FloodZoneMap.org

Flash Flood — Chelan, WA

Jul 2, 2019

During the afternoon of July 2nd numerous slow moving thunderstorms containing heavy rain formed near the center of an upper level low pressure over the western Columbia Basin and the east slopes of the Cascade Mountains. A rich moisture feed wrapping around this upper low pressure allowed some of these storms to produce heavy rainfall over limited areas. A spotter near Waterville reported 1.29 inches of rain from a series of thunderstorms training through the area. Several reports of flash floo

Source: NOAA National Weather Service Storm Events Database (event 834016). Narrative written by NWS staff at the time of the event.

Flood Risk Context for Chelan, WA

This event is one of many recorded floods in Chelan County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.

View Chelan County flood data →

More Flood Stories

Flood$200K damage

Chelan, WA · Dec 10, 2025

An atmospheric river brought heavy rains to the Cascades December 8 through 10. The East slopes saw 48 hour rain amounts of up to 7 inches along the crest, 3 to 4 inches in the mid slopes, and at least half an inch in the low land areas.

Read the full account →
Flood$200K damage

Chelan, WA · Dec 10, 2025

An atmospheric river brought heavy rains to the Cascades December 8 through 10. The East slopes saw 48 hour rain amounts of up to 7 inches along the crest, 3 to 4 inches in the mid slopes, and at least half an inch in the low land areas.

Read the full account →
Flood$100K damage

Chelan, WA · Dec 8, 2025

An atmospheric river brought heavy rains to the Cascades December 8 through 10. The East slopes saw 48 hour rain amounts of up to 7 inches along the crest, 3 to 4 inches in the mid slopes, and at least half an inch in the low land areas.

Read the full account →
Flash Flood$50K damage

Chelan, WA · Aug 10, 2019

The weather pattern on August 10th featured a very moist and unstable air mass with a passing upper level low pressure. These elements promoted widespread thunderstorms with heavy rain which produced Flash Flooding over potions of eastern Washington.

Read the full account →