RIVER GAUGE · ROCK RIVER
Rock River at Como
Whiteside County, Illinois
Water level3.45 ft
Flow3,440 cfs
Last readingSep 16, 2026, 5:15 PM UTC (last recorded)
Action10 ft
Minor flood12.5 ft
Moderate flood15.5 ft
Major flood18 ft
The past week
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What floods at each level
- 15.6 ft
Blue Goose Road near Anderson Road east of Lyndon is overtopped and south of Como, water is encroaching onto Prophetstown Road west of Luther Road.
- 12.8 ft
Water begins to encroach into properties on Regan Road northeast of Como.
- 12.3 ft
Water begins to encroach on the parking areas at Lawrence Park boat launch in Sterling and the Moline Road rest area boat launch southwest of Como.
- 10 ft
Water begins to encroach on the parking area at Prophetstown State Park.
Highest crests on record
| Date | Level | Flow |
|---|---|---|
| Jul 23, 2017 | 15.64 ft | 42,200 cfs |
| Mar 16, 2019 | 15.18 ft | 39,900 cfs |
| Feb 21, 2018 | 14.68 ft | 36,900 cfs |
More on Rock River
UpstreamRock River at Dixon
DownstreamRock River near Joslin
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