Mississippi River At Quincy Lock And Dam 21

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Hydrograph

Stage Color Key
16 ft - Near Flood 18 ft - Minor Flood 21 ft - Moderate Flood 25 ft - Major Flood

Latest Observation: Tuesday September 22nd, 2026 05:00 AM CDT
River Status: Normal

  Height Flow
Currently 12.39 ft 150 kcfs
Record 31.3 ft 428694 cfs

Forecast
  Date (CDT) Stage (ft) Flow (kcfs)
  Wednesday 12/31/1969 06:00 PM 0.00 N/A
  Tuesday 09/22/2026 07:00 AM 12.60 154.00
  Tuesday 09/22/2026 01:00 PM 13.00 160.00
  Tuesday 09/22/2026 07:00 PM 13.70 168.00
  Wednesday 09/23/2026 01:00 AM 14.20 174.00
  Wednesday 09/23/2026 07:00 AM 14.60 179.00
  Wednesday 09/23/2026 01:00 PM 15.00 184.00

Observation
  Date (CDT) Stage (ft) Flow (kcfs)
Tuesday 09/22/2026 01:40 AM 12.16 147.00
Tuesday 09/22/2026 01:50 AM 12.19 147.00
Tuesday 09/22/2026 02:00 AM 12.19 147.00
Tuesday 09/22/2026 02:10 AM 12.20 147.00
Tuesday 09/22/2026 02:20 AM 12.21 147.00
Tuesday 09/22/2026 02:30 AM 12.24 148.00
Tuesday 09/22/2026 02:40 AM 12.23 148.00
Tuesday 09/22/2026 02:50 AM 12.23 148.00
Tuesday 09/22/2026 03:00 AM 12.26 148.00
Tuesday 09/22/2026 03:10 AM 12.28 149.00
Tuesday 09/22/2026 03:20 AM 12.27 148.00
Tuesday 09/22/2026 03:30 AM 12.31 149.00
Tuesday 09/22/2026 03:40 AM 12.32 149.00
Tuesday 09/22/2026 03:50 AM 12.32 149.00
Tuesday 09/22/2026 04:00 AM 12.36 150.00
Tuesday 09/22/2026 04:10 AM 12.34 150.00
Tuesday 09/22/2026 04:20 AM 12.36 150.00
Tuesday 09/22/2026 04:30 AM 12.38 150.00
Tuesday 09/22/2026 04:40 AM 12.38 150.00
Tuesday 09/22/2026 04:50 AM 12.39 150.00

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