Reservoir Report

Lake Tapps Near Sumner reservoir

Washington, USA USGS
Today high
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Tonight low
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Current storage
542ft
% of normal
0%
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Right now · current storage
Lake Tapps Near Sumner
USGS · 12101000
542 ft
As of 2026-05-14
Seasonal avg
541
Record max
543
24h change
--
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Lake Tapps Near Sumner -- None reservoir
Lake Tapps Near Sumner None
About this reservoir

Lake Tapps Near Sumner

Lake Tapps is a reservoir located near Sumner, Washington. Originally, it was created as a hydroelectric project in 1911, but eventually became a popular recreational destination as well. The lake is fed by the White River and is owned by the Cascade Water Alliance. The hydrology of the lake is managed by the alliance, and the water level is raised and lowered throughout the year to meet the needs of downstream water users. Surface flow and snowpack providers for the lake include the White River and the surrounding mountains. Lake Tapps is used for a variety of recreational activities, including boating, fishing, and swimming. The lake also serves as a source of irrigation for local agricultural businesses.

StateNone
OperatorUSGS
Site ID12101000
Percent of normal0%
Last updated2026-05-14
Records since2007
Storage trends

Daily levels at Lake Tapps Near Sumner

Storage volume, pool elevation, and total release plotted from the operating agency's daily observations.

Reservoir storage, acre-ft

ac-ft · code 00054

Gage height, ft

ft · code 00065

Lake or reservoir water surface elevation above NGVD 1929, ft

ft · code 62614

Detailed forecast

Plan around the weather

Same NOAA / yr.no feed Snoflo's iOS app uses. Watch the precipitation column on the meteogram -- rain on the basin upstream typically lifts inflow 24-72 hours later.

Hourly detail

Next 5 days, hour by hour

Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.

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Deep dive

5-day forecast table

Every 3 hours, broken out across temperature, snow, rain, humidity, and wind. Each cell is colour-coded relative to the column min/max.

TimeConditionTemp (°F)Snow (in)Rain (in)Humidity (%)Wind (mps)Wind dir
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Long-term outlook

15-day temperature & precipitation

Daily temperatures, snow, and rain projected over the next two weeks.

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Regional inflow

Nearby streamflow gauges

USGS streamgauges around Lake Tapps Near Sumner -- inflows here typically show up in storage 24-72 hours later.

Track Lake Tapps Near Sumner in the Snoflo app

Save this reservoir as a favorite and set push alerts when storage crosses a threshold (e.g. "alert me at 80% of normal").

FAQ

About Lake Tapps Near Sumner

Where does the data for Lake Tapps Near Sumner come from?

Daily storage, pool elevation, and release rates are sourced from USGS, USBR, and USACE monitoring stations. Weather forecast comes from NOAA / yr.no -- the same feed Snoflo's iOS app uses.

How often is the report updated?

Storage observations are updated daily by the operating agency. The 15-day weather forecast refreshes throughout the day. Snoflo caches and renders the most recent observation -- check the "as of" timestamp on the storage card.

What does the Hazard hazard rating mean?

The Corps of Engineers' hazard potential classification grades probable consequences if the dam fails: High = probable loss of human life; Significant = no probable loss of human life but possible economic loss / environmental damage; Low = no probable loss of human life, only minor economic / environmental losses. See the Dam Data Reference card above for the full definitions.

What's "% of normal"?

The current storage value compared to the historical average storage on this calendar day. 100% = right on average; values above 100% mean above-normal storage (wet year); values below mean below-normal (dry year or drought).

Can I get alerts when storage crosses a threshold?

Yes -- alerts are managed in the Snoflo iOS app. Favorite this reservoir, set a threshold, and you'll get a push the moment conditions cross.

Premium feature

Favorites and alerts are part of Snoflo Premium. Save reservoirs, set storage thresholds, and get push notifications when conditions cross.

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Manage alerts in the Snoflo app

Custom alerts are configured in the iOS app -- favorite this reservoir, set a threshold, and you'll get a push the moment conditions cross.

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