Water Resources of the United States

PROJECT ALERT NOTICE (LA) Project Alert Notification for Mississippi River (LAWSC)

Date: Wed, 29 Aug 2012 11:25:09 EDT

Summary: The USGS continues to closely monitor the flood conditions throuhout the State from Hurricane Isaac detailing specific impact along the Mississippi River and Gulf Coast.

The Mississippi River at Belle Chasse shows a storm surge of approximately 10 feet cresting at 8/28/2012 @ 20:30. The storm surge caused reverse flow within the Mississippi River. The Belle Chasse gage is reporting 182,000 cfs flowing upstream at the crest. The storm surge affects gages along the lower Mississippi River; Baton Rouge shows a surge of over 8 feet, and rising stage is still being reported at the Corp of Engineer's Knox Landing.

Many gages experiencing the storm surge show the specific conductance hydrograph increased along with the stage hydrograph. However, the temperature hydrograph decreases with the passing of the crest. Assume the latent heat of evaporation is cooling the gulf surface waters near the storm surge.

07374527 Northeast Bay Gardene near Point-A-LA-Hache
300722089150100 Mississippi Sound near Grand Pass
07380251 Barataria Bay N of Grand Isle

Mississippi River at Belle Chasse Stage and Discharge
NE Bay Gardene nr Point-A-LA-Hache Specific Conductance

Sub-Region: South Atlantic; Region: Eastern United States

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