ROCK RIVER AT ROCKTON, IL
USGS 05437500 · Illinois · reports discharge (live), gauge height
Reading ROCK RIVER AT ROCKTON, IL…
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USGS 05437500 · Illinois · reports discharge (live), gauge height
General guidance from the readings and the published lines named above, not a fishing forecast. Local rules and closures come first.
Reading Nov 5, 9:30 PM CST · provisional USGS data
Normal for Nov 5 Steady · 24 h Below NWS action stage
Discharge, last 7 days: 168 readings from Oct 29, 11:45 PM CDT to Nov 5, 9:30 PM CST; ranging 3,050 to 4,070 ft³/s; latest 3,990 ft³/s; shaded band: typical range (25th–75th percentile) for each date.
USGS provisional data may be revised. Source: USGS instantaneous values.
| Time | Discharge (ft³/s) | Gauge height (ft) | Normal, 25th–75th (ft³/s) |
|---|---|---|---|
| Nov 5, 9:30 PM CST | 3,990 | 4.67 | 2,090–4,970 |
| Nov 5, 8:30 PM CST | 3,990 | 4.67 | 2,090–4,970 |
| Nov 5, 7:30 PM CST | 3,990 | 4.67 | 2,090–4,970 |
| Nov 5, 6:30 PM CST | 4,000 | 4.68 | 2,090–4,970 |
| Nov 5, 5:30 PM CST | 4,040 | 4.7 | 2,090–4,970 |
| Nov 5, 4:30 PM CST | 4,070 | 4.72 | 2,090–4,970 |
| Nov 5, 3:30 PM CST | 4,050 | 4.71 | 2,090–4,970 |
| Nov 5, 2:30 PM CST | 4,000 | 4.68 | 2,090–4,970 |
| Nov 5, 1:30 PM CST | 3,960 | 4.65 | 2,090–4,970 |
| Nov 5, 12:30 PM CST | 3,880 | 4.6 | 2,090–4,970 |
| Nov 5, 11:30 AM CST | 3,810 | 4.56 | 2,090–4,970 |
| Nov 5, 10:30 AM CST | 3,810 | 4.56 | 2,090–4,970 |
| Nov 5, 9:30 AM CST | 3,810 | 4.56 | 2,090–4,970 |
| Nov 5, 8:30 AM CST | 3,810 | 4.56 | 2,090–4,970 |
| Nov 5, 7:30 AM CST | 3,810 | 4.56 | 2,090–4,970 |
| Nov 5, 6:30 AM CST | 3,810 | 4.56 | 2,090–4,970 |
| Nov 5, 5:30 AM CST | 3,810 | 4.56 | 2,090–4,970 |
| Nov 5, 4:30 AM CST | 3,810 | 4.56 | 2,090–4,970 |
| Nov 5, 3:30 AM CST | 3,830 | 4.57 | 2,090–4,970 |
| Nov 5, 2:30 AM CST | 3,860 | 4.59 | 2,090–4,970 |
| Nov 5, 1:30 AM CST | 3,920 | 4.63 | 2,090–4,970 |
| Nov 5, 12:30 AM CST | 3,970 | 4.66 | 2,090–4,970 |
| Nov 4, 11:30 PM CST | 3,990 | 4.67 | 1,960–4,970 |
| Nov 4, 10:30 PM CST | 3,940 | 4.64 | 1,960–4,970 |
| Nov 4, 9:30 PM CST | 3,880 | 4.6 | 1,960–4,970 |
| Nov 4, 8:30 PM CST | 3,800 | 4.55 | 1,960–4,970 |
| Nov 4, 7:30 PM CST | 3,750 | 4.52 | 1,960–4,970 |
| Nov 4, 6:30 PM CST | 3,750 | 4.52 | 1,960–4,970 |
| Nov 4, 5:30 PM CST | 3,750 | 4.52 | 1,960–4,970 |
| Nov 4, 4:30 PM CST | 3,740 | 4.51 | 1,960–4,970 |
| Nov 4, 3:30 PM CST | 3,740 | 4.51 | 1,960–4,970 |
