Santa Clara County weather alerts
There are no active weather alerts for Santa Clara County, CA right now.
Since 2016 the National Weather Service has issued about 554 alerts that included Santa Clara County, roughly 55 a year. The most common is the flood advisory (172 from 2016 to 2025). No tornado warnings were recorded here in that period. 6 tornadoes have touched down in the county since 1950.
Updated from the National Weather Service · lists refresh hourly; the live map loads current alerts directly from the NWS
No warnings, watches or advisories include Santa Clara County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring San Benito County, Stanislaus County, Merced County, San Mateo County.
Santa Clara County alert history
Alert events that included Santa Clara County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Flood Advisory | 172 | 9 | November 13, 2026 |
| Wind Advisory | 68 | 2 | May 18, 2026 |
| Frost Advisory | 48 | 0 | March 7, 2025 |
| Heat Advisory | 48 | 9 | October 3, 2026 |
| Flood Warning | 39 | 0 | February 13, 2025 |
| Freeze Warning | 31 | 0 | February 10, 2025 |
| Flood Watch | 26 | 0 | December 21, 2025 |
| Flash Flood Warning | 20 | 0 | December 25, 2025 |
| Dense Fog Advisory | 20 | 0 | December 15, 2025 |
| Severe Thunderstorm Warning | 16 | 0 | December 26, 2025 |
| High Wind Watch | 12 | 0 | December 24, 2025 |
| Extreme Heat Watch | 10 | 0 | July 2, 2024 |
| Extreme Heat Warning | 9 | 0 | September 30, 2024 |
| Freeze Watch | 9 | 0 | January 30, 2025 |
| Red Flag Warning | 7 | 0 | November 5, 2024 |
| High Wind Warning | 6 | 0 | December 24, 2025 |
| Fire Weather Watch | 4 | 0 | October 17, 2024 |
| Winter Weather Advisory | 4 | 1 | February 17, 2026 |
| Winter Storm Watch | 2 | 0 | February 23, 2023 |
| Cold Weather Advisory | 2 | 6 | February 21, 2026 |
| Winter Storm Warning | 1 | 0 | February 24, 2023 |
| Extreme Cold Watch | 0 | 1 | January 9, 2026 |
| Extreme Cold Warning | 0 | 4 | February 21, 2026 |
Tornado history in Santa Clara County
6 tornadoes have been recorded in Santa Clara County since 1950, injuring 2 people. That ranks 23 of 58 counties in California. The most recent was on April 14, 2007 (rated EF0).
Strongest tornadoes in Santa Clara County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| January 11, 1951 | F2 | Santa Clara County | 5.7 mi | 10 yd | 0 | 0 |
| May 5, 1998 | F2 | Santa Clara County | 0.6 mi | 100 yd | 0 | 1 |
| May 5, 1998 | F1 | Santa Clara County | 0.3 mi | 80 yd | 0 | 1 |
| December 8, 1997 | F0 | Santa Clara County | 0.2 mi | 100 yd | 0 | 0 |
| April 14, 2007 | EF0 | Santa Clara County | 0.2 mi | 30 yd | 0 | 0 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| April 14, 2007 | EF0 | Santa Clara County | 0.2 mi | 30 yd | 0 | 0 |
| May 5, 1998 | F2 | Santa Clara County | 0.6 mi | 100 yd | 0 | 1 |
| May 5, 1998 | F1 | Santa Clara County | 0.3 mi | 80 yd | 0 | 1 |
| February 6, 1998 | F0 | Santa Clara County | 0.1 mi | 30 yd | 0 | 0 |
| December 8, 1997 | F0 | Santa Clara County | 0.2 mi | 100 yd | 0 | 0 |
About Santa Clara County
- Population: 1,926,325 (2024 estimate)
- State: California
- NOAA Weather Radio SAME code: 006085 (how to use it)
- Cities: San Jose, Sunnyvale, Santa Clara