Yakima River above Ahtanum Creek at Union Gap water level

Name: Yakima River above Ahtanum Creek at Union Gap water level (U.S. Geological Survey)
Creator: U.S. Geological Survey
License: https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits

River gauge, Yakima River, Washington, United States

Directions

Very high for mid-October

Water level

40.22ft Steady over the last 24 hours

Measured Oct 19, 2026, 09:30 PM PDT (1 hour ago)

Flow: 1,340 cfs

History

7 days 30 days 1 year Years compared

20252026

Water level Normal range (10–90 %)

What this means

The Yakima River above Ahtanum Creek at Union Gap is well above normal at 40.22 ft.

That puts it 1.99 ft above the median of 38.23 ft for mid-October, based on 41 years of readings. A year ago it stood at 40.03 ft (+0.19 ft).

The level has held steady over the past 24 hours. In the last month it has stayed between 40.22 ft and 40.72 ft.

That stands out in fall, when many rivers are usually near their lowest.

Compared with 41 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date: 38.23 ft1.99 ft above the median for this date
Normal for this date: 37.68 ft – 39.97 ft8 years in 10 fall in this range (41 years of records)
Same day last year: 40.03 ft+0.19 ft
Lowest and highest in 30 days: 40.22 ft – 40.72 ft
Lowest and highest in 12 months: 39.96 ft – 49.34 ft

Flood levels and safety

Most flood deaths in the US happen in vehicles. Six inches of fast water can knock an adult off their feet, and a foot or two can float a car. If a road is covered, turn around.

Readings can change quickly after heavy rain upstream, so check again before heading near the water.

Weather at the gauge

No rain in the last 3 days.

19 Mon 62° 40° – Wind 5 mph

20 Tue 72° 47° – Wind 10 mph

21 Wed 69° 53° – Wind 7 mph

22 Thu 68° 54° – Wind 8 mph

23 Fri 63° 49° – Wind 13 mph

24 Sat 59° 46° – Wind 5 mph

25 Sun 63° 49° – Wind 3 mph

Forecast: Open-Meteo

Sunrise 07:27 AM Sunset 06:08 PM Daylight 10 hr, 41 min First quarter 65%

Map

Other gauges on the Yakima River

Gauge	Level	Compared with normal	24 hours	Distance
Yakima River at UmtanumRiver gauge, Yakima River	30.80 ft	Normal	+0.08 ft	23 mi
Yakima River at MabtonRiver gauge, Yakima River	12.68 ft	Very high	−0.06 ft	31 mi
Yakima River at KionaRiver gauge, Yakima River	4.20 ft	Low	−0.10 ft	51 mi

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Ahtanum Creek at Union GapRiver gauge, Ahtanum Creek	2.74 ft	Very low	+0.03 ft	0.3 mi
Granger Drain at GrangerRiver gauge, Granger Drain	2.32 ft	Normal	−0.29 ft	19 mi
Toppenish Creek near Fort SimcoeRiver gauge, Toppenish Creek	15.1 cfs	Low	+0.8 cfs	22 mi
Columbia River below Priest Rapids DamRiver gauge, Columbia River	13.01 ft	High	+6.98 ft	29 mi
Rimrock Lake and TietonReservoir	2,849.86 ft	Normal		33 mi
Crab Creek near BeverlyRiver gauge, Crab Creek	3.82 ft	Normal	+0.08 ft	36 mi
Klickitat River above West Fork near GlenwoodRiver gauge, Klickitat River	1.04 ft	Normal	+0.01 ft	41 mi
American River near NileRiver gauge, American River	71.83 ft	Very low	−0.01 ft	45 mi

Questions and answers

How does the Yakima River above Ahtanum Creek at Union Gap compare with last year?

It is 0.19 ft higher than on the same day last year, when the reading was 40.03 ft.

What is a normal level for the Yakima River above Ahtanum Creek at Union Gap in mid-October?

The median for mid-October is 38.23 ft. In 8 years out of 10 the reading falls between 37.68 ft and 39.97 ft, based on 41 years of records.

Is gage height the same as water depth?

No. Gage height is measured from a fixed reference point chosen by the agency, so a reading of 10 ft does not mean the river is 10 ft deep.

What is the water level of Yakima River above Ahtanum Creek at Union Gap today?

On Oct 19, 2026, 09:30 PM PDT, the water level was 40.22 ft. Steady over the last 24 hours.

Is Yakima River above Ahtanum Creek at Union Gap rising or falling?

Steady over the last 24 hours. Down 0.14 ft over the last 7 days.

Is the level of Yakima River above Ahtanum Creek at Union Gap normal?

Very high for mid-October. Compared with 41 years of daily readings for this time of year.

How often is this data updated?

The U.S. Geological Survey publishes a new reading every 15 minutes. This page refreshes within minutes of each update.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: U.S. Geological Survey
Station code: usgs:12500450 (Agency page)
Coordinates: 46.53426, -120.46725 (WGS84)
Vertical datum: NAVD88
Update interval: every 15 minutes
Licence: Public domain. Data: U.S. Geological Survey (USGS), provisional data subject to revision

Published series

Parameter	Last value	Time (UTC)	Quality
Water level	40.22 ft	2026-10-20 04:30	Provisional
Flow	1,340 cfs	2026-10-20 04:30	Provisional

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How to cite

U.S. Geological Survey: Yakima River above Ahtanum Creek at Union Gap (usgs:12500450). Accessed October 20, 2026 via Nivelmap, https://nivelmap.com/en/united-states/washington/yakima-river-above-ahtanum-creek-at-union-gap

How we check values

Each reading is stored as published. We hold back values that jump faster than physically plausible and show the measurement time with every value.

Readings are provisional, can be delayed or wrong and are not a flood warning. Read the disclaimer