National Weather ServiceWashingtonFlood AdvisoryArchive to October 1, 2026
Flood Advisories in Washington
The National Weather Service issued 36 flood advisories for Washington in 2025 and 52 a year on average in 2008-2025; in 2021-2025 it had the 37th most of any state. 2026 through September: 18, 58% below the average of 43 for those months in 2008-2025. Okanogan was covered most often (161 times since 2008).
How many flood advisories does Washington get?
Every flood advisory that covered part of Washington. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 18 |
| 2025 | 36 |
| 2024 | 16 |
| 2023 | 100 |
| 2022 | 93 |
| 2021 | 37 |
| 2020 | 25 |
| 2019 | 102 |
| 2018 | 28 |
| 2017 | 36 |
| 2016 | 57 |
| 2015 | 66 |
| 2014 | 63 |
| 2013 | 34 |
| 2012 | 64 |
| 2011 | 44 |
| 2010 | 50 |
| 2009 | 55 |
| 2008 | 27 |
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 Washington 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 Washington?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| Okanogan | 161 | 33 | September 3, 2026 |
| Stevens | 115 | 24 | June 30, 2026 |
| Ferry | 111 | 18 | June 26, 2026 |
| Chelan | 102 | 19 | August 14, 2026 |
| Spokane | 97 | 17 | May 29, 2026 |
| Pend Oreille | 87 | 16 | August 16, 2026 |
| Clark | 83 | 8 | December 18, 2025 |
| Mason | 72 | 9 | December 15, 2025 |
| Whitman | 66 | 8 | May 29, 2026 |
| King | 64 | 9 | December 11, 2025 |
| Snohomish | 63 | 11 | December 11, 2025 |
| Cowlitz | 61 | 5 | December 9, 2025 |
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 Washington.