River stage
Joslin, Rock River
- River level
- 7.83 ft
- Status
- Below flood stage
- 7-day change
- -2.26 ft
- Recent high
- 12.67 ft
- Recent low
- 4.75 ft
Last reported 2026-10-13 | NWS JOSI2
- 30-day change
- +3.00 ft
- Average
- 7.02 ft
- Readings
- 122
- Data span
- 122 days
- Record crest
- 19.24 ft
In brief
The Rock River at Joslin, IL read 7.83 ft on Oct 13, 2026, 3.17 ft below action stage. That is 3.00 ft higher than 30 days earlier.
Source: National Weather Service gauge JOSI2
River level timeline
Stage threshold profile
Highest crests on record
| Rank | Crest | Date |
|---|---|---|
| 1 | 19.24 ft | 2002-06-07 |
| 2 | 19.11 ft | 2013-04-21 |
| 3 | 18.88 ft | 1997-02-23 |
| 4 | 18.73 ft | 1996-05-31 |
| 5 | 18.55 ft | 2000-06-16 |
| 6 | 18.51 ft | 2017-07-25 |
| 7 | 18.51 ft | 2019-03-16 |
| 8 | 18.36 ft | 2018-02-23 |
Flood crests recorded at this gauge by the National Weather Service.
What happens at each level
- 12.00 ft
Water affects low lying agricultural land.
- 12.50 ft
Water affects some summer cottages along the river.
- 13.00 ft
Flooding of unprotected agricultural land occurs. Water also affects Lundeens Landing Campground.
- 13.70 ft
Water affects Barstow Road between Barstow and Osborn.
- 14.00 ft
Water affects residences in outlying areas immediately along the river including basements, yards, driveways, and access roads.
- 15.00 ft
Water affects residences in the Thompson addition.
- 16.00 ft
Water affects much of Barstow Road between Barstow and Osborn. Water also affects homes in Osborn.
- 16.50 ft
Water affects the lowest sections of Broadway and Main Street in Cleveland and affects a few homes.
- 17.50 ft
Water is across Broadway at Jackson Street in Cleveland.
- 17.70 ft
Water affects the railroad tracks south of Prophetstown.
Written by the local National Weather Service forecast office for this exact gauge.
Frequently asked questions
Is the Rock River flooding at Joslin?
No. The Rock River at Joslin is at 7.83 ft, 3.17 ft below action stage.
What is the flood stage at Joslin?
The National Weather Service sets action stage 11 ft, minor flooding 12 ft, moderate flooding 14 ft and major flooding 16.5 ft.
What is the highest the Rock River has been at Joslin?
The highest crest on record is 19.24 ft, on 2002-06-07.
Is the Rock River high or low right now at Joslin?
At 7.83 ft it is higher than 64% of readings over the last 122 days.
Stage and flood information from the NOAA National Weather Service (gauge JOSI2); daily history from the U.S. Geological Survey (site 05446500). Last reading 2026-10-13. For flood safety decisions always follow official National Weather Service warnings.