A weather disturbance acted upon a lingering warm and moist air mass from a storm which passed through the area a week earlier. Thunderstorms developed over San Francisco and Marin Counties causing minor flooding.
Every event with a place to put it; 2 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS MTR wrote it up.
A weather disturbance acted upon a lingering warm and moist air mass from a storm which passed through the area a week earlier. Thunderstorms developed over San Francisco and Marin Counties causing minor flooding.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS San Francisco Bay Area, CA wrote its last area forecast discussion before the first event at Oct 26, 1:50 PM PST, 21 hours 10 minutes earlier.
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</html>The national radar mosaic for the moment the first event began.
3 high wind. Local standard time, as filed.
At about 11:20 a.m. PDT a 75-ffot eucalyptus tree fell onto a townhouse complex in East San Jose along the 2900 block of Rose Avenue causing substantial damage.
A 150-foot redwood tree was toppled by high winds. It fell onto a home and damaged a car. The tree was planted in 1927.
Mount Diablo RAWS reported a peak gust of 58 mph at 1217 a.m. PDT while Los Vaqueros reported a peak gust of 60 mph at 9:45 p.m. PDT.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in California in 2009Every state in 2009This day in weather historyWarnings in California, October 2009
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 200631, 200634, 200635.