Active Weather Alerts
Flood Advisory
Issued: 9:02 AM Dec. 22, 2025 – National Weather Service
...FLOOD ADVISORY IN EFFECT UNTIL 4 AM PST EARLY THIS MORNING... * WHAT...Flooding caused by excessive rainfall is is being reported by CHP within Sonoma County along Mark West Creek. * WHERE...West Central Napa County in northern California... East Central Sonoma County in northern California... * Until 400 AM PST. * IMPACTS...Minor flooding in low-lying and poor drainage areas. Rises in small streams and normally dry arroyos. CHP reports indicate flooding over roadways in the vicinity of Mark West Creek. * ADDITIONAL DETAILS... - At 1259 AM PST, Doppler radar indicated light moderate rain. Minor flooding is already occurring near smaller creeks and streams. Flooding over the roadway may be harder to see at night. If you encounter a flooded roadway, turn around, don't drown! - Minor flooding is expected to continue as the main rain band shifts northward. Additional rainfall up to 0.5" is possible. - Some locations that will experience flooding include... Santa Rosa, Rohnert Park, Sebastopol, Cotati, St. Helena, Calistoga, Roseland, South Santa Rosa Cdp, Larkfield-Wikiup, South Santa Rosa, Graton and Deer Park. - http://www.weather.gov/safety/flood PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be especially cautious at night when it is harder to recognize the dangers of flooding. Be aware of your surroundings and do not drive on flooded roads. &&
Flood Advisory
Issued: 8:24 AM Dec. 22, 2025 – National Weather Service
...FLOOD ADVISORY IN EFFECT UNTIL 715 AM PST THIS MORNING... * WHAT...Urban area and small stream flooding caused by excessive rainfall upstream along the Russian River has resulted in the Russian River at Geyserville reaching minor flood stage. * WHERE...North Central Sonoma County in northern California... * Until 715 AM PST Monday. * IMPACTS...Minor flooding in low-lying and poor drainage areas along the Russian River between Geyserville and Jimtown is expected. At minor flood stage, water may begin to inundate the lowest floodplain locations on left (east) bank of the Russian River at Geyserville. * ADDITIONAL DETAILS... - At 1217 AM PST, The Russian River at Geyserville reports the river has risen to minor flood stage as of 11:30 PM PST on 21 December. The Russian River is expected to crest around 40.5 ft (minor flood stage) by 3 AM PST with minor flooding to persist through at least 7 AM PST. This is a result of excessive rainfall upstream along the Russian River with the river gauge at Russian River at Hopland reporting the river is in minor flood stage. - Flooding is most likely in the lowest lying areas within the vicinity of the Russian River from Geyserville to Jimtown. Light rain will continue through the afternoon with additional amounts up to 0.5 inches expected. Moderate to heavy rain returns tonight into Tuesday. - Some locations that will experience flooding include...Low lying areas along the Russian River extending from Geyserville to Jimtown. - http://www.weather.gov/safety/flood PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be especially cautious at night when it is harder to recognize the dangers of flooding. Be aware of your surroundings and do not drive on flooded roads. &&
Flood Watch
Issued: 5:35 AM Dec. 22, 2025 – National Weather Service
...FLOOD WATCH REMAINS IN EFFECT THROUGH MONDAY AFTERNOON... * WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...Northern San Francisco Bay Area (Napa, Sonoma, and Marin counties). * WHEN...Through Monday afternoon. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks. Low water crossing may become flooded. Standing water is likely in urban areas. * ADDITIONAL DETAILS... - Moderate to heavy rain associated with an atmospheric river will impact the region. An additional 0.25-1.0" of rain is expected in the valleys during the watch period, with up to 1.25" in the coastal mountains. Area rivers, streams, and creeks that are prone to flooding could see rapid rises during and after heavy rainfall. There is a slight chance for flash flooding, particularly in urban areas through Monday afternoon. Debris flows are possible particularly for the Pickett Burn Scar. - http://www.weather.gov/safety/flood PRECAUTIONARY/PREPAREDNESS ACTIONS... 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. &&
High Wind Watch
Issued: 4:49 AM Dec. 22, 2025 – National Weather Service
...HIGH WIND WATCH IN EFFECT FROM TUESDAY EVENING THROUGH EARLY WEDNESDAY MORNING... * WHAT...South winds 20 to 30 mph with gusts up to 60 mph possible. * WHERE...The Bay Area, The Central Coast, The Santa Clara Valley and Eastern Hills, The Salinas and Carmel Valleys and Hollister Area, The Santa Cruz Mountains, and San Francisco Peninsula Coast. * WHEN...From Tuesday evening through early Wednesday morning. * IMPACTS...Damaging winds could down trees, snap power lines, and result in property damage. Widespread power outages are possible. Travel could be extremely difficult and hazardous, especially for high profile vehicles. The combination of wind and moist soils will increase the risk for downed trees. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates. Secure loose outdoor objects that could be blown around or damaged by the wind. &&
Storm Watch
Issued: 4:40 AM Dec. 22, 2025 – National Weather Service
...GALE WARNING IN EFFECT FROM 9 AM TO 3 PM PST TUESDAY... ...STORM WATCH IN EFFECT FROM TUESDAY AFTERNOON THROUGH LATE TUESDAY NIGHT... * WHAT...For the Gale Warning, southeast winds 15 to 25 kt with gusts up to 40 kt expected. For the Storm Watch, southeast winds 25 to 30 kt with gusts up to 55 kt and seas 9 to 12 ft possible. * WHERE...Coastal Waters from Point Arena to Point Reyes California out to 10 NM. * WHEN...For the Gale Warning, from 9 AM to 3 PM PST Tuesday. For the Storm Watch, from Tuesday afternoon through late Tuesday night. * IMPACTS...Storm force winds and hazardous seas could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should prepare to remain in port, alter course, and/or secure the vessel before the onset of severe conditions. &&
Gale Warning
Issued: 4:40 AM Dec. 22, 2025 – National Weather Service
...GALE WARNING IN EFFECT FROM 9 AM TO 3 PM PST TUESDAY... ...STORM WATCH IN EFFECT FROM TUESDAY AFTERNOON THROUGH LATE TUESDAY NIGHT... * WHAT...For the Gale Warning, southeast winds 15 to 25 kt with gusts up to 40 kt expected. For the Storm Watch, southeast winds 25 to 30 kt with gusts up to 55 kt and seas 9 to 12 ft possible. * WHERE...Coastal Waters from Point Arena to Point Reyes California out to 10 NM. * WHEN...For the Gale Warning, from 9 AM to 3 PM PST Tuesday. For the Storm Watch, from Tuesday afternoon through late Tuesday night. * IMPACTS...Storm force winds and hazardous seas could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should prepare to remain in port, alter course, and/or secure the vessel before the onset of severe conditions. &&
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