Heavy Rainfall to Bring Flooding Threat to California; Heavy Snow in the Sierra

A strong atmospheric river will bring heavy rainfall to California through the holiday week. The heaviest rainfall is expected on Wednesday in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall is expected in the Sierra Nevada from the atmospheric river, raising concerns for major snow‐load impacts. Travel may be difficult to impossible over the passes. 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.

37°F

3°C

Humidity	66%
Wind Speed	S 7 MPH
Barometer	NA
Dewpoint	27°F (-3°C)
Visibility	NA
Wind Chill	32°F (0°C)
Last update	24 Dec 02:15 AM MST

More Information:

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

Extended Forecast for

16 Miles W Gardiner MT

Overnight
Low: 27 °F
Partly Cloudy
Wednesday
High: 36 °F
Breezy.
Mostly Sunny
then Snow
Likely
Wednesday Night
Low: 30 °F
Breezy.
Rain/Snow
then Snow
Christmas Day
High: 32 °F
Snow then
Chance Snow
Thursday Night
Low: 25 °F
Snow Likely
Friday
High: 28 °F
Snow and
Breezy
Friday Night
Low: 14 °F
Chance Snow
and Breezy
Saturday
High: 19 °F
Chance Snow
Saturday Night
Low: 3 °F
Partly Cloudy

Detailed Forecast

Overnight

Partly cloudy, with a low around 27. South wind 10 to 13 mph, with gusts as high as 20 mph.

Wednesday

Snow likely, mainly after 3pm. Partly sunny, with a high near 36. Breezy, with a south wind 16 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

Wednesday Night

Snow, possibly mixed with rain, becoming all snow after midnight. Low around 30. Breezy, with a south wind 14 to 23 mph, with gusts as high as 34 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.

Christmas Day

Snow, mainly before 11am. High near 32. South southwest wind 10 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.

Thursday Night

Snow likely, mainly after 11pm. Mostly cloudy, with a low around 25. South southwest wind around 11 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

Friday

Snow. High near 28. Breezy, with a south southwest wind 13 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 80%.

Friday Night

A 30 percent chance of snow. Mostly cloudy, with a low around 14. Breezy, with a southwest wind 11 to 15 mph, with gusts as high as 23 mph.

Saturday

A 50 percent chance of snow. Partly sunny, with a high near 19.

Saturday Night

Partly cloudy, with a low around 3.

Sunday

Partly sunny, with a high near 19.

Sunday Night

Mostly cloudy, with a low around 7.