Yakima River at Umtanum, WA

Eastern Washington · USGS gauge 12484500 · Updated Oct 24, 3:19 AM PDT · USGS data, provisional

Fishable/Floatable656 cfs● steady (-4% in 24 h)

Reading time: Oct 24, 2:15 AM PDT · Provisional data

Flow is in a typical range for the date. Rivers are generally easiest to fish and float when they are near their normal flow, but this status says nothing about water clarity, hatches, hazards such as wood in the river, or dam releases.

Vs. normal for this date
31st percentile
Typical range (25th–75th)
608–1,110 cfs
Median for this date
856 cfs
7-day low / high
656 / 852 cfs

Plain-language explanation

Yakima River at Umtanum is flowing at 656 cubic feet per second (cfs) as of Oct 24, 2:15 AM PDT. That is in the normal range for this time of year: lower than about 69% of the daily flows this gauge has recorded for this date (give or take 7 days) over 118 years of record (1908–2026).

The middle half of those historical flows runs from 608 to 1,110 cfs, with a median of 856 cfs; the lowest 10% of days are at or below 455 cfs and the highest 10% at or above 1,530 cfs.

Over the last 24 hours the flow has been steady (-3.8%). In the last 7 days it ranged from 656 to 852 cfs.

Regulated flow: upstream dams or diversions influence this gauge, so the “normal range” above reflects managed flows and can differ from natural river behavior.

Why this status: Flow is within the range this gauge normally sees at this time of year (or the deviation is too small in absolute terms to matter).

7-day trend

typical range for this date (25th-75th pct)632683734786837Sun 10/18Mon 10/19Tue 10/20Wed 10/21Thu 10/22Fri 10/23Sat 10/24

Hourly flow in cfs, Pacific time. The shaded band is the typical range (25th–75th percentile) for this date, shown when it falls within the chart.

Day (Pacific)Mean cfsPercentileStatus that day
Sun Oct 1872631stFishable/Floatable
Mon Oct 1972032ndFishable/Floatable
Tue Oct 2074636thFishable/Floatable
Wed Oct 2171434thFishable/Floatable
Thu Oct 2269033rdFishable/Floatable
Fri Oct 2366732ndFishable/Floatable
Sat Oct 24 (so far)66332ndFishable/Floatable

Seasonal context

1002005001,0002,0005,00010,000JanFebMarAprMayJunJulAugSepOctNovDec

Shaded band: 10th–90th percentile of daily flows through the year; dashed line: median. Log scale. Dot: today's flow. Based on 118 years of USGS daily data (1908–2026).

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About this gauge

USGS site
USGS-12484500
USGS name
Yakima River At Umtanum, Wa
Drainage area
1,594 sq mi
Location
46.8626, -120.4801
Record in this analysis
1908–2026

Typical uses

fly fishingfloat

Notes: Managed by reservoir releases and irrigation diversions, so seasonal flow patterns differ from natural ones. (Hand-written general note, not from USGS data.)

Data from the U.S. Geological Survey (USGS). Readings are provisional and subject to revision. Flowcast statuses are automated comparisons with each gauge's own history, not safety ratings or fishing reports. Check local conditions, weather, regulations and closures before you go. Rivers can change quickly.

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