Sacramento, CA – Isolated thunderstorms are expected to develop over parts of Northern California this weekend, according to the National Weather Service. The greatest risks will occur in the Sierra Nevada and far northern counties, with impacts stretching into Nevada.
According to the US National Weather Service in Sacramento, Saturday, September 20, carries the highest storm probabilities near Burney at 24%, with scattered risks of 10–20% across Susanville, East Quincy, Mammoth Lakes, and Tonopah. Coastal and valley cities such as San Francisco, Sacramento, and Stockton face much lower chances, generally 1–3%.
By Sunday, September 21, storm activity is forecast to shift slightly eastward, with elevated risks near Elko, Nevada (32%), and Battle Mountain (22%). Interior Northern California, including Reno, Carson City, and South Lake Tahoe, shows probabilities of 11–16%.
The NWS notes the most likely timeframe for thunderstorms will be between 12 p.m. and 8 p.m., when daytime heating peaks. While not every location will see activity, residents in higher elevations and along the Sierra should remain alert for sudden lightning, brief heavy rain, and gusty winds.
Drivers on mountain highways, including I-80 and US-50, could face brief delays if storms develop. Outdoor recreationists are advised to monitor weather conditions closely and seek shelter at the first sign of thunder.
This article was produced by a journalist and may include AI-assisted input. All content is reviewed for accuracy and fairness.
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