Tropical Storm Karen

Karen, once feared to hit the U.S. Gulf Coast as a hurricane, has stalled out and weakened into a tropical depression. The National Weather Service says the storm is "drifting" at 2 mph, moving toward Louisiana's southeastern edge. As of early Sunday morning, it was about 165 miles west-southwest of the mouth of the Mississippi River.

Tropical Storm Karen continued losing strength Saturday as it headed toward the central Gulf Coast, but forecasters were still expecting it to bring significant rain and potential flooding to low-lying areas.

The National Hurricane Center reported at 2 a.m. Saturday that Karen's maximum sustained winds had dropped to 40 mph, making it a weak tropical storm. The storm was moving west-northwest at 10 mph to 15 mph.

Forecasters expect the center of Karen to be near the southeast Louisiana coast on Saturday night, when they say there is a slight chance of strengthening.

Newly formed Tropical Storm Karen, which could reach hurricane strength by Friday, is expected to make landfall on the U.S. Gulf Coast sometime over the weekend.

The National Hurricane Center in Miami says the late-season storm formed Thursday morning about 485 miles south of the Mississippi Delta, with maximum sustained winds of 65 mph. It was moving north-northwest at 12 mph, but was expected to speed up.

Forecasters say it will make landfall in the U.S. either Saturday or Sunday.