| Nov 4, 2:30 PM CST | 3,750 | 4.52 | 1,960–4,970 |
| Nov 4, 1:30 PM CST | 3,780 | 4.54 | 1,960–4,970 |
| Nov 4, 12:30 PM CST | 3,830 | 4.57 | 1,960–4,970 |
| Nov 4, 11:30 AM CST | 3,850 | 4.58 | 1,960–4,970 |
| Nov 4, 10:30 AM CST | 3,860 | 4.59 | 1,960–4,970 |
| Nov 4, 9:30 AM CST | 3,910 | 4.62 | 1,960–4,970 |
| Nov 4, 8:30 AM CST | 3,860 | 4.59 | 1,960–4,970 |
| Nov 4, 7:30 AM CST | 3,780 | 4.54 | 1,960–4,970 |
| Nov 4, 6:30 AM CST | 3,710 | 4.49 | 1,960–4,970 |
| Nov 4, 5:30 AM CST | 3,710 | 4.49 | 1,960–4,970 |
| Nov 4, 4:30 AM CST | 3,710 | 4.49 | 1,960–4,970 |
| Nov 4, 3:30 AM CST | 3,710 | 4.49 | 1,960–4,970 |
| Nov 4, 2:30 AM CST | 3,710 | 4.49 | 1,960–4,970 |
| Nov 4, 1:30 AM CST | 3,690 | 4.48 | 1,960–4,970 |
| Nov 4, 12:30 AM CST | 3,690 | 4.48 | 1,960–4,970 |
| Nov 3, 11:30 PM CST | 3,680 | 4.47 | 1,880–5,020 |
| Nov 3, 10:30 PM CST | 3,640 | 4.45 | 1,880–5,020 |
| Nov 3, 9:30 PM CST | 3,680 | 4.47 | 1,880–5,020 |
| Nov 3, 8:30 PM CST | 3,660 | 4.46 | 1,880–5,020 |
| Nov 3, 7:30 PM CST | 3,660 | 4.46 | 1,880–5,020 |
| Nov 3, 6:30 PM CST | 3,680 | 4.47 | 1,880–5,020 |
| Nov 3, 5:30 PM CST | 3,690 | 4.48 | 1,880–5,020 |
| Nov 3, 4:30 PM CST | 3,690 | 4.48 | 1,880–5,020 |
| Nov 3, 3:30 PM CST | 3,680 | 4.47 | 1,880–5,020 |
| Nov 3, 2:30 PM CST | 3,660 | 4.46 | 1,880–5,020 |
| Nov 3, 1:30 PM CST | 3,580 | 4.41 | 1,880–5,020 |
| Nov 3, 12:30 PM CST | 3,490 | 4.35 | 1,880–5,020 |
| Nov 3, 11:30 AM CST | 3,400 | 4.29 | 1,880–5,020 |
| Nov 3, 10:30 AM CST | 3,370 | 4.27 | 1,880–5,020 |
| Nov 3, 9:30 AM CST | 3,340 | 4.25 | 1,880–5,020 |
| Nov 3, 8:30 AM CST | 3,310 | 4.23 | 1,880–5,020 |
| Nov 3, 7:30 AM CST | 3,330 | 4.24 | 1,880–5,020 |
| Nov 3, 6:30 AM CST | 3,340 | 4.25 | 1,880–5,020 |
| Nov 3, 5:30 AM CST | 3,360 | 4.26 | 1,880–5,020 |
| Nov 3, 4:30 AM CST | 3,390 | 4.28 | 1,880–5,020 |
| Nov 3, 3:30 AM CST | 3,430 | 4.31 | 1,880–5,020 |
| Nov 3, 2:30 AM CST | 3,510 | 4.36 | 1,880–5,020 |
| Nov 3, 1:30 AM CST | 3,550 | 4.39 | 1,880–5,020 |
| Nov 3, 12:30 AM CST | 3,540 | 4.38 | 1,880–5,020 |
| Nov 2, 11:30 PM CST | 3,510 | 4.36 | 1,900–5,100 |
| Nov 2, 10:30 PM CST | 3,430 | 4.31 | 1,900–5,100 |
| Nov 2, 9:30 PM CST | 3,340 | 4.25 | 1,900–5,100 |
| Nov 2, 8:30 PM CST | 3,340 | 4.25 | 1,900–5,100 |
| Nov 2, 7:30 PM CST | 3,340 | 4.25 | 1,900–5,100 |
| Nov 2, 6:30 PM CST | 3,340 | 4.25 | 1,900–5,100 |
| Nov 2, 5:30 PM CST | 3,360 | 4.26 | 1,900–5,100 |
| Nov 2, 4:30 PM CST | 3,370 | 4.27 | 1,900–5,100 |
| Nov 2, 3:30 PM CST | 3,390 | 4.28 | 1,900–5,100 |
