Illinois River At Lagrange Lock And Dam

Back to River Summary

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

Latest Observation: Thursday November 27th, 2025 09:00 AM CST
River Status: Normal

  Height Flow
Currently 7.19 ft 6.27 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
  Thursday 11/27/2025 06:00 PM 7.20 6.30
  Friday 11/28/2025 12:00 AM 7.20 6.30
  Friday 11/28/2025 06:00 AM 7.10 6.04
  Friday 11/28/2025 12:00 PM 7.00 5.79
  Friday 11/28/2025 06:00 PM 6.90 5.55
  Saturday 11/29/2025 12:00 AM 6.90 5.55

Observation
  Date (CST) Stage (ft) Flow (kcfs)
Wednesday 11/26/2025 11:00 PM 6.56 2.17
Wednesday 11/26/2025 11:30 PM 6.62 4.36
Thursday 11/27/2025 12:00 AM 6.60 4.20
Thursday 11/27/2025 12:30 AM 6.84 5.41
Thursday 11/27/2025 01:00 AM 6.83 5.38
Thursday 11/27/2025 01:30 AM 6.87 5.48
Thursday 11/27/2025 02:00 AM 6.95 5.67
Thursday 11/27/2025 02:30 AM 6.93 5.62
Thursday 11/27/2025 03:00 AM 6.92 5.60
Thursday 11/27/2025 03:30 AM 6.96 5.70
Thursday 11/27/2025 04:00 AM 7.00 5.79
Thursday 11/27/2025 04:30 AM 6.98 5.74
Thursday 11/27/2025 05:00 AM 7.01 5.82
Thursday 11/27/2025 05:30 AM 7.07 5.97
Thursday 11/27/2025 06:00 AM 7.10 6.04
Thursday 11/27/2025 06:30 AM 7.16 6.20
Thursday 11/27/2025 07:00 AM 7.15 6.17
Thursday 11/27/2025 07:30 AM 8.57 11.40
Thursday 11/27/2025 08:00 AM 7.43 8.18
Thursday 11/27/2025 08:30 AM -9,999.00 N/A

Hydrograph

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