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San Mateo County, California
Tornadoes, hail, floods and severe storms recorded here between 1958 and 2026, from NOAA's Storm Events Database. Search an address to see which tornadoes came closest to it.
4
Tornado reports
9
Hail reports
98
Floods since 1996
179
All events
10
Deaths
$16.3M
Property damage
Tornado paths in San Mateo County
The part of each tornado’s path NOAA recorded in this county, 4 in all. Zoom in and the paths widen to their surveyed width.
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Year by year
All storm eventsTornadoes
NOAA's storm database records tornadoes back to 1950 and hail and thunderstorm wind back to 1955, but floods only from 1996 on. Older floods are missing here. For those, the U.S. Geological Survey's stream gauge records and flood reports are the place to look.
Most significant events
The strongest tornadoes, deadliest events and biggest damage here, up to 50.
At 7:47 a.m. PDT the California Highway Patrol responded to a three car collision on Highway 1 at Devil's Slide. Heavy rain and strong winds were a contributing factor of the crash. A 74-year-old woman lost her life in the accident.
Swimmer was overcome by heavy surf and drowned.
heavy rain contributed to auto accident
rain slick roads caused several auto accidents
The roof of a Home Depot collapsed due to the accumulation of heavy rain flooding the interior of the stor with 6 inches of rain and exposing the interior to continuing rain.
Flood Flood
One lane of northbound Interstate 280 was flooded at Trousdale Drive.
Flash Flood Flash Flood
The gauge along Belmont Creek at the Harbor Boulevard and Old County Road intersection reported major flooding, up to a stage of 5.26 feet.
Thunderstorm Wind Thunderstorm Wind
An Ambient Weather station reported a gust of 60.6 mph.
Thunderstorm Wind Thunderstorm Wind
San Francisco International Airport reported a peak wind gust of 73 mph at 2:56 AM. Wind gusts above 58 mph were noted between 2:40 and 2:59 AM.
Thunderstorm Wind Thunderstorm Wind
Broadcast media reported that a tree fell in the El Granada area, which led to additional power lines and trees coming down. 4 vehicles were damaged. Additionally, a tree fell on an apartment complex causing exterior damage. Location estimated. Time estimated based on radar and s…
Flood Flood
Vehicles were stuck in floodwaters on the onramp from Hickey Boulevard to southbound Interstate 280.
Flood Flood
Flooding was reported in the slow lane of northbound Interstate 280 south of Hayne Road.
Thunderstorm Wind Thunderstorm Wind
The PG&E station on North Peak Access Road reported a gust of 67 mph.
Thunderstorm Wind Thunderstorm Wind
Half Moon Bay Airport reported a gust of 62 mph before the station lost power and stopped reporting.
Flood Flood
Several inches of water were reported on southbound Interstate 280 at Woodside Road.
Flash Flood Flash Flood
The gauge along Belmont Creek at the Harbor Boulevard and Old County Road intersection reported major flooding, up to a stage of 5.64 feet.
Flood Flood
Roadway flooding was reported on northbound Interstate 280 at John Daly Boulevard.
Flood Flood
Roadway flooding was reported on the offramp from northbound US Highway 101 to the Candlestick Point area.
Flood Flood
Flooding was reported in the number 1, 2, and 3 lanes of southbound US Highway 101 at Holly Street, and in the number 1 and 2 lanes of northbound US Highway 101 between California Highway 92 and Ralston Street.
Flood Flood
Flooding was reported on southbound US Highway 101 north of Millbrae.
Flood Flood
Roadway flooding was reported at the offramp from southbound Interstate 280 at Eastmoore Boulevard. The offramp was completely flooded with 12 inches of water on the road.
Flood Flood
The northbound and southbound lanes of California Highway 1 at Ponitas Bridge were flooded.
Flood Flood
Three to six inches of water covered Interstate 280 near Sneath Lane.
Thunderstorm Wind Thunderstorm Wind
A strong thunderstorm cell touched down just south of Ano Nuevo State Park at 4:23 PM. Video from a farm near the location showed damage to structures, sparking speculation of a possible tornado. Subsequently, an NWS team conducted a storm survey at the site. The team identified …
Flood Flood
Four feet of standing water was reported on the offramp from southbound Interstate 280 to Westborough Boulevard.
