Heavy Rain From the Central Plains to the Mid-Atlantic; Heat Wave Begins This Weekend

Strong to severe thunderstorms and heavy rain will impact portions of the central Plains into the Upper Midwest and the Mid-Atlantic through the weekend. A stretch of unusually hot and humid weather is expected across portions of the central U.S. and the Southeast beginning this weekend and continuing through next week. The heat may reach dangerous levels, particularly mid to late next week. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

MAMMOTH AT YELLOWSTONE NP (YLAW4)

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

62°F

17°C

Humidity	54%
Wind Speed	SSE 7 MPH
Barometer	NA
Dewpoint	45°F (7°C)
Visibility	NA
Last update	18 Jul 10:15 PM MDT

More Information:

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

Extended Forecast for

Mammoth WY

Tonight
Low: 51 °F
Mostly Clear
Saturday
High: 83 °F
Sunny then
Mostly Sunny
and Breezy
Saturday Night
Low: 51 °F
Partly Cloudy
and Breezy
then Mostly
Clear
Sunday
High: 84 °F
Sunny then
Slight Chance
T-storms and
Breezy
Sunday Night
Low: 52 °F
Partly Cloudy
Monday
High: 85 °F
Mostly Sunny
then Slight
Chance
T-storms and
Breezy
Monday Night
Low: 51 °F
Partly Cloudy
Tuesday
High: 83 °F
Mostly Sunny
then Chance
T-storms
Tuesday Night
Low: 51 °F
Slight Chance
T-storms then
Mostly Clear

Detailed Forecast

Tonight

Mostly clear, with a low around 51. South southeast wind around 9 mph.

Saturday

Mostly sunny, with a high near 83. Breezy, with a south wind 7 to 16 mph becoming west southwest in the afternoon. Winds could gust as high as 29 mph.

Saturday Night

Partly cloudy, with a low around 51. Breezy, with a west southwest wind 6 to 15 mph becoming south after midnight. Winds could gust as high as 26 mph.

Sunday

A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 84. Breezy, with a south wind 6 to 15 mph becoming west southwest in the afternoon. Winds could gust as high as 26 mph.

Sunday Night

Partly cloudy, with a low around 52. West southwest wind 5 to 10 mph becoming south southeast after midnight. Winds could gust as high as 22 mph.

Monday

A slight chance of showers between noon and 3pm, then a slight chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 85. Breezy, with a south southeast wind 5 to 10 mph becoming west southwest 11 to 16 mph in the afternoon. Winds could gust as high as 29 mph. Chance of precipitation is 20%.

Monday Night

Partly cloudy, with a low around 51. West southwest wind 6 to 13 mph becoming south after midnight. Winds could gust as high as 23 mph.

Tuesday

A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 83.

Tuesday Night

A 10 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 51.

Wednesday

A 20 percent chance of showers and thunderstorms after noon. Sunny, with a high near 85.

Wednesday Night

A slight chance of showers and thunderstorms. Mostly clear, with a low around 52.

Thursday

A slight chance of showers and thunderstorms. Sunny, with a high near 86.