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  • Notice of planned maintenance to underlying USGS network September 24-26, 2021: During this maintenance period users may experience intermittent periods of inaccessibility or delayed delivery of hydrologic data to the USGS National Water Information System (NWIS). Please email gs-w_support_nwisweb@usgs.gov with any concerns regarding impacts to data delivery.
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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.

Logo for USACE Station operated in cooperation with the  U.S. Army Corps of Engineers—St. Louis District



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.



Logo for NOAA, National Weather Service National Weather Service River Forecast



This station managed by the Olivette Field Office.

Available Parameters Period of Record
  
1933-04-01  2021-09-25
1986-11-14  2021-09-26







 (365)
 

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


Discharge, cubic feet per second


Graph of DAILY Discharge, cubic feet per second

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Gage height, feet


Graph of DAILY Gage height, feet

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