48
Recorded events
0
Direct deaths
0
Direct injuries
$2.3M
Property damage
Flash Flood in Chelan County, Washington: 48 recorded events between 1997 and 2024. The strongest on record measured 0. That places the county #639 nationally and #1 statewide for this hazard.
Decade by decade
Flash Flood in Chelan County, Washington: events per decade
Reporting practice changed over time — early decades are undercounted, not calmer.
The busiest decade for flash flood in Chelan County is the 2010s, when 22 of the county's 48 recorded events were logged. Comparing decades is useful for spotting active periods, but the earliest years are thin because systematic reporting for this hazard began later.
Within the Chelan County archive, flash flood makes up 28.4% of all recorded severe weather across 11 hazard types. Nationally the county sits at #639 for this hazard and #1 within Washington, putting it in the 78.8 percentile of all U.S. counties.
Seasonality
Events by month
Jun is the peak month for flash flood in Chelan County with 21 recorded events, while Jan is the quietest. Seasonality here is a property of the archive as much as the climate: reports cluster where population and spotter networks are densest.
Most recent
Latest recorded events
| Date | Location | Magnitude | Damage |
|---|---|---|---|
| Aug 24, 2024 | WEST WENATCHEE | 0 | $500 |
| Jun 27, 2023 | TELMA | 0 | $1K |
| May 20, 2023 | BERNE | 0 | $500 |
| Jul 4, 2022 | CHELAN | 0 | $1K |
| Jul 3, 2022 | LAKESIDE | 0 | $8K |
| Jul 3, 2022 | MALAGA | 0 | $5K |
| Jun 5, 2022 | WEST WENATCHEE | 0 | $80K |
| Jun 5, 2022 | WEST WENATCHEE | 0 | $10K |
| Jun 5, 2022 | OLDS | 0 | $100K |
| Jun 5, 2022 | WEST WENATCHEE | 0 | $10K |
From the record
What the reports say
Written by National Weather Service staff at the time of the event · public domain
A flash flood down the Colockum Creek drainage washed out Tarpiscan Road at the Colockum Creek bridge. Colockum Road, Kingsbury Road, and Agnew Road were closed due to the damage. Multiple homes were damaged along the Colockum Creek Drainage as well by rocks, trees and other debris that traveled with the flood wave. Damage costs were estimated.
Flash flooding and debris traveled down Imus Creek near Stehekin and covered approximately 350 linear feet of Stehekin Valley Road. Mud and debris covered the road up to eight feet deep in spots. Several vehicles and bicycles in a parking area were damaged and/or pushed into Stehekin Lake. An office and residential building were surrounded by mud and debris, but only received minimal interior flood damage. Damage costs were estimated.
An ice jam on Mission Creek in addition to rapid snow melt caused flooding from Cashmere to Entiat. Several basements of homes and structures were flooded, included a few downtown businesses in Cashmere. Portions of Highway 28 were closed. Douglas Creek also caused some minor flooding.
Quick answers
Frequently asked
How many flash flood events are on record in Chelan County, Washington?
48 flash flood events are recorded in Chelan County between 1997 and 2024, causing 0 direct deaths.
What is the strongest flash flood recorded in Chelan County?
The strongest flash flood on record in Chelan County measured 0.
Where does the flash flood data for Chelan County come from?
All events come from the NOAA/NCEI Storm Events Database, the federal public-domain archive of severe weather reports. Dates are UTC, damage is as reported and not inflation-adjusted, and the most recent entries may still be revised.
Cite this page
“Flash Flood in Chelan County, Washington.” Severe Weather History. severeweatherhistory.com/county/washington/chelan-county/flash-flood/ · Data: NOAA/NCEI, FEMA, U.S. Census — public domain.