Red Flag Warning issued September 12 at 3:07PM PDT until September 12 at 8:00PM PDT by NWS

...Abundant lightning expected today in parts of Northern California and Southern Oregon... .Low pressure to the south off the coast of California will push moisture up to the north through today. This will help generate scattered thunderstorms across Northern California and areas east of the Cascades. These thunderstorms are expected to be wet.

from Current Watches, Warnings and Advisories for the United States Issued by the National Weather Service http://ift.tt/2xj9pv2