A tropical storm watch has been extended as Tropical Storm Don moves across the Gulf of Mexico toward southeastern Texas, where it's expected to make landfall Friday.

Tropical Storm Don is forecast to hit the Texas coast late Friday.

A tropical storm watch is now in effect from the mouth of the Rio Grande  northward to west of San Luis Pass.

The National Hurricane Center in Miami says Don's maximum sustained winds early Thursday are near 40 mph with some strengthening possible.

The storm is centered about 635 miles east-southeast of Corpus Christi, Texas, and is moving west-northwest near 10 mph.

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