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Late-April Storm Brings Rain and Thunderstorm Risk to Bay Area

A cutoff low off the California coast is set to deliver scattered showers, gusty winds, isolated thunderstorms, and mountain snow Friday into Saturday.

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The exact location and strength of an upper-level low pressure system on Friday will determine how much precipitation falls throughout the region. 

Overview

  • The Bay Area will see light rain starting late Friday, with most areas receiving less than a tenth of an inch and higher elevations potentially seeing up to 0.25 inches.
  • Forecasts indicate a small chance (under 15%) of isolated thunderstorms, with possible pea-sized hail and lightning strikes in select areas.
  • Onshore winds are expected to strengthen, with gusts reaching 25–35 mph through coastal gaps and ridgelines, contributing to cooler and cloudier conditions.
  • Snow levels in the Sierra Nevada will drop to 5,000–6,000 feet, with 1–2 inches of slushy snow likely in passes and higher elevations seeing several inches.
  • The storm's impacts will vary regionally, with the Central Coast and Southern California forecasted to experience more significant rain and thunderstorm activity compared to the Bay Area.