National Weather ServiceCaliforniaFlood AdvisoryArchive to October 1, 2026
Flood Advisories in California
The National Weather Service issued 655 flood advisories for California in 2025 and 296 a year on average in 2008-2025; in 2021-2025 it had the 7th most of any state. 2026 through September: 254, 16% above the average of 219 for those months in 2008-2025. San Bernardino was covered most often (851 times since 2008).
How many flood advisories does California get?
Every flood advisory that covered part of California. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 254 |
| 2025 | 655 |
| 2024 | 489 |
| 2023 | 594 |
| 2022 | 394 |
| 2021 | 242 |
| 2020 | 138 |
| 2019 | 353 |
| 2018 | 270 |
| 2017 | 369 |
| 2016 | 302 |
| 2015 | 208 |
| 2014 | 272 |
| 2013 | 163 |
| 2012 | 260 |
| 2011 | 179 |
| 2010 | 239 |
| 2009 | 96 |
| 2008 | 109 |
Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 1, 2026.
When in the year does California get them?
Sum of 2008-2025; the busiest month is labelled.
Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 1, 2026.
Where in California?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| San Bernardino | 851 | 259 | September 29, 2026 |
| Riverside | 622 | 205 | September 29, 2026 |
| Los Angeles | 439 | 171 | September 29, 2026 |
| San Diego | 355 | 170 | September 24, 2026 |
| Fresno | 341 | 134 | August 13, 2026 |
| Kern | 321 | 109 | September 8, 2026 |
| Ventura | 309 | 131 | September 9, 2026 |
| Santa Barbara | 300 | 107 | September 8, 2026 |
| Tulare | 239 | 85 | January 4, 2026 |
| Santa Clara | 236 | 103 | February 17, 2026 |
| Madera | 226 | 81 | July 21, 2026 |
| San Luis Obispo | 217 | 73 | September 8, 2026 |
The NWS issues these products for counties or forecast zones; a zone can be part of a county or a mountain range.
Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 1, 2026.
What is a flood advisory?
A flood advisory covers flooding that is less serious than a warning, such as water on roads or in low-lying areas, that is still a hazard to drivers and walkers. An advisory is issued for a hazard less serious than a warning that can still cause inconvenience or danger if people are not careful. The national record · Every warning type in California.