, and small hail in the afternoon. Highs 46 to 52.
Southwest winds around 15 mph in the afternoon. Chance of
precipitation 70 percent. 
.WEDNESDAY NIGHT...Mostly cloudy. Scattered rain showers and
isolated thunderstorms in the evening, then isolated rain showers
after midnight. Some thunderstorms may produce gusty winds, and
small hail in the evening. Lows 35 to 41. Chance of precipitation
50 percent. 
.THURSDAY...Not as cool. Mostly cloudy in the morning, then
partly cloudy with chance of rain showers and slight chance of
thunderstorms in the afternoon. Highs 55 to 63. Southwest winds
around 15 mph. Chance of precipitation 30 percent. 
.THURSDAY NIGHT...Partly cloudy. Chance of rain showers and
slight chance of thunderstorms in the evening. Lows 35 to 41.
Chance of precipitation 30 percent. 
.FRIDAY...Partly cloudy. A 20 percent chance of rain showers and
thunderstorms in the afternoon. Highs 60 to 68. 
.FRIDAY NIGHT...Mostly clear. Lows 34 to 40. 
.SATURDAY...Partly cloudy in the morning, then mostly cloudy with
a 30 percent chance of rain showers in the afternoon. Highs 59 to
67. 
.SATURDAY NIGHT...Mostly cloudy in the evening then becoming
partly cloudy. A 30 percent chance of rain showers and
thunderstorms. Lows 35 to 41. 
.SUNDAY...Partly cloudy with chance of rain showers and slight
chance of thunderstorms in the morning, then mostly cloudy with
rain showers likely and chance of thunderstorms in the afternoon.
Highs 54 to 62. Chance of precipitation 60 percent. 
.SUNDAY NIGHT...Mostly cloudy. Chance of rain showers and slight
chance of thunderstorms in the evening. Lows 34 to 40. Chance of
precipitation 30 percent. 
.MEMORIAL DAY...Mostly cloudy. Chance of rain showers in the
morning, then chance of rain showers and thunderstorms in the
afternoon. Highs 55 to 63. Chance of precipitation 40 percent. 
.MONDAY NIGHT...Mostly cloudy. Chance of rain showers and slight
chance of thunderstorms in the evening, then chance of rain
showers after midnight. Lows 34 to 40. Chance of precipitation
30 percent. 
.TUESDAY...Mostly cloudy. Chance of rain showers in the morning,
then chance of rain showers and thunderstorms in the afternoon.
Highs 51 to 59. Chance of precipitation 30 percent. 

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