| Nov 2, 2:30 PM CST | 3,430 | 4.31 | 1,900–5,100 |
| Nov 2, 1:30 PM CST | 3,520 | 4.37 | 1,900–5,100 |
| Nov 2, 12:30 PM CST | 3,580 | 4.41 | 1,900–5,100 |
| Nov 2, 11:30 AM CST | 3,580 | 4.41 | 1,900–5,100 |
| Nov 2, 10:30 AM CST | 3,510 | 4.36 | 1,900–5,100 |
| Nov 2, 9:30 AM CST | 3,210 | 4.16 | 1,900–5,100 |
| Nov 2, 8:30 AM CST | 3,340 | 4.25 | 1,900–5,100 |
| Nov 2, 7:30 AM CST | 3,340 | 4.25 | 1,900–5,100 |
| Nov 2, 6:30 AM CST | 3,340 | 4.25 | 1,900–5,100 |
| Nov 2, 5:30 AM CST | 3,340 | 4.25 | 1,900–5,100 |
| Nov 2, 4:30 AM CST | 3,360 | 4.26 | 1,900–5,100 |
| Nov 2, 3:30 AM CST | 3,370 | 4.27 | 1,900–5,100 |
| Nov 2, 2:30 AM CST | 3,420 | 4.3 | 1,900–5,100 |
| Nov 2, 1:30 AM CST | 3,480 | 4.34 | 1,900–5,100 |
| Nov 2, 12:30 AM CST | 3,540 | 4.38 | 1,900–5,100 |
| Nov 1, 11:30 PM CST | 3,570 | 4.4 | 1,820–4,940 |
| Nov 1, 10:30 PM CST | 3,520 | 4.37 | 1,820–4,940 |
| Nov 1, 9:30 PM CST | 3,460 | 4.33 | 1,820–4,940 |
| Nov 1, 8:30 PM CST | 3,370 | 4.27 | 1,820–4,940 |
| Nov 1, 7:30 PM CST | 3,340 | 4.25 | 1,820–4,940 |
| Nov 1, 6:30 PM CST | 3,360 | 4.26 | 1,820–4,940 |
| Nov 1, 5:30 PM CST | 3,360 | 4.26 | 1,820–4,940 |
| Nov 1, 4:30 PM CST | 3,370 | 4.27 | 1,820–4,940 |
| Nov 1, 3:30 PM CST | 3,390 | 4.28 | 1,820–4,940 |
| Nov 1, 2:30 PM CST | 3,430 | 4.31 | 1,820–4,940 |
| Nov 1, 1:30 PM CST | 3,510 | 4.36 | 1,820–4,940 |
| Nov 1, 12:30 PM CST | 3,550 | 4.39 | 1,820–4,940 |
| Nov 1, 11:30 AM CST | 3,550 | 4.39 | 1,820–4,940 |
| Nov 1, 10:30 AM CST | 3,480 | 4.34 | 1,820–4,940 |
| Nov 1, 9:30 AM CST | 3,400 | 4.29 | 1,820–4,940 |
| Nov 1, 8:30 AM CST | 3,340 | 4.25 | 1,820–4,940 |
| Nov 1, 7:30 AM CST | 3,340 | 4.25 | 1,820–4,940 |
| Nov 1, 6:30 AM CST | 3,340 | 4.25 | 1,820–4,940 |
| Nov 1, 5:30 AM CST | 3,360 | 4.26 | 1,820–4,940 |
| Nov 1, 4:30 AM CST | 3,360 | 4.26 | 1,820–4,940 |
| Nov 1, 3:30 AM CST | 3,390 | 4.28 | 1,820–4,940 |
| Nov 1, 2:30 AM CST | 3,430 | 4.31 | 1,820–4,940 |
| Nov 1, 1:30 AM CST | 3,490 | 4.35 | 1,820–4,940 |
| Nov 1, 1:30 AM CDT | 3,570 | 4.4 | 1,820–4,940 |
| Nov 1, 12:30 AM CDT | 3,570 | 4.4 | 1,890–5,040 |
| Oct 31, 11:30 PM CDT | 3,520 | 4.37 | 1,890–5,040 |
| Oct 31, 10:30 PM CDT | 3,460 | 4.33 | 1,890–5,040 |
| Oct 31, 9:30 PM CDT | 3,370 | 4.27 | 1,890–5,040 |
| Oct 31, 8:30 PM CDT | 3,360 | 4.26 | 1,890–5,040 |
| Oct 31, 7:30 PM CDT | 3,340 | 4.25 | 1,890–5,040 |
| Oct 31, 6:30 PM CDT | 3,360 | 4.26 | 1,890–5,040 |
| Oct 31, 5:30 PM CDT | 3,370 | 4.27 | 1,890–5,040 |
| Oct 31, 4:30 PM CDT | 3,390 | 4.28 | 1,890–5,040 |
