Grand Calumet River At Industrial Hwy At Gary flow report
As of July 13, 2026, Grand Calumet River At Industrial Hwy At Gary is flowing at 576 cfs with a gage height of 3.48 ft, receding 23% over the past 24 hours. Source: USGS gauge #04092677, refreshed throughout the day.
Historical Data
Grand Calumet River At Industrial Hwy At Gary at a glance
How Grand Calumet River At Industrial Hwy At Gary is running right now, where it sits on the map, and the key gauge stats.
Grand Calumet River At Industrial Hwy At Gary is flowing at 576 cfs, with the water sitting 3.48 ft at the gage. Flow is down 23% since yesterday as the gauge recedes.
This is USGS gauge #04092677 in Indiana. Over the past 10 days the average has been 660 cfs, peaking at 758 cfs.
Over the next 5 days, Grand Calumet River At Industrial Hwy At Gary is expected to hold near today's 576 cfs, toward roughly 567 cfs by 2026-07-18 (likely range 439-731 cfs) -- running well below the seasonal normal.
For real-time updates and historical context, see the realtime view or the historical comparison. Browse other gauges in the Indiana flow report.
Streamflow Forecast
Powered by PULSE — Snoflo’s Predictive Unified Learning & Simulation Engine, which learns from how this river has answered every past storm, snowmelt, and dry spell to forecast where it’s headed with a precision generic models can’t match.
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.
Grand Calumet River At Industrial Hwy At Gary
The river is heavily polluted with industrial waste from steel mills, oil refineries, and other industries. The main constituents in the river are heavy metals such as lead, mercury, and chromium. There are several tributaries that contribute to the pollution, including the Indiana Harbor Canal and the Little Calumet River. The river is also home to several dams, including the Indiana Harbor Dam and the Grand Calumet Dam. Due to its poor water quality, the river is not suitable for recreational activities.
Nearby streamflow levels
Cross-check Grand Calumet River At Industrial Hwy At Gary's discharge against nearby gauges to spot whether the change here is local or regional.
| Gauge | Streamflow |
|---|---|
| Grand Calumet River At Industrial Hwy At Gary | 576 cfs |
| Indiana Harbor Canal At East Chicago | 1,670 cfs |
| Hart Ditch At Munster | 70 cfs |
| Grand Calumet R At Hohman Ave. At Hammond | 137 cfs |
| Little Calumet River At Munster | 33 cfs |
| Deep River At Lake George Outlet At Hobart | 93 cfs |
Nearby snowpack data
Snowpack at SNOTEL stations near Grand Calumet River At Industrial Hwy At Gary. 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 |
|---|---|
| Dyer 1.0 Wnw | 0 in |
| Portage 2.4 Nnw | 0 in |
| Crown Point 1.1 N | 0 in |
| St. John 0.2 Wsw | 0 in |
| Waste Water Facility | 0 in |
| St. John 2.8 Se | 0 in |
Plan a trip
Reservoirs, boat launches, river runs, and fishing spots within driving distance of Grand Calumet River At Industrial Hwy At Gary.
Boat launches
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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 Grand Calumet River At Industrial Hwy At Gary in the Snoflo app
Save this gauge as a favorite, set push alerts when streamflow crosses a threshold (e.g. "alert me when Grand Calumet River At Industrial Hwy At Gary crosses 5,000 cfs"), and Snoflo's iOS app will push the moment USGS reports the crossing.
About Grand Calumet River At Industrial Hwy At Gary
Where does the streamflow data for Grand Calumet River At Industrial Hwy At Gary come from?
Discharge, gage height, and water temperature come directly from the USGS streamflow gauge 04092677. 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 Grand Calumet River At Industrial Hwy At Gary 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 Grand Calumet River At Industrial Hwy At Gary report
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