Colorado River Below Lake Granby flow report
As of July 15, 2026, Colorado River Below Lake Granby is flowing at 82 cfs with a gage height of 3.86 ft. Source: USGS gauge #09019000, refreshed throughout the day.
Historical Data
Colorado River Below Lake Granby at a glance
How Colorado River Below Lake Granby is running right now, where it sits on the map, and the key gauge stats.
Colorado River Below Lake Granby is flowing at 82 cfs, with the water sitting 3.86 ft at the gage.
This is USGS gauge #09019000 in Colorado. Over the past 10 days the average has been 88 cfs, peaking at 96 cfs.
For real-time updates and historical context, see the realtime view or the historical comparison. Browse other gauges in the Colorado flow report.
Streamflow Forecast
Over the next 5 days, Colorado River Below Lake Granby is expected to hold near today's 82 cfs, toward roughly 79 cfs by 2026-07-19 (likely range 54-115 cfs) -- running well below the seasonal normal.
Powered by PULSE — Snoflo’s forecast engine, trained on this gauge’s full record of storms, snowmelt, and dry spells.
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.
Colorado River Below Lake Granby
The river is fed by several tributaries, including the Fraser River and Williams Fork River, and is regulated by several dams, including the Granby Dam and the Glen Canyon Dam. The flow of water in the river varies seasonally, with peak flows occurring in the spring and early summer. Interesting facts about the hydrology of the Colorado River include its role in providing water for agriculture and urban areas, as well as its importance in supporting a variety of plant and animal species. Additionally, the river is a popular destination for recreational activities such as fishing and rafting.
Nearby streamflow levels
Cross-check Colorado River Below Lake Granby's discharge against nearby gauges to spot whether the change here is local or regional.
| Gauge | Streamflow |
|---|---|
| Colorado River Below Lake Granby | 82 cfs |
| Colorado River Near Granby | 78 cfs |
| Willow Creek Below Willow Creek Reservoir | 7 cfs |
| Colorado River Bl Shadow Mountain Reservoir | 51 cfs |
| Grand Lake Outlet Blw Chipmunk Ln At Grand Lk | 193 cfs |
| Colorado River At Windy Gap | 140 cfs |
Nearby snowpack data
Snowpack at SNOTEL stations near Colorado River Below Lake Granby. 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 |
|---|---|
| Nohrsc Stillwater Creek | 0 in |
| Stillwater Creek | 0 in |
| Grand Lake | 0 in |
| High Lonesome | 0 in |
| Tabernash 2.7 Nw | 1 in |
| High Lonesome | 0 in |
Plan a trip
Reservoirs, boat launches, river runs, and fishing spots within driving distance of Colorado River Below Lake Granby.
Nearby reservoirs
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Boat launches
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River runs
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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 Colorado River Below Lake Granby in the Snoflo app
Save this gauge as a favorite, set push alerts when streamflow crosses a threshold (e.g. "alert me when Colorado River Below Lake Granby crosses 5,000 cfs"), and Snoflo's iOS app will push the moment USGS reports the crossing.
About Colorado River Below Lake Granby
Where does the streamflow data for Colorado River Below Lake Granby come from?
Discharge, gage height, and water temperature come directly from the USGS streamflow gauge 09019000. 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 Colorado River Below Lake Granby 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 Colorado River Below Lake Granby report
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