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
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