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: Thursday August 20th, 2026 06:30 PM CDT
River Status: Normal

  Height Flow
Currently 9.71 ft 153 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
  Thursday 08/20/2026 07:00 PM 9.40 N/A
  Friday 08/21/2026 01:00 AM 9.20 N/A
  Friday 08/21/2026 07:00 AM 9.10 N/A
  Friday 08/21/2026 01:00 PM 8.90 N/A
  Friday 08/21/2026 07:00 PM 8.80 N/A
  Saturday 08/22/2026 01:00 AM 8.70 N/A

Observation
  Date (CDT) Stage (ft) Flow (kcfs)
Thursday 08/20/2026 08:00 AM 9.70 N/A
Thursday 08/20/2026 09:00 AM 9.71 N/A
Thursday 08/20/2026 09:30 AM 9.70 N/A
Thursday 08/20/2026 10:00 AM 9.72 N/A
Thursday 08/20/2026 10:30 AM 9.71 N/A
Thursday 08/20/2026 11:00 AM 9.71 N/A
Thursday 08/20/2026 11:30 AM 9.72 N/A
Thursday 08/20/2026 12:00 PM 9.73 N/A
Thursday 08/20/2026 12:30 PM 9.73 N/A
Thursday 08/20/2026 01:00 PM 9.73 N/A
Thursday 08/20/2026 01:30 PM 9.73 N/A
Thursday 08/20/2026 02:00 PM 9.73 N/A
Thursday 08/20/2026 02:30 PM 9.75 N/A
Thursday 08/20/2026 03:00 PM 9.75 N/A
Thursday 08/20/2026 03:30 PM 9.74 N/A
Thursday 08/20/2026 04:00 PM 9.74 N/A
Thursday 08/20/2026 04:30 PM 9.74 N/A
Thursday 08/20/2026 05:00 PM 9.74 N/A
Thursday 08/20/2026 05:30 PM 9.74 N/A
Thursday 08/20/2026 06:00 PM 9.71 N/A

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