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: Monday December 1st, 2025 10:00 AM CST
River Status: Normal

  Height Flow
Currently 6.77 ft 5.24 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 11/30/2025 06:00 PM 7.00 5.79
  Monday 12/01/2025 12:00 AM 7.00 5.79
  Monday 12/01/2025 06:00 AM 7.10 6.04
  Monday 12/01/2025 12:00 PM 7.10 6.04
  Monday 12/01/2025 06:00 PM 7.20 6.30
  Tuesday 12/02/2025 12:00 AM 7.20 6.30

Observation
  Date (CST) Stage (ft) Flow (kcfs)
Monday 12/01/2025 12:00 AM 6.94 5.65
Monday 12/01/2025 12:30 AM 6.96 5.70
Monday 12/01/2025 01:00 AM 6.94 5.65
Monday 12/01/2025 01:30 AM 6.95 5.67
Monday 12/01/2025 02:00 AM 6.95 5.67
Monday 12/01/2025 02:30 AM 6.85 5.43
Monday 12/01/2025 03:00 AM 8.13 9.86
Monday 12/01/2025 03:30 AM 6.80 5.31
Monday 12/01/2025 04:00 AM 6.81 5.34
Monday 12/01/2025 04:30 AM 6.79 5.29
Monday 12/01/2025 05:00 AM 6.76 5.22
Monday 12/01/2025 05:30 AM 6.81 5.34
Monday 12/01/2025 06:00 AM 6.84 5.41
Monday 12/01/2025 06:30 AM 6.77 5.24
Monday 12/01/2025 07:00 AM 8.29 10.50
Monday 12/01/2025 07:30 AM 6.69 4.99
Monday 12/01/2025 08:00 AM 6.68 4.90
Monday 12/01/2025 08:30 AM 6.65 4.62
Monday 12/01/2025 09:00 AM 6.66 4.71
Monday 12/01/2025 09:30 AM 6.65 4.62

Hydrograph

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