National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Severe Thunderstorms and Flooding from the Southern Plains to the Great Lakes; Record Heat in the East

Widely scattered severe thunderstorms may produce damaging winds, hail, and flash flooding from the southern Plains into the lower Great Lakes. Elevated to locally critical fire weather conditions will persist across portions of the Southwest and Southern High Plains due to gusty winds and dry conditions. An early-season heatwave will challenge temperature records across the eastern U.S.. Read More >

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

Lat: 44.977222°NLon: 110.695278°WElev: 6138.0ft.

NA

50°F

10°C

Humidity 24%
Wind Speed ESE 5 MPH
Barometer NA
Dewpoint 14°F (-10°C)
Visibility NA
Wind Chill48°F (9°C)
Last update 19 May 12:15 PM MDT
Extended Forecast for

Norris WY

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 50. West southwest wind 9 to 11 mph, with gusts as high as 20 mph.

    High: 50 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 27. West southwest wind 8 to 13 mph becoming light and variable in the evening. Winds could gust as high as 20 mph.

    Low: 27 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of rain and snow showers between noon and 3pm, then rain showers likely. Some thunder is also possible. Partly sunny, with a high near 52. Calm wind becoming west southwest 5 to 9 mph in the morning. Winds could gust as high as 21 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.

    High: 52 °F

    Partly Sunny
    then
    Rain/Snow
    Likely

  • Wednesday Night

    Wednesday Night: Rain and snow showers, becoming all snow after 3am. Some thunder is also possible. Snow level 8600 feet lowering to 7600 feet after midnight . Low around 30. West wind 5 to 8 mph becoming calm in the evening. Winds could gust as high as 20 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    Low: 30 °F

    Rain/Snow

  • Thursday

    Thursday: Snow showers likely before 3pm, then a chance of rain and snow showers. Some thunder is also possible. Partly sunny, with a high near 49. Calm wind becoming north 5 to 7 mph in the morning. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 49 °F

    Snow Showers
    Likely then
    Chance
    Rain/Snow

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 27. North wind around 6 mph becoming calm in the evening.

    Low: 27 °F

    Partly Cloudy

  • Friday

    Friday: A chance of rain and snow showers after noon. Some thunder is also possible. Snow level rising to 8800 feet in the afternoon. Mostly sunny, with a high near 57. Calm wind becoming west southwest around 6 mph in the afternoon. Chance of precipitation is 30%.

    High: 57 °F

    Mostly Sunny
    then Chance
    Rain/Snow

  • Friday Night

    Friday Night: Partly cloudy, with a low around 31.

    Low: 31 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 63.

    High: 63 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 50. West southwest wind 9 to 11 mph, with gusts as high as 20 mph.
Tonight
Mostly cloudy, with a low around 27. West southwest wind 8 to 13 mph becoming light and variable in the evening. Winds could gust as high as 20 mph.
Wednesday
A chance of rain and snow showers between noon and 3pm, then rain showers likely. Some thunder is also possible. Partly sunny, with a high near 52. Calm wind becoming west southwest 5 to 9 mph in the morning. Winds could gust as high as 21 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.
Wednesday Night
Rain and snow showers, becoming all snow after 3am. Some thunder is also possible. Snow level 8600 feet lowering to 7600 feet after midnight . Low around 30. West wind 5 to 8 mph becoming calm in the evening. Winds could gust as high as 20 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Thursday
Snow showers likely before 3pm, then a chance of rain and snow showers. Some thunder is also possible. Partly sunny, with a high near 49. Calm wind becoming north 5 to 7 mph in the morning. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Thursday Night
Partly cloudy, with a low around 27. North wind around 6 mph becoming calm in the evening.
Friday
A chance of rain and snow showers after noon. Some thunder is also possible. Snow level rising to 8800 feet in the afternoon. Mostly sunny, with a high near 57. Calm wind becoming west southwest around 6 mph in the afternoon. Chance of precipitation is 30%.
Friday Night
Partly cloudy, with a low around 31.
Saturday
Mostly sunny, with a high near 63.
Saturday Night
A 10 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 34.
Sunday
Mostly sunny, with a high near 67.
Sunday Night
Partly cloudy, with a low around 37.
Memorial Day
Sunny, with a high near 69.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Norris WY
 44.72°N 110.71°W (Elev. 7585 ft)
Last Update:
11:47 am MDT May 19, 2026
Forecast Valid:
12pm MDT May 19, 2026-6pm MDT May 25, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation