I just received the following in email from John Lindsey out at Diablo Canyon:
The PG&E Met Office in San Francisco has upgraded a Thunderstorm Watch to a Thunderstorm Warning for the Central Coast and inland areas today.
Thunderstorms developed this morning in the Bay Area, the Delta, and the Lower Sacramento Valley. A Tornado Warning was issued for Eastern Solano County, Yolo County, and Southwestern Sacramento County as radar indicated the development of a severe thunderstorm capable of producing a tornado 8 miles northwest of Rio Vista this morning.
Doppler radar at Vandenberg AFB shows a line of showers moving down the California coastline towards San Luis Obispo this morning. Showers and thunderstorms will continue to develop today due to unstable air aloft and surface heating. These thunderstorms will be accompanied by brief heavy rain, small hail, gusty surface winds, and lightning.



