National Weather ServiceWashingtonFlash Flood WarningArchive to October 1, 2026
Flash Flood Warnings in Washington
The National Weather Service issued 4 flash flood warnings for Washington in 2025 and 12 a year on average in 2008-2025; in 2021-2025 it had the 47th most of any state. 2026 through September: 8, 30% below the average of 11 for those months in 2008-2025. Chelan was covered most often (65 times since 2008).
How many flash flood warnings does Washington get?
Every flash flood warning that covered part of Washington. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 8 |
| 2025 | 4 |
| 2024 | 5 |
| 2023 | 22 |
| 2022 | 29 |
| 2021 | 2 |
| 2020 | 2 |
| 2019 | 18 |
| 2018 | 0 |
| 2017 | 3 |
| 2016 | 10 |
| 2015 | 21 |
| 2014 | 25 |
| 2013 | 34 |
| 2012 | 11 |
| 2011 | 2 |
| 2010 | 9 |
| 2009 | 10 |
| 2008 | 4 |
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 |
|---|---|---|---|
| Chelan | 65 | 8 | August 14, 2026 |
| Okanogan | 55 | 14 | September 25, 2026 |
| Yakima | 22 | 3 | May 21, 2023 |
| Ferry | 17 | 3 | August 7, 2025 |
| Douglas | 13 | 1 | May 27, 2023 |
| Stevens | 13 | 3 | June 30, 2026 |
| Kittitas | 10 | 0 | May 22, 2015 |
| Spokane | 9 | 2 | May 29, 2026 |
| Asotin | 8 | 2 | August 27, 2023 |
| Benton | 7 | 0 | June 7, 2019 |
| King | 7 | 3 | December 16, 2025 |
| Pend Oreille | 7 | 1 | June 30, 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.
The latest flash flood warnings for Washington in AreaZine's record
NWS SpokaneWarningSeptember 25, 2026
Flash Flood Warning: Okanogan, WA
Expired 3:30 p.m. PDT, September 25, 2026
NWS SpokaneWarningAugust 14, 2026
Flash Flood Warning: Chelan, WA
Expired 8:00 p.m. PDT, August 14, 2026
NWS SpokaneWarningAugust 13, 2026
Flash Flood Warning: Chelan, WA
Expired 9:45 p.m. PDT, August 13, 2026
NWS SeattleWarningAugust 13, 2026
Flash Flood Warning: Mason, WA
Expired 5:30 p.m. PDT, August 13, 2026
NWS SpokaneWarningAugust 12, 2026
Flash Flood Warning: Okanogan, WA
Expired 6:30 p.m. PDT, August 12, 2026
NWS SpokaneWarningJune 29, 2026
Flash Flood Warning: Pend Oreille and Stevens, WA
Expired 9:45 p.m. PDT, June 29, 2026
NWS SpokaneWarningMay 28, 2026
Flash Flood Warning: Lincoln, WA
Expired 11:30 p.m. PDT, May 28, 2026
NWS SpokaneWarningMay 28, 2026
Flash Flood Warning: Spokane and Whitman, WA
Expired 10:00 p.m. PDT, May 28, 2026
This list is AreaZine's record of the NWS alert feed, kept since April 6, 2026; the counts above come from the complete IEM archive.
Source: National Weather Service alerts (api.weather.gov).
What is a flash flood warning?
A flash flood warning means flash flooding is happening or about to happen: water rising fast in streams, streets or dry washes, usually within six hours of heavy rain or a dam or levee failure. A warning means the hazard is happening, about to happen, or very likely: act now to protect people and property. The national record · Every warning type in Washington.