River Flooding Continues to be a Concern for Multiple Regions across the Country

Recent rainfall has increased the threat of Moderate to Major flooding along rivers in the Mid-Atlantic, especially Virginia and Maryland, over the next few days. Rainfall combined with snowmelt is also fueling Moderate-to-Major flooding in the northern Rockies and northern Intermountain West. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

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Current conditions at

MAMMOTH AT YELLOWSTONE NP (YLAW4)

Lat: 44.97722°NLon: 110.69528°WElev: 6127ft.

59°F

15°C

Humidity	58%
Wind Speed	W 4 G 4 MPH
Barometer	NA
Dewpoint	44°F (7°C)
Visibility	NA
Last update	20 May 8:15 pm MDT

More Information:

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

Extended Forecast for

Mammoth WY

Tonight

Mostly Cloudy
Low: 39 °F
Monday

Partly Sunny
then Heavy
Rain
High: 64 °F
Monday
Night

Heavy Rain
Low: 39 °F
Tuesday

Mostly Sunny
then Heavy
Rain
High: 64 °F
Tuesday
Night

Heavy Rain
Low: 41 °F
Wednesday

Heavy Rain
High: 60 °F
Wednesday
Night

Heavy Rain
Low: 42 °F
Thursday

Slight Chance
Showers then
Slight Chance
T-storms
High: 62 °F
Thursday
Night

Slight Chance
T-storms then
Slight Chance
Showers
Low: 42 °F

Detailed Forecast

Tonight

Mostly cloudy, with a low around 39. South southeast wind 5 to 7 mph.

Monday

Scattered showers and thunderstorms after 1pm. Some of the storms could produce small hail, gusty winds, and heavy rain. Partly sunny, with a high near 64. Southeast wind around 7 mph. Chance of precipitation is 30%.

Monday Night

Scattered showers and thunderstorms before 10pm, then isolated showers between 10pm and 1am. Some of the storms could produce small hail, gusty winds, and heavy rain. Mostly cloudy, with a low around 39. West wind around 6 mph becoming light and variable in the evening. Chance of precipitation is 30%.

Tuesday

Scattered showers and thunderstorms after 1pm. Some of the storms could produce small hail, gusty winds, and heavy rain. Partly sunny, with a high near 64. Light and variable wind becoming northeast 5 to 7 mph in the morning. Chance of precipitation is 40%.

Tuesday Night

Scattered showers and thunderstorms before 1am, then isolated showers. Some of the storms could produce small hail, gusty winds, and heavy rain. Mostly cloudy, with a low around 41. Northeast wind 5 to 8 mph becoming east southeast in the evening. Chance of precipitation is 40%.

Wednesday

Scattered showers, with thunderstorms also possible after 1pm. Some of the storms could produce small hail, gusty winds, and heavy rain. Cloudy, with a high near 60. Light and variable wind becoming south southwest 5 to 8 mph in the morning. Chance of precipitation is 40%.

Wednesday Night

Scattered showers and thunderstorms before 1am. Some of the storms could produce small hail, gusty winds, and heavy rain. Mostly cloudy, with a low around 42. South southwest wind 5 to 8 mph. Chance of precipitation is 40%.

Thursday

A slight chance of showers between 7am and 1pm, then a slight chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 62. Chance of precipitation is 20%.

Thursday Night

A slight chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 1am. Mostly cloudy, with a low around 42. Chance of precipitation is 20%.

Friday

A 30 percent chance of showers after 1pm. Mostly sunny, with a high near 67.

Friday Night

A chance of showers. Partly cloudy, with a low around 41.

Saturday

Sunny, with a high near 71.

Saturday Night

A slight chance of showers. Partly cloudy, with a low around 42.

Sunday

A slight chance of showers. Mostly sunny, with a high near 67.