August 4, 2012 - Red flag warning now in effect from 2 pm this afternoon to 11 am Sunday for dry thunderstorms.
Low pressure off the California coast will pivot a small weather disturbance northward across Northern California this afternoon through Sunday. The combination of instability and monsoon moisture will bring isolated to scattered mountain and even valley thunderstorms.
Initially, these storms could contain little rainfall and may continue to produce little or no rainfall through the duration of the event. Dry thunderstorms combined with very dry fuels will bring the potential for critical fire conditions this afternoon through Sunday over the Sierra Nevada, Southern Cascades, Foothills, Shasta County and Coastal Mountains.
Monsoonal moisture moving up from the south will bring the possibility of initially dry thunderstorms to interior Northern California late Saturday through Sunday morning. Isolated thunderstorms are possible in the Central Valley and Sierra foothills with scattered thunderstorms in the Sierra, Cascades, and Coastal Mountains.
A Red Flag Warning has been issued for the higher elevations as lightning strikes with little to no rain pose increased fire danger. Thunderstorms will diminish across the area Sunday morning from southwest to northeast as drier air moves into the region.
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