Illinois River At Lagrange Lock And Dam

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Stage Color Key
21 ft - Near Flood 23 ft - Minor Flood 27 ft - Moderate Flood 29 ft - Major Flood

Latest Observation: Sunday December 28th, 2025 05:00 PM CST
River Status: Normal

  Height Flow
Currently 7.27 ft 6.83 kcfs
Record 34.66 ft 126400 cfs

Forecast
  Date (CST) Stage (ft) Flow (kcfs)
  Wednesday 12/31/1969 06:00 PM 0.00 N/A
  Sunday 12/28/2025 06:00 PM 7.50 8.84
  Monday 12/29/2025 12:00 AM 7.60 8.95
  Monday 12/29/2025 06:00 AM 7.70 9.06
  Monday 12/29/2025 12:00 PM 7.80 9.18
  Monday 12/29/2025 06:00 PM 7.90 9.29
  Tuesday 12/30/2025 12:00 AM 8.00 9.40

Observation
  Date (CST) Stage (ft) Flow (kcfs)
Sunday 12/28/2025 07:00 AM 7.42 8.09
Sunday 12/28/2025 07:30 AM 7.40 7.91
Sunday 12/28/2025 08:00 AM 7.37 7.65
Sunday 12/28/2025 08:30 AM 7.36 7.56
Sunday 12/28/2025 09:00 AM 7.35 7.48
Sunday 12/28/2025 09:30 AM 7.36 7.56
Sunday 12/28/2025 10:00 AM 7.33 7.31
Sunday 12/28/2025 10:30 AM 7.33 7.31
Sunday 12/28/2025 11:00 AM 7.33 7.31
Sunday 12/28/2025 11:30 AM 7.49 8.75
Sunday 12/28/2025 12:00 PM 7.60 8.95
Sunday 12/28/2025 12:30 PM 8.39 10.80
Sunday 12/28/2025 01:00 PM 7.66 9.02
Sunday 12/28/2025 01:30 PM 7.61 8.96
Sunday 12/28/2025 02:00 PM 7.65 9.01
Sunday 12/28/2025 02:30 PM 7.65 9.01
Sunday 12/28/2025 03:00 PM 7.54 8.89
Sunday 12/28/2025 03:30 PM 7.47 8.55
Sunday 12/28/2025 04:00 PM 7.45 8.37
Sunday 12/28/2025 04:30 PM 8.16 9.97

Hydrograph

Data Courtesy of the Advanced Hydrologic Prediction Service
Script Courtesy of Dennis at East Masonville Weather with mods by Saratoga-weather.org