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Yellowstone National Park, CA Weather Forecast
Wx Discussion - Wx Hazards - Wx Aviation
NWS Forecast for Old Faithful WY
National Weather Service Forecast for: Old Faithful WY
Issued by: National Weather Service Riverton, WY
Updated: 8:29 pm MDT May 20, 2025
 
Tonight

Tonight: A 40 percent chance of snow showers, mainly before 1am.  Mostly cloudy, with a low around 27. Calm wind.  Total nighttime snow accumulation of less than a half inch possible.
Chance Snow
Showers
Wednesday

Wednesday: Partly sunny, with a high near 48. Light south southwest wind becoming west southwest 5 to 10 mph in the morning.
Partly Sunny

Wednesday
Night
Wednesday Night: Partly cloudy, with a low around 28. Southwest wind 5 to 9 mph becoming light and variable  after midnight.
Partly Cloudy

Thursday

Thursday: A chance of showers between noon and 3pm, then a chance of showers and thunderstorms after 3pm.  Snow level rising to 9900 feet in the afternoon. Mostly cloudy, with a high near 59. Calm wind becoming south southwest 5 to 8 mph in the morning. Winds could gust as high as 22 mph.  Chance of precipitation is 40%.
Mostly Cloudy
then Chance
T-storms
Thursday
Night
Thursday Night: A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight.  Partly cloudy, with a low around 31. Southwest wind around 6 mph becoming calm  in the evening. Winds could gust as high as 21 mph.  Chance of precipitation is 30%.
Chance
Showers then
Mostly Clear
Friday

Friday: A 20 percent chance of showers after noon.  Sunny, with a high near 60. Calm wind becoming southwest around 6 mph in the afternoon.
Sunny then
Slight Chance
Showers
Friday
Night
Friday Night: A 40 percent chance of showers, mainly before midnight.  Mostly cloudy, with a low around 32. Light south wind.
Chance
Showers
Saturday

Saturday: A chance of showers, then showers likely and possibly a thunderstorm after noon.  Partly sunny, with a high near 56. Chance of precipitation is 60%.
Showers
Likely
Saturday
Night
Saturday Night: A 30 percent chance of showers before midnight.  Partly cloudy, with a low around 29.
Chance
Showers then
Mostly Clear
Lo 27 °F Hi 48 °F Lo 28 °F Hi 59 °F Lo 31 °F Hi 60 °F Lo 32 °F Hi 56 °F Lo 29 °F

Hazardous Weather Outlook
 

Tonight
 
A 40 percent chance of snow showers, mainly before 1am. Mostly cloudy, with a low around 27. Calm wind. Total nighttime snow accumulation of less than a half inch possible.
Wednesday
 
Partly sunny, with a high near 48. Light south southwest wind becoming west southwest 5 to 10 mph in the morning.
Wednesday Night
 
Partly cloudy, with a low around 28. Southwest wind 5 to 9 mph becoming light and variable after midnight.
Thursday
 
A chance of showers between noon and 3pm, then a chance of showers and thunderstorms after 3pm. Snow level rising to 9900 feet in the afternoon. Mostly cloudy, with a high near 59. Calm wind becoming south southwest 5 to 8 mph in the morning. Winds could gust as high as 22 mph. Chance of precipitation is 40%.
Thursday Night
 
A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Partly cloudy, with a low around 31. Southwest wind around 6 mph becoming calm in the evening. Winds could gust as high as 21 mph. Chance of precipitation is 30%.
Friday
 
A 20 percent chance of showers after noon. Sunny, with a high near 60. Calm wind becoming southwest around 6 mph in the afternoon.
Friday Night
 
A 40 percent chance of showers, mainly before midnight. Mostly cloudy, with a low around 32. Light south wind.
Saturday
 
A chance of showers, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 56. Chance of precipitation is 60%.
Saturday Night
 
A 30 percent chance of showers before midnight. Partly cloudy, with a low around 29.
Sunday
 
A 20 percent chance of showers after noon. Sunny, with a high near 63.
Sunday Night
 
Mostly clear, with a low around 33.
Memorial Day
 
Sunny, with a high near 69.
Monday Night
 
A slight chance of showers. Mostly clear, with a low around 37.
Tuesday
 
A chance of showers. Sunny, with a high near 70.

 

Forecast from NOAA-NWS for Old Faithful WY.

Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather






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