Dangerous Heat Builds and Expands; Critical Fire Weather for the Southwest; Severe Thunderstorms for Plains and Midwest

Dangerous to record breaking heat will build across the center of the nation and slowly build eastward this week. Wildfire conditions remain critical for the Southwest and portions of the Great Basin through Monday. For the northern Plains and upper Midwest, severe thunderstorms with the potential for large to very large hail and severe winds are the primary hazards. Read More >

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

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

42°F

6°C

Humidity	74%
Wind Speed	S 4 MPH
Barometer	NA
Dewpoint	34°F (1°C)
Visibility	NA
Wind Chill	40°F (4°C)
Last update	29 Jun 12:15 AM MDT

More Information:

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

Extended Forecast for

Mammoth Hot Springs WY

Overnight
Low: 41 °F
Showers
Monday
High: 51 °F
Breezy.
Rain/Snow
then Showers
Monday Night
Low: 42 °F
Chance
Showers then
Mostly Cloudy
Tuesday
High: 68 °F
Mostly Sunny
then Chance
T-storms
Tuesday Night
Low: 42 °F
Partly Cloudy
Wednesday
High: 71 °F
Sunny then
Chance
T-storms
Wednesday Night
Low: 43 °F
Slight Chance
T-storms then
Partly Cloudy
Thursday
High: 73 °F
Mostly Sunny
Thursday Night
Low: 46 °F
Partly Cloudy

Detailed Forecast

Overnight

Showers, mainly after 2am. Steady temperature around 41. South wind 8 to 11 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.

Monday

Rain, possibly mixed with snow showers, becoming all rain after noon. Some thunder is also possible. High near 51. Breezy, with a south southwest wind 19 to 24 mph becoming west southwest 10 to 15 mph. Winds could gust as high as 38 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.

Monday Night

A 40 percent chance of showers and thunderstorms, mainly before 8pm. Mostly cloudy, with a low around 42. South southwest wind 7 to 10 mph becoming southeast after midnight. Winds could gust as high as 24 mph.

Tuesday

A 30 percent chance of showers and thunderstorms, mainly between 4pm and 5pm. Mostly cloudy through mid morning, then becoming sunny, with a high near 68. South southeast wind 5 to 8 mph becoming southwest in the afternoon.

Tuesday Night

Partly cloudy, with a low around 42. Southwest wind 5 to 8 mph becoming south southeast after midnight. Winds could gust as high as 20 mph.

Wednesday

A 30 percent chance of showers and thunderstorms after noon. Sunny, with a high near 71. South southeast wind 5 to 11 mph becoming southwest in the afternoon. Winds could gust as high as 23 mph.

Wednesday Night

A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 43. Southwest wind 5 to 9 mph becoming south southeast after midnight. Winds could gust as high as 22 mph.

Thursday

Mostly sunny, with a high near 73.

Thursday Night

Partly cloudy, with a low around 46.

Friday

A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 75.

Friday Night

A chance of showers and thunderstorms. Mostly cloudy, with a low around 46.

Independence Day

A slight chance of showers and thunderstorms. Sunny, with a high near 75.

Saturday Night

Mostly clear, with a low around 46.