Mercer Creek Near Bellevue flow report
As of July 12, 2026, Mercer Creek Near Bellevue is flowing at 12 cfs, receding 10% over the past 24 hours. Source: USGS gauge #12120000, refreshed throughout the day.
Historical Data
Mercer Creek Near Bellevue at a glance
How Mercer Creek Near Bellevue is running right now, where it sits on the map, and the key gauge stats.
Mercer Creek Near Bellevue is flowing at 12 cfs, with the water sitting 1.10 ft at the gage. Flow is down 10% since yesterday as the gauge recedes.
This is USGS gauge #12120000 in Washington. Over the past 10 days the average has been 44 cfs, peaking at 132 cfs.
For real-time updates and historical context, see the realtime view or the historical comparison. Browse other gauges in the Washington flow report.
How does this compare to past years?
Year-over-year overlay, annual peak discharge, the full distribution of daily flows on record, and the gauge's rating curve.
Weather Forecast
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
5-day forecast table
Every 3 hours, broken out across temperature, snow, rain, humidity, and wind.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day forecast
Daily temperatures, snow, and rain projected over the next two weeks.
Mercer Creek Near Bellevue
The creek is fed by several small tributaries and is impacted by nearby dams, which can affect its flow. Seasonal trends show that flow rates are highest during the winter and spring months when snowmelt and rain are common. Interesting facts about the hydrology of Mercer Creek include its proximity to Bellevue's urban center and the presence of a small waterfall near the stream gauge. Overall, the Mercer Creek Stream Gauge is an important tool for monitoring the health and flow of this important waterway.
Nearby streamflow levels
Cross-check Mercer Creek Near Bellevue's discharge against nearby gauges to spot whether the change here is local or regional.
| Gauge | Streamflow |
|---|---|
| Mercer Creek Near Bellevue | 12 cfs |
| Issaquah Creek Near Mouth Near Issaquah | 27 cfs |
| Thornton Creek Near Seattle | 41 cfs |
| Cedar River At Renton | 197 cfs |
| Duwamish River At Golf Course At Tukwila | 121 cfs |
| Mill Creek Near Mouth At Orillia | 1 cfs |
Nearby snowpack data
Snowpack at SNOTEL stations near Mercer Creek Near Bellevue. Spring snowmelt is the dominant driver of streamflow in mountain basins -- a deep snowpack upstream means more runoff later in the season.
| SNOTEL station | Snowpack |
|---|---|
| Kent | 0 in |
| Nohrsc Alpine Meadows | 1 in |
| Alpine Meadows | 1 in |
| Skookum Creek | 0 in |
| Skookum Creek | 0 in |
| Cougar Mountain | 0 in |
Plan a trip
Reservoirs, boat launches, river runs, and fishing spots within driving distance of Mercer Creek Near Bellevue.
Nearby reservoirs
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Boat launches
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River runs
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Nearby fishing
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River levels & flood safety
- Read the level before you go
- A river that's runnable at one flow can be deadly at another. Check current discharge and gage height — like the values shown above — against the flood-stage thresholds, and remember levels can spike fast after rain or a dam release.
- Respect cold water
- Snowmelt rivers run cold even in summer. Sudden immersion triggers cold-water shock and saps strength within minutes. Wear a PFD, dress for the water temperature (not the air), and never wade or paddle alone.
- Watch for swiftwater hazards
- Strainers (downed trees), undercut rocks, and low-head dams are the deadliest features on moving water. High, fast, muddy water hides them. If in doubt, scout from shore and portage.
- Mind flash floods & releases
- Narrow canyons can flood from a storm miles upstream, and dam-controlled reaches can rise without warning. Know the forecast, the release schedule, and your exit before you launch.
Track Mercer Creek Near Bellevue in the Snoflo app
Save this gauge as a favorite, set push alerts when streamflow crosses a threshold (e.g. "alert me when Mercer Creek Near Bellevue crosses 5,000 cfs"), and Snoflo's iOS app will push the moment USGS reports the crossing.
About Mercer Creek Near Bellevue
Where does the streamflow data for Mercer Creek Near Bellevue come from?
Discharge, gage height, and water temperature come directly from the USGS streamflow gauge 12120000. Snoflo refreshes the time series throughout the day. Forecasts come from the NOAA / yr.no feed Snoflo's iOS app uses.
How often is the report updated?
USGS gauges report continuously (typically every 15 minutes). Snoflo pulls fresh values throughout the day — look for the "as of" timestamp on the streamflow hero card.
What's the difference between discharge and gage height?
Discharge (cubic feet per second, or cfs) is the volume of water flowing past the gauge each second. Gage height is how high the water sits at the gauge (feet). They're related by a rating curve specific to each gauge — higher water means more flow, but the exact ratio depends on channel shape.
How is "percent of median" calculated?
Today's discharge is compared to the historical median discharge on this calendar day across the gauge's full record. 100% = right on median; 200% = a very high year; 30% = a drought-level low.
What are flood stages, and is this river safe right now?
Flood stages are NWS-defined gage-height thresholds — Action, Minor, Moderate, Major — marking when nearby roads or floodplains start to be affected. "Safe" depends on your activity and skill: a level that's a fun paddle for an expert can be lethal for a wader. Always check the current level against the thresholds above and the safety links, and when in doubt, stay off the water.
Can I get alerts when Mercer Creek Near Bellevue rises?
Yes — flow alerts are managed in the Snoflo iOS app. Favorite this gauge, set a streamflow threshold (e.g. "alert me when discharge crosses 5,000 cfs"), and you'll get a push the moment USGS reports the crossing.
Access the free Mercer Creek Near Bellevue report
Create your free account to track this river — and everything else you love on the water.
- Flow alerts — get pinged the moment this river hits your range
- Save favorites — every river, lake & snowpack in one place
- Full history & forecasts — plus the free iPhone app