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Day 1 Convective Outlook  
NWS Storm Prediction Center Norman OK
0644 PM CST Fri Dec 20 2024

Valid 210100Z - 211200Z

...NO SEVERE THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Isolated thunderstorms are possible along the northern California
coast early morning Saturday.

...Northern CA coast...
An amplified upper trough will move northeast and approach the
Pacific Northwest coast through 12Z Saturday. This will yield a
pronounced low-level warm conveyor to overspread the adjacent
offshore waters. This forcing for ascent in conjunction with an
ample buoyancy plume has supported scattered to widespread
thunderstorms around 500-600 miles offshore. This buoyancy plume
will subside as it shifts towards the coast, but the northern
periphery of it should approach the northern CA coast, north of the
Bay Area. Forecast soundings indicate sufficient saturation will
occur between 650-800 mb to support scant to meager elevated
buoyancy near 12Z. Generally decaying thunderstorm activity should
approach the coast by this time, with isolated coverage expected.

..Grams.. 12/21/2024