Heavy Rainfall and Flooding in the Mid-Atlantic; Heat and Wildfire Concerns in the West

Slow moving showers and thunderstorms may result in flash flooding for portions of the mid-Atlantic region through tonight. Meanwhile, excessive heat will continue to build across the West through Tuesday. Heat Advisories and Extreme Heat Warnings are in effect. Fire Weather concerns continue for the West with dry and breezy conditions. Watching the tropics across the Southeast. 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.

64°F

18°C

Humidity	40%
Wind Speed	SW 2 MPH
Barometer	NA
Dewpoint	39°F (4°C)
Visibility	NA
Last update	15 Jul 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: 53 °F
Partly Cloudy
Tuesday
High: 79 °F
Sunny then
Showers
Tuesday Night
Low: 50 °F
Showers then
Scattered
Showers
Wednesday
High: 76 °F
Chance
Showers then
Chance
T-storms
Wednesday Night
Low: 48 °F
Mostly Clear
Thursday
High: 85 °F
Sunny
Thursday Night
Low: 51 °F
Mostly Clear
Friday
High: 86 °F
Sunny then
Slight Chance
T-storms
Friday Night
Low: 52 °F
Partly Cloudy

Detailed Forecast

Overnight

Partly cloudy, with a low around 53. West wind around 6 mph becoming light and variable.

Tuesday

Scattered showers and thunderstorms between noon and 3pm, then showers and possibly a thunderstorm after 3pm. High near 79. Light north wind becoming northwest 6 to 11 mph in the morning. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tuesday Night

Showers and possibly a thunderstorm before midnight, then scattered showers and thunderstorms between midnight and 3am, then scattered showers after 3am. Low around 50. Northwest wind around 9 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Wednesday

A chance of showers, with thunderstorms also possible after noon. Mostly cloudy, then gradually becoming sunny, with a high near 76. Northwest wind 5 to 8 mph. Chance of precipitation is 30%.

Wednesday Night

Mostly clear, with a low around 48. Northwest wind 5 to 8 mph becoming southeast after midnight.

Thursday

Sunny, with a high near 85. South southeast wind 6 to 11 mph becoming west southwest in the afternoon. Winds could gust as high as 24 mph.

Thursday Night

Mostly clear, with a low around 51. South wind 5 to 9 mph.

Friday

A 20 percent chance of showers and thunderstorms after noon. Sunny, with a high near 86.

Friday Night

Partly cloudy, with a low around 52.

Saturday

A 10 percent chance of showers and thunderstorms after noon. Sunny, with a high near 86.