Severe Thunderstorms in Portions of the Mississippi Valley and Great Lakes

A few severe thunderstorms with large hail, are expected across parts of the middle and upper Mississippi River Valley tonight through early morning. Snow and a wintry mix overnight in the Upper Midwest into the Great Lakes can cause hazardous travel conditions. Fire weather concerns continue for a large portion of the central and southern High Plains and Four Corners region this evening. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

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

31°F

-1°C

Humidity	97%
Wind Speed	NNW 0 MPH
Barometer	NA
Dewpoint	30°F (-1°C)
Visibility	NA
Last update	31 Mar 12:15 AM MDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

Mammoth WY

Overnight
Low: 31 °F
Snow Showers
Likely
Tuesday
High: 50 °F
Rain/Snow
Tuesday Night
Low: 37 °F
Rain/Snow
then Chance
Rain/Snow
Wednesday
High: 52 °F
Chance
Rain/Snow
then Showers
Wednesday Night
Low: 39 °F
Showers
Thursday
High: 45 °F
Rain/Snow
then Snow
Showers and
Breezy
Thursday Night
Low: 29 °F
Snow Showers
Friday
High: 42 °F
Snow Showers
Likely
Friday Night
Low: 26 °F
Slight Chance
Snow Showers
then Partly
Cloudy

Detailed Forecast

Overnight

Snow showers likely, mainly after 5am. Mostly cloudy, with a low around 31. Northwest wind around 5 mph becoming calm. Chance of precipitation is 70%. Total nighttime snow accumulation of less than a half inch possible.

Tuesday

Rain, possibly mixed with snow showers, becoming all rain after 5pm. Some thunder is also possible. Snow level rising to 7800 feet in the afternoon. High near 50. Light and variable wind becoming south southwest 5 to 10 mph in the morning. Winds could gust as high as 25 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

Tuesday Night

Rain and snow showers before 1am, then a chance of rain showers between 1am and 2am, then a chance of rain and snow showers after 2am. Some thunder is also possible. Snow level 7700 feet lowering to 6200 feet after midnight . Low around 37. South southwest wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.

Wednesday

A chance of rain and snow showers before 9am, then rain showers. Some thunder is also possible. Snow level 6200 feet rising to 7400 feet in the afternoon. High near 52. Calm wind becoming southwest 5 to 8 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.

Wednesday Night

Showers and possibly a thunderstorm. Low around 39. South wind around 10 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Thursday

Rain and snow showers, becoming all snow after noon. Some thunder is also possible. High near 45. Breezy, with a south southwest wind 10 to 15 mph, with gusts as high as 31 mph. Chance of precipitation is 100%.

Thursday Night

Snow showers. Low around 29. Southwest wind 7 to 14 mph becoming west northwest after midnight. Winds could gust as high as 29 mph. Chance of precipitation is 90%.

Friday

Snow showers likely, mainly before noon. Mostly cloudy, with a high near 42. Chance of precipitation is 70%.

Friday Night

A 20 percent chance of snow showers before midnight. Mostly cloudy, with a low around 26.

Saturday

Sunny, with a high near 51.

Saturday Night

Mostly clear, with a low around 30.

Sunday

Sunny, with a high near 56.

Sunday Night

Partly cloudy, with a low around 33.