The fifth tropical cyclone and fifth named storm of the hurricane season, Edouard developed from a trough in the northern Gulf of Mexico on August 3.

However, northerly wind shear initially halted any further significant intensification and also caused the storm to struggle to maintain deep convection over the center.

Edouard quickly weakened and was downgraded to tropical depression by early on August 6, six hours before degenerated into a remnant low pressure area.

Minor inland flooding occurred due to heavy rainfall, with a portion of Texas State Highway 36 being temporarily shutdown.

On August 2, 2008, a trough entered the northern Gulf of Mexico,[1] with a low pressure area developing near Apalachicola, Florida.

[3] On the afternoon of August 3, a Hurricane Hunters flight into the system confirmed the development of a well-defined center of circulation, slightly exposed from a disorganized area of thunderstorms.

[4] As a result, the system developed into Tropical Depression Five at 1200 UTC on August 3, while located about 85 miles (140 km) south of the mouth of the Mississippi River.

[5] Because the depression was initially located in an area of northerly wind shear and dry air, the National Hurricane Center forecast it to slowly intensify.

[4] After a burst in deep convection late on August 3, Hurricane Hunter data indicated flight level winds of 65 miles per hour (105 km/h).

Further organization continued and at 1200 UTC on August 5, Edouard attained its peak intensity with maximum sustained winds of 65 mph (100 km/h) and a minimum barometric pressure of 996 mbar (29.4 inHg).

Edouard then re-curved northwest over eastern Texas, before degenerating into a remnant low pressure area at 0600 UTC on August 6.

At 2100 UTC on August 3, a tropical storm watch was posted from Intracoastal City, Louisiana to Port O'Connor, Texas.

The tropical storm warning was extended to include the mouth of the Mississippi River to Port O'Connor at 1500 UTC on August 5.

[11] In Cameron Parish, Louisiana the Office of Emergency Preparedness ordered a mandatory evacuation, where Sheriff's deputies also erected roadblocks.

Along the coast, storm surge in Louisiana generally ran 4 to 5 feet (1.2 to 1.5 m) above normal, although a slightly higher tide was reported near Intracoastal City.

[12] A man fell overboard from a shrimp boat and died in rough seas from Edouard near the mouth of the Mississippi River.

Due to the high winds, falling trees and power lines left at least 300,000 customers in Southeastern Texas without electricity, most of them in Jefferson County.