A fire weather warning is in place through 6pm tonight for much of the region. The only exception is the immediate coastline. This warning does include West Side Valleys and has been issued to account for the lightning anticipated for Friday.
Monsoonal moisture over much of the West continues to filter in from our south, but this combined with an upper level low just off the coast of Northern California will allow for a good deal of instability and moisture to fuel scattered thunderstorms. The main threats are going to be heavy rain, frequent lightning, strong winds and small hail.
Showers are already moving in from our south as early as 6am. Heavy rain is coming down in the Mt. Shasta area, and these showers will continue spreading north. Our best best for thunder and lightning is going to be late morning through mid afternoon. Shower activity will die down tonight around sunset.
We’ll keep around a chance for isolated storms east of the Cascades into the weekend. The temperatures will become the big weather story by Sunday. In fact, an extreme heat wave is likely into next week. Consecutive triple digit days look to be Sunday through Wednesday/Thursday. This will be for Siskiyou County and West Side Valleys. In addition to that, more monsoonal moisture will bring thunderstorms back into the region by midweek.
Meteorologist Alyssa Caroprese