National Weather Service United States Department of Commerce

Atmospheric River Continues Areas of Heavy Rain and Snow for California This Weekend

An atmospheric river will continue to bring gusty winds, moderate to heavy rainfall, and potential flooding to southern California and the southern Great Basin through Sunday. Periods of heavy snow will continue as well above 7,000 feet over the Sierra Nevada mountains associated with this atmospheric river. Read More >

 
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The Pre-Duty Controller Weather Briefing is designed to increase controller situational awareness. It is produced by the Center Weather Service Unit three times daily. After hours or during changing weather this briefing may not represent the latest information. This product does not replace pilot pre-flight briefings.

 

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.AVIATION /06Z SATURDAY THROUGH WEDNESDAY/... A few sprinkles are possible today as a warm front lifts across, with a shower or two possible tonight as a cold front swings by. A rumble of thunder can't be ruled out, but both thunder and impactful precipitation chances appear too low at the moment to even include a PROB30 group at any of the TAF sites. Some LLWS is possible if surface winds go light or maintain a more S/SE component into the evening as winds increase and veer aloft. Otherwise SE to S and eventually SW winds are expected through tonight, becoming W late. Winds will start light, but a few gusts around 15 knots are possible this afternoon. By this evening, southerly gusts of 15-20 knots become more likely, though gusts may be occasional given reduced diurnal mixing. Once the cold front crosses, an uptick in wind gusts is likely. Blustery conditions are expected on both Sunday and Monday with a relative minimum during the overnight hours. An initial wave of gusts is possible (25-35 knots) Sunday morning in the wake of the cold front and as diurnal mixing increases. Gusts may level off a bit before increasing again later in the day into the early evening as a secondary front surges through. Gusts to around 40 knots may be possible during this time. Monday will be breezy as well with 20-30 knot gusts likely. All of this is out of a west to northwest direction. High pressure building in Monday night will cause winds to become much lighter. Sub-VFR ceilings and rain appear possible at times during the day Tuesday. VFR conditions will return for Wednesday. Winds are expected to be light and variable on Tuesday, and then light out of the north on Wednesday. AVIATION...DHOF/KJP Update as of: 205 AM EST Sat Nov 15 2025

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