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* IMPORTANT: Next Generation Station Page

Boating safety tips are available from the U.S. Coast Guard.

NOTE: During cold periods, gage height and streamflow information may be adversely affected by ice.


USGS 05587450 Mississippi River at Grafton, IL

PROVISIONAL DATA SUBJECT TO REVISION

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NOTE: Due to the nature of the hydraulic conditions at this site, the Provisional Discharges are more likely to change during the quality assurance process.

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The precipitation data for this station are temporary and will only be displayed for 120 days. Time series of cumulative daily values will NOT be available for retrieval following the 120-day display period. Although the instrumentation is calibrated at least once/year, the temporary classification means that documented routine inspections and other quality assurance measures are not performed that would make the data acceptable for archival, retrieval, or future use in general scientific or interpretive studies.



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This station managed by the Rolla Field Office.

Available Parameters Available Period
  
2019-08-13  2019-12-11
2007-10-01  2019-12-11
2007-10-01  2019-12-11







 (7)
 

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Summary of all available data for this site
Instantaneous-data availability statement


Discharge, cubic feet per second

Most recent instantaneous value: 186000 12-11-2019   02:00 CST
Graph of  Discharge, cubic feet per second

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Daily discharge, cubic feet per second -- statistics for Dec 11 based on 33 water years of record more
Min
(1990)
25th
percen-
tile
Median Mean 75th
percen-
tile
Max
(1987)
Most Recent
Instantaneous
Value Dec 11
30500 49600 80400 87500 124000 167000 186000


Gage height, feet

Most recent instantaneous value: 15.85 12-11-2019   02:00 CST
Graph of  Gage height, feet

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