Columbia River at Rock Island Dam (outflow), WA

CHELAN COUNTY, WA47.3398°N, -120.0945°W Updated 1 hr ago

FLOW RATE

65,500cfs

Flow Rate Historical Avg

MEDIAN FLOW RATE · 1 DAY

65,500cfs

Optimal band: 40,035–54,165 cfs

PERIOD HIGH

105,100cfs

PERIOD LOW

10,400cfs

RUNNABLE

13%

last 1 day in band

Weather Map

Loading weather map…

Your History · Columbia River at Rock Island Dam (outflow), WA

Track your history

Sign in to track your sessions at Columbia River at Rock Island Dam (outflow), WA: best days, monthly trends, and time on the water.

47.3398, -120.0945

Loading map…

DATA · USACE · NOAA · NWSUPDATED 2026-09-23 15:00 UTC

Site #nwdp:RIS.Flow-Out.Ave.1Hour.1Hour.CBT-REV·USACE

Create a free account to save favorites, set flow alerts, and track conditions