Mississippi River At Mel Price (alton) Lock And Dam

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Hydrograph

Stage Color Key
19 ft - Near Flood 21 ft - Minor Flood 29 ft - Moderate Flood 34 ft - Major Flood

Latest Observation: Monday July 20th, 2026 08:00 PM CDT
River Status: Normal

  Height Flow
Currently 8.42 ft 134 kcfs
Record 42.72 ft 369500 cfs

Forecast
  Date (CDT) Stage (ft) Flow (kcfs)
  Wednesday 12/31/1969 06:00 PM 0.00 N/A
  Monday 07/20/2026 07:00 AM 9.90 N/A
  Monday 07/20/2026 01:00 PM 9.80 N/A
  Monday 07/20/2026 07:00 PM 9.70 N/A
  Tuesday 07/21/2026 01:00 AM 9.50 N/A
  Tuesday 07/21/2026 07:00 AM 9.20 N/A
  Tuesday 07/21/2026 01:00 PM 8.90 N/A

Observation
  Date (CDT) Stage (ft) Flow (kcfs)
Monday 07/20/2026 06:30 AM 10.07 N/A
Monday 07/20/2026 07:00 AM 10.06 N/A
Monday 07/20/2026 08:00 AM 10.08 N/A
Monday 07/20/2026 08:30 AM 10.08 N/A
Monday 07/20/2026 09:00 AM 10.06 N/A
Monday 07/20/2026 09:30 AM 10.04 N/A
Monday 07/20/2026 01:00 PM 9.52 N/A
Monday 07/20/2026 01:30 PM 9.45 N/A
Monday 07/20/2026 02:00 PM 9.39 N/A
Monday 07/20/2026 02:30 PM 9.37 N/A
Monday 07/20/2026 03:00 PM 9.34 N/A
Monday 07/20/2026 03:30 PM 9.37 N/A
Monday 07/20/2026 04:00 PM 8.85 N/A
Monday 07/20/2026 04:30 PM 8.82 N/A
Monday 07/20/2026 05:00 PM 8.72 N/A
Monday 07/20/2026 05:30 PM 8.67 N/A
Monday 07/20/2026 06:00 PM 8.54 N/A
Monday 07/20/2026 06:30 PM 8.54 N/A
Monday 07/20/2026 07:00 PM 8.45 N/A
Monday 07/20/2026 07:30 PM 8.48 N/A

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