Los Angeles, CA — An atmospheric river system is forecast to sweep into California next week, bringing heavy rainfall to coastal regions and snowfall to the Sierra Nevada mountains, according to the National Weather Service (NWS).
Meteorologists say the week-long weather event will begin around November 13, marking one of the season’s first widespread precipitation systems across the state.
Forecast Overview
The NWS long-range forecast shows that the heaviest rainfall will remain concentrated along the coast before pushing inland toward Arizona and Nevada. While the exact rainfall totals are still being monitored, forecasters warn of potential travel disruptions and localized flooding in lower-lying areas.
According to Victorville Daily Press, the storm is expected to strengthen over the Pacific Ocean before making landfall early next week.
“More information about the weather pattern will be available over the next few days,” weather experts said, noting that forecast models will be refined as the system develops.
Regional Temperature Outlook
Before the rain arrives, Southern California will continue to experience mild and warm autumn temperatures. Through November 13, high temperatures are expected to range between:
- 74°F to 79°F in the Victor Valley
- 70s and 80s in Barstow
- 60s in Big Bear Lake and Wrightwood
- Upper 70s to low 80s across much of the Inland Empire
“The pattern shift will be noticeable once the atmospheric river arrives, bringing cooler air, mountain snow, and widespread moisture,” forecasters said.
What Is an Atmospheric River?
An atmospheric river is a long, narrow band of moisture in the atmosphere capable of carrying large amounts of water vapor — sometimes more than the Mississippi River at its mouth. When that vapor hits land and condenses, it produces heavy rain or snow, depending on elevation.
California’s last few winters have seen several atmospheric rivers, which have been responsible for both drought relief and flood events in recent years.
Upcoming Weather Highlights
This year’s system is expected to reach California just after Veterans Day (November 11) and continue into the week of Thanksgiving (November 27). The Sierra Nevada region could see significant early-season snowfall, improving snowpack but also posing travel challenges in higher elevations.
As always, the National Weather Service advises residents to monitor local forecasts, prepare for changing conditions, and take precautions when driving in rain or snow.
What are your thoughts on this upcoming weather shift? Share your local experiences or storm preparations in the comments below.
