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NOAA's National Weather Service
Each location shows all alerts on one page
WARNINGS - WATCHES - ADVISORIES - STATEMENTS
Updates every 15 Minutes
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 WINTER STORM WARNING |
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| W. Slope N. Sierra | ||
| Effective: Mon, 12/22 10:15am | Severity: Severe | |
| Updated: December 23, 2025 12:31 am | Urgency: Expected | |
| Expires: Tue, 12/23 4:00pm | Certainty: Likely | |
| Areas Affected: Western Plumas County/Lassen Park - West Slope Northern Sierra Nevada | ||
Alert
Details:
* WHAT...Heavy snow expected. Accumulations up to a foot between 4500 to 5500 feet. 4 to 8 feet, with locally higher amounts above 5500 feet. Wind gusts up to 60 mph. * WHERE...West Slope Northern Sierra Nevada and Western Plumas County/Lassen Park Counties. * WHEN...From 10 PM Tuesday to 10 PM PST Friday. * IMPACTS...Dangerous travel conditions with chain controls and road closures. Localized tree damage, power outages, and low visibility due to the combination of heavy wet snow and strong winds. * ADDITIONAL DETAILS...Snow accumulations will remain near or above pass level through Tuesday, then drop to around 4500 to 5500 feet during the day Wednesday through Friday. Snowfall rates of 1 to 2 inches per hour at times. Information: Check the latest road conditions from Caltrans online at quickmap.dot.ca.gov or dial 5 1 1. |
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 FLOOD WATCH |
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| W. Slope N. Sierra | ||
| Effective: Mon, 12/22 1:30pm | Severity: Severe | |
| Updated: December 23, 2025 12:31 am | Urgency: Future | |
| Expires: Tue, 12/23 4:00pm | Certainty: Possible | |
| Areas Affected: Shasta Lake Area / Northern Shasta County - Burney Basin / Eastern Shasta County - Northern Sacramento Valley - Central Sacramento Valley - Southern Sacramento Valley - Carquinez Strait and Delta - Northern San Joaquin Valley - Mountains Southwestern Shasta County to Western Colusa County - Northeast Foothills/Sacramento Valley - Motherlode - Western Plumas County/Lassen Park - West Slope Northern Sierra Nevada | ||
Alert
Details:
* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of northern California, including the following areas, the Sacramento Valley, northern San Joaquin Valley, Delta region, Sierra Nevada and adjacent foothills, and Coastal Range. * WHEN...Through Friday afternoon. * IMPACTS...Excessive runoff will result in rises along area rivers, creeks, streams. Small streams and creeks may rise out of their banks. Flooding may occur in low-lying, poor drainage, and urban areas. Mudslides and rockslides may occur in mountain and foothill areas. * ADDITIONAL DETAILS... - Periods of moderate to heavy rain are forecast the week of Christmas. Debris flows are not expected over recent burn scars in northern California, but do anticipate enhanced runoff in/below scars. - http://www.weather.gov/safety/flood Information: You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop. |
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