States › Washington › Clark County › Flood
Flood in Clark County, Washington
12 floods and flash floods events in the NCEI Storm Events record, 1950 to 2026. Event types counted: Flood, Flash Flood, Coastal Flood, Lakeshore Flood.
NCEI notes that Storm Data is compiled from a variety of sources including the National Weather Service, other federal, state and local agencies, the media and the public; that property and crop damage figures are estimates; and that some events are recorded by NWS forecast zone rather than by county. FEMA notes that NFIP claim records are redacted and aggregated to protect the privacy of policyholders. Storm records through 30 Jun 2026.
NCEI records 12 flood events in Clark County, Washington, between 1950 and 2026, spread over 6 years.
November is the busiest month, with 3 of the recorded events. The last 20 years account for 12 events against 0 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 1.4% of the 832 flood events recorded in Washington; its 1.9 per 100 square miles compares with 1.3 statewide.
Compared with Washington
| Measure | Clark County | Washington | US |
|---|---|---|---|
| Flood events since 1950 | 12 | 832 | 183,559 |
| Per 100 square miles | 1.9 | 1.3 | 5.2 |
| Per 10,000 residents | 0.2 | 1.1 | 5.5 |
| Deaths recorded | 0 | 12 | 2,961 |
| Busiest month | November | January | June |
By year
Seasonality
2Feb
0Mar
1Apr
1May
2Jun
1Jul
0Aug
0Sep
1Oct
1Nov
3Dec
0
Recorded events
All 12 events, most recent first. Magnitude is hail size, tornado rating or wind speed as recorded.
| Date | Event type | Magnitude | Property damage | Crop damage | Deaths | Injuries | Geography |
|---|---|---|---|---|---|---|---|
| 4 Nov 2022 | Flood | — | — | — | — | — | County |
| 4 Nov 2022 | Flood | — | — | — | — | — | County |
| 4 Nov 2022 | Flood | — | — | — | — | — | County |
| 17 May 2018 | Flood | — | — | — | — | — | County |
| 22 Oct 2017 | Flood | — | — | — | — | — | County |
| 1 Apr 2017 | Flood | — | — | — | — | — | County |
| 16 Mar 2017 | Flood | — | — | — | — | — | County |
| 29 Sep 2013 | Flood | — | — | — | — | — | County |
| 1 Jun 2011 | Flood | — | $1.2M | — | — | — | County |
| 26 May 2011 | Flood | — | $300K | — | — | — | County |
| 8 Jan 2009 | Flood | — | — | — | — | — | County |
| 8 Jan 2009 | Flood | — | — | — | — | — | County |
Questions and answers
How many flood events has Clark County had?
12 events in the NCEI Storm Events record between 1950 and 2026. Reporting of floods and flash floods became far more complete after 1996, so early decades undercount.
When was the last recorded flood event in Clark County?
4 Nov 2022 (Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in Clark County?
The flood of 1 Jun 2011, with property damage estimated by NCEI at $1.2M.
How does Clark County compare with Washington for flood?
1.9 events per 100 square miles against 1.3 statewide; the county holds 12 of the state's 832 recorded events.
Provenance
NOAA NCEI Storm Events Database, yearly details files through 30 Jun 2026, public domain. County-recorded events plus zone-recorded events whose forecast zone is named for the county (marked "Forecast zone"). Population and area from the US Census Bureau (2021). Built 1 Oct 2026. See the methodology, the Flood hub and the county page.