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Low-Pressure System Drives Thunderstorms and Fire Hazards in California

Showers will persist through Wednesday with drier air arriving on Thursday.

Thunderstorm clouds hover over Southern California. 
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Beaches along parts of the Orange County coast were cleared Tuesday afternoon as a lightning storm passed through, including the Huntington Beach Pier. (Photo by Jeff Gritchen/SCNG)

Overview

  • The National Weather Service says subtropical moisture and instability will fuel storms capable of cloud-to-ground lightning, heavy rain and small hail across mountain and desert regions.
  • Mountain ranges including Santa Barbara, Santa Monica, San Gabriel and San Jacinto have the highest thunderstorm probability with a 15–20% chance of storms drifting to coastal valleys.
  • Mixed dry and wet storms raise the risk of wildfire ignitions from dry lightning and debris flows in burn scars such as the Bridge Fire and Eaton Fire areas.
  • The system ingested smoke from Canadian wildfires, leading to hazy skies and orange-tinted sunrises and sunsets in Northern California.
  • After the system exits, high pressure will build and bring a gradual warming trend into the weekend alongside a return of overnight low clouds along the coast.