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Waterspout · Eastern Pacific

Waterspout October 11, 2012 · San Mateo Pt To Mexican Bdr Out 30nm, Eastern Pacific

Where the report was made, with tornadoes recorded within 15 miles over the years.

What the National Weather Service wrote

Numerous pilot reports received of waterspouts off the coast in the vicinity of North Island and Imperial Beach.

The wider storm

A strong upper-level low pressure system dug south along the west coast, moving inland directly over southern California. A vorticity maximum rotating around the low, along with the setup of a California Bight Coastal Convergence Zone (between drainage winds off the land and onshore flow from the low) created the perfect conditions for showers, thunderstorms and funnel clouds. The cold air instability and warm waters resulted in waterspouts over the coastal waters during the morning hours.

Began near Point Loma (32.6198, -117.2193).

Source: NOAA Storm Events Database, event 415338. Narratives are written by the National Weather Service forecast office that issued the report.

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