- Stage now
- -
- 24 hour change
- -
- Rank
- -
- Elevation
- 623 ftabove sea level
- County
- Cook County
- Position
- 41.5800° N, 87.6200° W
- Record since
- 2026
Water level
Thornton - Calumet Deep Tunnel
Stage is the height of the water's surface above the gauge's own fixed zero, in feet, not the depth of the water. Every point drawn is a reading the gauge sent, at the time it sent it.
The whole record, Jul 6, 2026 to Jul 10, 2026, 4 days reported.
The readings these charts were drawn from, as a table
| Year | Highest ft | Lowest ft | Average ft | Days reported |
|---|---|---|---|---|
| 2026 | -22.00 Jul 6, 2026 | -41.00 Jul 10, 2026 | -33.60 | 4 |
How it reports
- Rank
- -
- Reports received, 7 days
- 1
- Longest silence, 7 days
- 17 h 38 minfrom Sep 26, 7:00 AM
- Latest report
- Sep 26, 7:00 AMlocal time
- Time to reach Storm Station
- 12 h 15 min
Near Thornton - Calumet Deep Tunnel
Gauges
Weather instruments
How to read a gauge
A gauge measures the height of the water where it stands, its stage, in feet above a fixed mark at that gauge. Two gauges' stages are not comparable: each is measured from its own mark, and a reservoir's is often its height above sea level.
The stage shown is the latest the gauge reported, with the time it reported it. Storm Station hears each gauge on its own schedule and ranks it among its state's stations by how reliably it reports: that is its 247 rank.