Bomb cyclone heading into Northern California this weekend


FOX40 Chief Meteorologist Kristina Werner and Dennis Shanahan join in team weather coverage Sunday. Adam Epstein will have your Monday morning update.  

SACRAMENTO, Calif. (KTXL) — The storm that will bring heavy rain and gusty winds into the area Sunday into Monday will undergo the process of bombogenesis.

This occurs when a midlatitude cyclone rapidly intensifies, dropping at least 24 millibars over 24 hours. A millibar measures atmospheric pressure. The lower the pressure, the stronger the storm.

The storm is forecast to drop from 984mb to 942mb from 4 p.m. Saturday to 4 p.m Sunday. Once this happens, it will be classified as a bomb cyclone.

Winds off the coast of Oregon will gust 70-90 mph, which is as strong as a Category 1 hurricane. 

In turn, the winds will create offshore waves of 40-50 feet in the Pacific. This will cause shipping disruptions, rough surf and beach erosion. Along the Pacific Northwest coastline, waves will be 10-20 feet high.

In Northern California, the bomb cyclone will provide us with 2-4 inches of rain and gusts of 30-40 mph on Sunday. Snow levels will drop Sunday night into Monday, allowing for 1-3 feet of snow above 6,000 feet in elevation.

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