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: Wednesday May 20th, 2026 07:00 AM CDT
River Status: Normal

  Height Flow
Currently 12.97 ft 201 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
  Wednesday 05/20/2026 07:00 AM 12.50 N/A
  Wednesday 05/20/2026 01:00 PM 12.60 N/A
  Wednesday 05/20/2026 07:00 PM 12.70 N/A
  Thursday 05/21/2026 01:00 AM 12.70 N/A
  Thursday 05/21/2026 07:00 AM 12.60 N/A
  Thursday 05/21/2026 01:00 PM 12.50 N/A

Observation
  Date (CDT) Stage (ft) Flow (kcfs)
Tuesday 05/19/2026 09:30 PM 12.01 N/A
Tuesday 05/19/2026 10:00 PM 12.02 N/A
Tuesday 05/19/2026 10:30 PM 12.04 N/A
Tuesday 05/19/2026 11:00 PM 12.07 N/A
Tuesday 05/19/2026 11:30 PM 12.12 N/A
Wednesday 05/20/2026 12:00 AM 12.14 N/A
Wednesday 05/20/2026 12:30 AM 12.18 N/A
Wednesday 05/20/2026 01:00 AM 12.22 N/A
Wednesday 05/20/2026 01:30 AM 12.27 N/A
Wednesday 05/20/2026 02:00 AM 12.31 N/A
Wednesday 05/20/2026 02:30 AM 12.36 N/A
Wednesday 05/20/2026 03:00 AM 12.41 N/A
Wednesday 05/20/2026 03:30 AM 12.48 N/A
Wednesday 05/20/2026 04:00 AM 12.54 N/A
Wednesday 05/20/2026 04:30 AM 12.61 N/A
Wednesday 05/20/2026 05:00 AM 12.68 N/A
Wednesday 05/20/2026 05:30 AM 12.75 N/A
Wednesday 05/20/2026 06:00 AM 12.82 N/A
Wednesday 05/20/2026 06:30 AM 12.89 N/A
Wednesday 05/20/2026 07:00 AM 12.97 N/A

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