| Oct 31, 3:30 PM CDT | 3,430 | 4.31 | 1,890–5,040 |
| Oct 31, 2:30 PM CDT | 3,490 | 4.35 | 1,890–5,040 |
| Oct 31, 1:30 PM CDT | 3,570 | 4.4 | 1,890–5,040 |
| Oct 31, 12:30 PM CDT | 3,570 | 4.4 | 1,890–5,040 |
| Oct 31, 11:30 AM CDT | 3,540 | 4.38 | 1,890–5,040 |
| Oct 31, 10:30 AM CDT | 3,480 | 4.34 | 1,890–5,040 |
| Oct 31, 9:30 AM CDT | 3,390 | 4.28 | 1,890–5,040 |
| Oct 31, 8:30 AM CDT | 3,360 | 4.26 | 1,890–5,040 |
| Oct 31, 7:30 AM CDT | 3,360 | 4.26 | 1,890–5,040 |
| Oct 31, 6:30 AM CDT | 3,370 | 4.27 | 1,890–5,040 |
| Oct 31, 5:30 AM CDT | 3,400 | 4.29 | 1,890–5,040 |
| Oct 31, 4:30 AM CDT | 3,420 | 4.3 | 1,890–5,040 |
| Oct 31, 3:30 AM CDT | 3,490 | 4.35 | 1,890–5,040 |
| Oct 31, 2:30 AM CDT | 3,570 | 4.4 | 1,890–5,040 |
| Oct 31, 1:30 AM CDT | 3,600 | 4.42 | 1,890–5,040 |
| Oct 31, 12:30 AM CDT | 3,600 | 4.42 | 1,780–4,970 |
| Oct 30, 11:30 PM CDT | 3,550 | 4.39 | 1,780–4,970 |
| Oct 30, 10:30 PM CDT | 3,490 | 4.35 | 1,780–4,970 |
| Oct 30, 9:30 PM CDT | 3,420 | 4.3 | 1,780–4,970 |
| Oct 30, 8:30 PM CDT | 3,330 | 4.24 | 1,780–4,970 |
| Oct 30, 7:30 PM CDT | 3,340 | 4.25 | 1,780–4,970 |
| Oct 30, 6:30 PM CDT | 3,340 | 4.25 | 1,780–4,970 |
| Oct 30, 5:30 PM CDT | 3,360 | 4.26 | 1,780–4,970 |
| Oct 30, 4:30 PM CDT | 3,340 | 4.25 | 1,780–4,970 |
| Oct 30, 3:30 PM CDT | 3,340 | 4.25 | 1,780–4,970 |
| Oct 30, 2:30 PM CDT | 3,340 | 4.25 | 1,780–4,970 |
| Oct 30, 1:30 PM CDT | 3,340 | 4.25 | 1,780–4,970 |
| Oct 30, 12:30 PM CDT | 3,360 | 4.26 | 1,780–4,970 |
| Oct 30, 11:30 AM CDT | 3,370 | 4.27 | 1,780–4,970 |
| Oct 30, 10:30 AM CDT | 3,420 | 4.3 | 1,780–4,970 |
| Oct 30, 9:30 AM CDT | 3,450 | 4.32 | 1,780–4,970 |
| Oct 30, 8:30 AM CDT | 3,450 | 4.32 | 1,780–4,970 |
| Oct 30, 7:30 AM CDT | 3,420 | 4.3 | 1,780–4,970 |
| Oct 30, 6:30 AM CDT | 3,370 | 4.27 | 1,780–4,970 |
| Oct 30, 5:30 AM CDT | 3,270 | 4.2 | 1,780–4,970 |
| Oct 30, 4:30 AM CDT | 3,120 | 4.1 | 1,780–4,970 |
| Oct 30, 3:30 AM CDT | 3,050 | 4.05 | 1,780–4,970 |
| Oct 30, 2:30 AM CDT | 3,120 | 4.1 | 1,780–4,970 |
| Oct 30, 1:30 AM CDT | 3,270 | 4.2 | 1,780–4,970 |
| Oct 30, 12:30 AM CDT | 3,400 | 4.29 | 1,880–4,940 |
| Oct 29, 11:45 PM CDT | 3,430 | 4.31 | 1,880–4,940 |
Map of USGS gauge 05437500 and the river around it
Where ROCK RIVER AT ROCKTON, IL sits, with 6 other gauges on the same river and our water's map point.
