Two atmospheric rivers (ARs) are forecast to bring significant rain to the U.S. West Coast on January 30 and 31, 2025, with the potential for heavy precipitation as a second AR overtakes the first and stalls into early next week.
Southern California saw its first significant rainfall in weeks on January 26, 2025, bringing much-needed relief from wildfires but also triggering flash floods and debris flows across Los Angeles County.
The National Weather Service (NWS) has issued a Freeze Warning and a Frost Advisory for parts of the San Francisco Bay Area as winter storm brings freezing temperatures to the region.
Southern California is bracing for a weekend storm that could cause flash flooding and landslides in areas scarred by January’s wildfires, with rain and snow expected to bring relief but also new risks.
Much-needed rains are forecast for Southern California this weekend as a low-pressure system impacts the state heavily affected by devastating wildfires.
Southern California’s wildfire risk is reaching critical levels on Monday, January 20, 2025, with forecasters cautioning that dry vegetation and powerful winds could create the perfect conditions for fast-spreading, unpredictable fires. Potential impacts from this event include downed trees and power outages, very rapid and erratic fire spread, dangerous driving conditions and travel delays, especially for high-profile vehicles, and hazardous sea conditions with potential breaking waves for Avalon Harbor. If you live in affected region and haven’t prepared already, now is the time to act.
A strong high-pressure system developing over parts of the Great Basin is forecast to set up major Santa Ana winds over southern California starting on Tuesday, January 7, 2025, with an Extremely Critical Outlook being issued for parts of Los Angeles and Ventura counties.
A series of atmospheric rivers (ARs) is forecast to bring heavy precipitation, flooding risks, and winter storm impacts to the U.S. West Coast this week, with the first AR making landfall on Tuesday, December 17, 2024. The fourth and fifth ARs are forecast to make landfall on December 21 and 22. Up to 500 mm (20 inches) of rain expected in some areas and significant streamflow rises in western Washington and Oregon.
San Francisco experienced its first-ever Tornado Warning on Saturday morning, December 14, 2024, issued as a powerful storm system swept through the region with heavy rain and strong winds.
The Center for Western Weather and Water Extremes has warned of an intense winter storm impacting the Southern Sierra Nevada and parts of the Intermountain West from November 25 to 28, 2024. Forecasts indicate over 180 mm (7 inches) of precipitation and snow accumulations exceeding 1.5 m (5 feet) at higher elevations, with flash flood and winter storm warnings in effect.
