Prolonged Atmospheric River Will Impact the Northwest Early this Week

A weather system in the Pacific Northwest will produce rain throughout the day, before a potent atmospheric river produces a prolonged round of heavy rainfall, widespread urban and river flooding, and high elevation snow to the region Monday through Wednesday. Showers and thunderstorms may produce isolated damaging winds, a brief tornado, and locally heavy rainfall across parts of Florida today. Read More >

Hazardous Weather Conditions

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

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

32°F

0°C

Humidity	69%
Wind Speed	S 8 MPH
Barometer	NA
Dewpoint	23°F (-5°C)
Visibility	NA
Wind Chill	25°F (-4°C)
Last update	08 Dec 03:15 AM MST

More Information:

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

Extended Forecast for

Mammoth WY

Winter Storm Warning December 8, 05:00pm until December 10, 05:00pm

Click here for hazard details and duration

Winter Storm Warning

Today
High: 40 °F
Mostly Cloudy
then Chance
Snow and
Breezy
Tonight
Low: 40 °F
Rain/Snow
Likely and
Breezy
Tuesday
High: 42 °F
Rain/Snow and
Breezy
Tuesday Night
Low: 32 °F
Snow then
Rain/Snow
Wednesday
High: 47 °F
Rain/Snow
then Rain
Likely and
Breezy
Wednesday Night
Low: 39 °F
Rain Likely
and Breezy
Thursday
High: 45 °F
Chance
Rain/Snow
Thursday Night
Low: 35 °F
Chance
Rain/Snow
Friday
High: 45 °F
Chance
Rain/Snow
then Slight
Chance Rain

Detailed Forecast

Today

A 30 percent chance of snow, mainly after 3pm. Mostly cloudy, with a high near 40. Breezy, with a southwest wind 10 to 15 mph, with gusts as high as 23 mph.

Tonight

A chance of snow before 8pm, then rain likely, possibly mixed with snow. Snow level rising to 6300 feet after midnight. Cloudy, with a steady temperature around 40. Breezy, with a southwest wind 15 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.

Tuesday

Rain and snow likely before 11am, then rain between 11am and 2pm, then rain and snow after 2pm. Snow level 6400 feet. High near 42. Breezy, with a southwest wind 13 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

Tuesday Night

Snow before 2am, then rain, possibly mixed with snow. Snow level rising to 6500 feet after midnight. Low around 32. Southwest wind around 11 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.

Wednesday

Rain, possibly mixed with snow, becoming all rain after 8am. High near 47. Breezy, with a southwest wind 13 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.

Wednesday Night

Rain likely, mainly before 11pm. Mostly cloudy, with a low around 39. Breezy, with a west southwest wind 11 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 60%.

Thursday

A chance of rain and snow. Mostly cloudy, with a high near 45. Southwest wind around 10 mph. Chance of precipitation is 50%.

Thursday Night

A chance of rain and snow. Mostly cloudy, with a low around 35. Chance of precipitation is 40%.

Friday

A chance of rain and snow before 11am, then a slight chance of rain. Partly sunny, with a high near 45. Chance of precipitation is 30%.

Friday Night

Mostly cloudy, with a low around 29.

Saturday

Partly sunny, with a high near 44.

Saturday Night

Partly cloudy, with a low around 27.