Potential Tropical Cyclone 3 continues to slowly organize and may become a tropical storm before landfall tonight. Forward motion has sped up to around 16 mph and towards the north. The system should approach land this evening and make landfall during the overnight hours. Most of the impacts will be along and east of the center of the system.
A Flash Flood Watch is in effect for all of coastal Mississippi and portions of Southeast Louisiana and Southwest Mississippi along and east of Interstate 55. Heavy rain bands will produce rainfall rates and totals that could result in flash, urban and small stream flooding as well as minor to moderate river flooding with new and renewed rises on already elevated rivers.
Coastal Flood Warnings are in effect across the entire Gulf coast from the lower Atchafalaya River to the Mississippi/Alabama state line including inside Lake Borgne from today through Saturday. Coastal inundation of 2 to 3 feet is expected.
Coastal Flood Advisories are in effect for the lakeshore areas along Lake Pontchartrain and Maurepas from today through Sunday. Lakeshore inundation of 1 to 2 feet is expected.
A marginal risk of severe weather will exist today. As rain bands from Potential Tropical Cyclone 3 move across the area, quick short lived tornadoes and waterspouts will be possible.
The Marginal to Slight Risk for severe weather will continue into Saturday for areas east of the I-55 corridor. Main concern continues to be quick short lived tornadoes and waterspouts.
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