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Cut-Off Low Delivers Lightning to California and Spreads Storms Coast to Coast, With Drying by Friday

The pattern shift replaces late‑September heat with cooler, more humid air, elevating a dry‑lightning fire risk in the Bay Area.

Overview

  • Overnight lightning and downpours hit Southern California, with Ventura seeing strikes as the cut‑off low moved north and expanded showers into the Central Coast and Bay Area.
  • Central Coast forecasters call for wet thunderstorms and locally up to about an inch of rain in the Santa Lucias, while a drier lower atmosphere brings a dry‑lightning wildfire risk in parts of the Bay Area.
  • Bay Area highs tumble roughly 20 degrees from Tuesday’s heat as clouds and cooler marine air arrive, with scattered storms possible through Thursday morning.
  • Ahead of an advancing front, storms are forecast from the Gulf Coast to the Southeast and Mid‑Atlantic, including Atlanta where gusts could reach about 60 mph and a second round is likely Thursday.
  • Showers and thunderstorms are expected across the Midwest and Northeast into Thursday—Maine could see 1–2 inches—before lower humidity and more seasonable, drier conditions spread in Friday into the weekend.