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: Thursday November 20th, 2025 09:00 AM CST
River Status: Normal

  Height Flow
Currently 7.1 ft 6.04 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
  Wednesday 11/19/2025 06:00 PM 6.80 5.31
  Thursday 11/20/2025 12:00 AM 6.80 5.31
  Thursday 11/20/2025 06:00 AM 6.70 5.09
  Thursday 11/20/2025 12:00 PM 6.70 5.09
  Thursday 11/20/2025 06:00 PM 6.70 5.09
  Friday 11/21/2025 12:00 AM 6.70 5.09

Observation
  Date (CST) Stage (ft) Flow (kcfs)
Wednesday 11/19/2025 11:00 PM 7.34 7.39
Wednesday 11/19/2025 11:30 PM 7.37 7.65
Thursday 11/20/2025 12:00 AM 7.36 7.56
Thursday 11/20/2025 12:30 AM 7.36 7.56
Thursday 11/20/2025 01:00 AM 7.36 7.56
Thursday 11/20/2025 01:30 AM 7.35 7.48
Thursday 11/20/2025 02:00 AM 7.36 7.56
Thursday 11/20/2025 02:30 AM 7.35 7.48
Thursday 11/20/2025 03:00 AM 7.32 7.23
Thursday 11/20/2025 03:30 AM 7.37 7.65
Thursday 11/20/2025 04:00 AM 7.34 7.39
Thursday 11/20/2025 04:30 AM 7.32 7.23
Thursday 11/20/2025 05:00 AM 7.34 7.39
Thursday 11/20/2025 05:30 AM 7.33 7.31
Thursday 11/20/2025 06:00 AM 7.35 7.48
Thursday 11/20/2025 06:30 AM 7.19 6.27
Thursday 11/20/2025 07:00 AM 7.18 6.25
Thursday 11/20/2025 07:30 AM 7.14 6.15
Thursday 11/20/2025 08:00 AM 7.20 6.30
Thursday 11/20/2025 08:30 AM 7.24 6.60

Hydrograph

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