Tropical Storm Bertha Prompts Watches and Warnings Along Gulf Coast
• Tropical Storm Bertha has formed in the Gulf of Mexico, with maximum sustained winds of 50 mph (80 km/h) as of the 4 a.m. advisory on July 21,
• The storm is moving slowly northwestward at 5 mph (8 km/h) and is expected to turn westward by midweek. Tropical storm-force winds extend up to 80 miles (129 km) from the center. Watches and warnings have been issued, including a Tropical Storm Warning from the Jefferson/Plaquemines Parish border in Louisiana to the Alabama/Florida border, and a Tropical Storm Watch westward to Morgan City, Louisiana. A Storm Surge Watch is also in effect for areas from the mouth of the Mississippi River to the Alabama/Florida border. The storm is forecast to weaken to a tropical depression by Thursday as it tracks along the Louisiana coast.
Impact & Risks
The primary risks from Tropical Storm Bertha include storm surge, tropical storm-force winds, and localized flooding. Storm surge values are forecast to peak at 2-4 feet along eastern-facing shores of southeast Louisiana, with 1-3 feet expected in Lakes Pontchartrain and Maurepas. Coastal areas of southeast Louisiana face the highest risk of tropical storm-force winds, which could damage vessels and reduce visibility. Rainfall totals are expected to range from 1-3 inches in coastal areas, with minor flooding possible. The tornado threat remains very low.
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