National Weather Service United States Department of Commerce

Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

Another day of above normal, record temperatures along with gusty winds across the Wind Corridor (Rock Springs to Johnson County). Rain showers will develop over western portions late in the afternoon, with snow levels of 8000-9000ft. Strong to high winds will return over the Wind Corridor late tonight.
Snow continues overnight and through Friday morning, mainly for the higher elevations. Lower valleys should remain all rain, and if any snow, will be minimal. Main impacts to any travel over Togwotee and Teton Passes.
Above average temperatures expected on Christmas with more near record afternoon highs east of the Divide. Enjoy it while it lasts as a cool down is in store for the weekend. Merry Christmas! #WyWx #MerryChristmas