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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
- For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
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USGS Water-Year Summary 2024
301429089145600 MISSISSIPPI SOUND AT USGS MERRILL SHELL BANK LIGHT
LOCATION - Lat 30°14'17", long 89°14'34" referenced to North American Datum of 1927, Jackson County, MS, Hydrologic Unit 03170009, St. Stephens Meridian, on the USGS Merrill Shell Bank Light platform, 5 miles south of Pass Christian in the Mississippi Sound.
SURFACE-WATER RECORDS
PERIOD OF RECORD -
GAGE HEIGHT: August 1998 to August 2005; November 2008 to current year.
REMARKS - Gage height records fair. Periods of missing records due to instrument malfunctions.
EXTREMES FOR PERIOD OF RECORD -
GAGE HEIGHT (August 1998 to August 2005): Maximum recorded, 7.68 ft, Sept. 27, 1998, (Hurricane Georges) but may have been higher during periods of instrument malfunction; minimum recorded, -2.39 ft, Dec. 11, 2004, but may have been lower during periods of instrument malfunction.
GAGE HEIGHT (November 2008 to current year): Maximum recorded, 11.57 ft, Aug. 29, 2012 (Hurricane Isaac), but may have been higher during periods of instrument malfunction; minimum recorded, -0.92 ft, Mar. 2, 2009, but may have been lower during periods of instrument malfunction.
WATER-QUALITY RECORDS
PERIOD OF RECORD - Water years 1998 to 2005, 2008 to current year.
PERIOD OF DAILY RECORD -
SPECIFIC CONDUCTANCE: September 1998 to August 2005, November 2008 to current year. WATER TEMPERATURE: August 1998 to August 2005, November 2008 to current year. TURBIDITY: July 2005 to August 2005.
SPECIFIC CONDUCTANCE: September 1998 to August 2005, November 2008 to current year. WATER TEMPERATURE: August 1998 to August 2005, November 2008 to current year. TURBIDITY: July 2005 to August 2005.
INSTRUMENTATION - Submersible transducer and data-collection platform DCP) from August 1998 to August 2005, November 2008 to current year. Datum of gage is assumed and may be different between the two time periods. Water-quality monitor from August 1998 to August 2005, November 2008 to current year. The platform and all equipment were destroyed by Hurricane Katrina on August 28, 2005. A new platform and equipment were installed on November 20, 2008.
REMARKS - 10/01/2013-09/30/2014: Specific conductance records fair. Water temperature records good. Interruptions in the record were due to malfunctions of the instrument.
EXTREMES FOR PERIOD OF DAILY RECORD -
SPECIFIC CONDUCTANCE: Maximum recorded, 53,300 microsiemens, Dec. 9, 2008, but may have been higher during periods of instrument malfunction; minimum recorded, 1,330 microsiemens, Feb. 28, 2013, but may have been lower during periods of instrument malfunction.
WATER TEMPERATURE: Maximum recorded, 33.0 °C, Aug. 20, 2005, but may have been higher during periods of instrument malfunction; minimum recorded, 4.1 °C, Jan. 10,11, 2010, but may have been lower during periods of instrument malfunction.
TURBIDITY (July 2005 to August 2005): Maximum recorded, 110 FNU, Jul. 10, 2005, but may have been higher during periods of instrument malfunction; minimum recorded, 1.0 FNU, on several days in water year 2005, but may have been lower during periods of instrument malfunction.
SPECIFIC CONDUCTANCE: Maximum recorded, 53,300 microsiemens, Dec. 9, 2008, but may have been higher during periods of instrument malfunction; minimum recorded, 1,330 microsiemens, Feb. 28, 2013, but may have been lower during periods of instrument malfunction.
WATER TEMPERATURE: Maximum recorded, 33.0 °C, Aug. 20, 2005, but may have been higher during periods of instrument malfunction; minimum recorded, 4.1 °C, Jan. 10,11, 2010, but may have been lower during periods of instrument malfunction.
TURBIDITY (July 2005 to August 2005): Maximum recorded, 110 FNU, Jul. 10, 2005, but may have been higher during periods of instrument malfunction; minimum recorded, 1.0 FNU, on several days in water year 2005, but may have been lower during periods of instrument malfunction.
