Valley highs will warm to the mid to upper 90s this afternoon, just slightly cooler than yesterday.

We'll likely see some pop up thunderstorms this afternoon but most if not all activity will stay confined to the crest of the Sierra and southern Cascades and east into Nevada.

The big concern this weekend will be a cut-off low that will setup off to our southwest Saturday night into Tuesday morning.  Cut-off lows to our southwest in August are notorious for thunderstorm outbreaks in the Northstate.  FIRE WEATHER WATCHES have already been issued for Trinity, Siskiyou & Modoc County with likely more counties added as we get closer.

Precipitable water values are forecast to be on the high side so thunderstorms should drop moderate to heavy rain.  However, thunderstorms may start out on the dry side.  The speed of these thunderstorms will also be a concern.  Thunderstorms will be moving northwest over 20 mph, which will limit the amount of rainfall in locations.

Low will lift to the northeast by Tuesday afternoon, ending our chances for widespread thunderstorms.