Mackinaw River Near Green Valley flow report
As of July 12, 2026, Mackinaw River Near Green Valley is flowing at 1,670 cfs with a gage height of 16.59 ft, rising 88% over the past 24 hours. Source: USGS gauge #05568000, refreshed throughout the day.
Historical Data
Mackinaw River Near Green Valley at a glance
How Mackinaw River Near Green Valley is running right now, where it sits on the map, and the key gauge stats.
Mackinaw River Near Green Valley is flowing at 1,670 cfs, with the water sitting 16.59 ft at the gage. Flow is up 88% since yesterday — a rising hydrograph.
This is USGS gauge #05568000 in Illinois. Over the past 10 days the average has been 1,451 cfs, peaking at 2,100 cfs.
Over the next 5 days, Mackinaw River Near Green Valley is expected to recede from today's 1670 cfs, toward roughly 1056 cfs by 2026-07-17 (likely range 298-3739 cfs) -- about normal for the date.
For real-time updates and historical context, see the realtime view or the historical comparison. Browse other gauges in the Illinois 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.
Mackinaw River Near Green Valley
The river is fed by several small tributaries and is not affected by any major dams. Seasonal trends show increased flow during the spring due to snow melt and precipitation, while summer and fall see lower flow rates. The river is known for its diverse aquatic life, including numerous fish species and freshwater mussels. Interesting facts include the presence of rare fossils in the area, as well as the river's use for recreation such as kayaking and fishing.
Nearby streamflow levels
Cross-check Mackinaw River Near Green Valley's discharge against nearby gauges to spot whether the change here is local or regional.
| Gauge | Streamflow |
|---|---|
| Mackinaw River Near Green Valley | 1,670 cfs |
| Illinois River At Kingston Mines | 37,800 cfs |
| Farm Creek At Farmdale | 24 cfs |
| Fondulac Creek Near East Peoria | 1 cfs |
| Mackinaw River Near Congerville | 1,210 cfs |
| Salt Creek Near Greenview | 1,470 cfs |
Nearby snowpack data
Snowpack at SNOTEL stations near Mackinaw River Near Green Valley. 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 |
|---|---|
| Peoria 3.4 Wnw | 0 in |
| Lincoln 4.6 W | 0 in |
| Central Illinois | 0 in |
| Bloomington 5.0 Wsw | 0 in |
| Bloomington 2.7 Ne | 0 in |
| El Paso 5.2 Nnw | 0 in |
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 Mackinaw River Near Green Valley in the Snoflo app
Save this gauge as a favorite, set push alerts when streamflow crosses a threshold (e.g. "alert me when Mackinaw River Near Green Valley crosses 5,000 cfs"), and Snoflo's iOS app will push the moment USGS reports the crossing.
About Mackinaw River Near Green Valley
Where does the streamflow data for Mackinaw River Near Green Valley come from?
Discharge, gage height, and water temperature come directly from the USGS streamflow gauge 05568000. 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 Mackinaw River Near Green Valley 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 Mackinaw River Near Green Valley report
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