No current water-temperature reading at this gauge, so no temperature guidance is given. Take a stream thermometer. Illinois DNR publishes no water-temperature line for trout anglers that we found. The lines below are the National Park Service's, federal guidance, not a Illinois rule: 68°F.
Normal for Nov 5: 2,090–4,970 ft³/s (middle half of 87 years of record). Now: 3,990 ft³/s, normal.
Normal for this date. 3,990 ft³/s is between the 25th and 75th percentiles of daily mean flow for Nov 5 at this gauge over 87 years of record (1940–2026): 10th 1,230, 25th 2,090, median 3,430, 75th 4,970, 90th 8,210 ft³/s.
Daily means on record for Nov 5: lowest 854 ft³/s, highest 12,700 ft³/s.
Classes as USGS labels them (hyswap: flow categories (WDFN_stats schema) (U.S. Geological Survey) ); percentiles from the USGS daily statistics (U.S. Geological Survey) (approved daily means; the reading is provisional and instantaneous).
Steady over 24 hours (+2.8% discharge). Rising or falling means a change of more than 10% in discharge (or 0.2 ft of gauge height) over 24 hours; our rule of thumb, not a USGS class.
Species the agency lists for Rock River: Smallmouth Bass.
Source: Site-specific smallmouth bass regulations on rivers and creeks (Illinois Department of Natural Resources).
Below NWS action stage. The National Weather Service reports this gauge below its action stage. That is not a statement that wading is safe.
Flood categories: action stage, minor, moderate and major flooding (National Weather Service)Turn Around Don't Drown. “A mere 6 inches of fast-moving flood water can knock over an adult.” No flow number makes a crossing safe; if in doubt, stay out.
Turn Around Don't Drown (National Weather Service)Guidance from the readings above and the published thresholds named with each line; not a fishing forecast, a safety guarantee or a statement about access. Local rules and closures come first.
Below NWS action stage. The National Weather Service reports this gauge below its action stage. That is not a statement that wading is safe.
NWS observed 4.67 ft stage, 3,990 ft³/s at Nov 5, 9:30 PM CST (NWS gauge ROKI2; its stage datum can differ from the USGS gauge height).
Forecasts are issued as needed during times of high water, but are not routinely available.
Open the NWS gauge page · What the categories mean (National Weather Service)
Checked Nov 5, 10:38 PM CST; readings refresh at most every 15 minutes and statistics daily. Provisional USGS data can be revised. Conditions change: re-check before you go. This is general guidance, not a fishing forecast, a safety guarantee or a statement about access.