Flood Flood
All lanes of northbound Interstate 280 right before the San Bruno Avenue offramp were flooded.
Thunderstorm Wind Thunderstorm Wind
A 83 mph gust was recorded at the San Francisco International Airport at 6:02 AM Saturday.
Thunderstorm Wind Thunderstorm Wind
A CWOP site in Pacifica (AE6DC-5) reported a 97 mph gust at 6:20 AM Saturday.
Flood Flood
Northbound US Highway 101 was flooded at the Willow Road offramp.
Flood Flood
All three lanes of northbound State Highway 35 flooded south of the connector to State Highway 1.
Heavy Rain Heavy Rain
San Francisco International Airport recorded a new daily record rainfall of 2.55 inches for November 22.
Hail Hail
Approximate location. Pea-sized hail was reported on by various parties on social media.
Flood Flood
Flooding on the offramp from northbound Interstate 280 to Bunker Hill Road.
Flood Flood
A van went off the roadway near a large amount of flooding in lanes 3 and 4 of Interstate 280 at the Bunker Hill onramp.
Flood Flood
Flooding was reported near the southbound Interstate 280/Westborough Boulevard offramp.
Thunderstorm Wind Thunderstorm Wind
Three inch tree limbs were broken, and power lines were downed.
Flood Flood
Street flooding was reported on California Highway 92 in Spanishtown near Half Moon Bay. One way traffic controls were in effect as firefighters dealt with the flooding.
Thunderstorm Wind Thunderstorm Wind
The ASOS weather station at the San Francisco International Airport reported a gust of 60 mph.
Thunderstorm Wind Thunderstorm Wind
A roof was blown off an apartment building in South San Francisco.
Debris Flow Debris Flow
A mud slide blocked the entire westbound lane of California Highway 92 west of Pilarcitos Creek Road near Half Moon Bay.
Heavy Rain Heavy Rain
Redwood City with 4.47. 12/31/2022 was the 3rd wettest in a record that goes back to 1906. The daily rainfall made up 42.8% of December 2022's rainfall. The wettest day on record at Redwood City was back on 10/13/1962 with 4.88 inches.
Flood Flood
CHP reported flash flooding of US Highway 101 at Oyster Point Road in South San Francisco at 5:58 AM. By 10:58 AM, the entire roadway had flooded and the highway was closed. The flooding caused traffic backups and diversions with Interstate 280 as the alternate. The northbound la…
Flood Flood
Heavy rain caused flooding on US101 at S Airport Blvd.
Flood Flood
Roadway flooding caused hard closure of SR 92 between SR 35 AND SR1.
Flood Flood
Roadway flooding near I-280 N and Serramonte Blvd.
Thunderstorm Wind Thunderstorm Wind
Mesonet station on Lake Drive reported.
Events by year, as a table
| Year | Events | Tornadoes |
|---|---|---|
| 2026 | 2 | 0 |
| 2025 | 19 | 0 |
| 2024 | 10 | 0 |
| 2023 | 4 | 0 |
| 2022 | 2 | 0 |
| 2021 | 3 | 0 |
| 2020 | 9 | 0 |
| 2019 | 14 | 0 |
| 2018 | 12 | 0 |
| 2017 | 27 | 0 |
| 2016 | 1 | 0 |
| 2015 | 3 | 0 |
| 2014 | 6 | 0 |
| 2012 | 7 | 0 |
| 2010 | 6 | 0 |
| 2009 | 3 | 0 |
| 2008 | 1 | 0 |
| 2006 | 1 | 0 |
| 2005 | 3 | 1 |
| 2004 | 6 | 0 |
| 2002 | 3 | 0 |
| 2001 | 3 | 0 |
| 2000 | 4 | 0 |
| 1999 | 1 | 0 |
| 1998 | 10 | 1 |
| 1997 | 13 | 0 |
| 1996 | 2 | 0 |
| 1986 | 1 | 1 |
| 1982 | 1 | 0 |
| 1980 | 1 | 0 |
| 1958 | 1 | 1 |
Search your address
See every tornado that passed within 25 miles of a place in San Mateo County, measured to its path.
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