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 July 20th, 2026 07:00 PM CDT
River Status: Normal

  Height Flow
Currently 17.45 ft 37.7 kcfs
Record 34.66 ft 126400 cfs

Observation
  Date (CDT) Stage (ft) Flow (kcfs)
Monday 07/20/2026 05:00 AM 17.84 N/A
Monday 07/20/2026 05:30 AM 17.82 N/A
Monday 07/20/2026 06:00 AM 17.82 N/A
Monday 07/20/2026 07:30 AM 17.77 N/A
Monday 07/20/2026 08:00 AM 17.75 N/A
Monday 07/20/2026 08:30 AM 17.75 N/A
Monday 07/20/2026 09:00 AM 17.72 N/A
Monday 07/20/2026 12:30 PM 17.63 N/A
Monday 07/20/2026 01:00 PM 17.62 N/A
Monday 07/20/2026 01:30 PM 17.61 N/A
Monday 07/20/2026 02:00 PM 17.59 N/A
Monday 07/20/2026 02:30 PM 17.57 N/A
Monday 07/20/2026 03:00 PM 17.58 N/A
Monday 07/20/2026 03:30 PM 17.57 N/A
Monday 07/20/2026 04:00 PM 17.56 N/A
Monday 07/20/2026 04:30 PM 17.53 N/A
Monday 07/20/2026 05:00 PM 17.51 N/A
Monday 07/20/2026 05:30 PM 17.50 N/A
Monday 07/20/2026 06:00 PM 17.47 N/A
Monday 07/20/2026 06:30 PM 17.48 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