A weak tropical disturbance in the Gulf of Mexico has begun to bring rain and thundershowers to parts of the lower Rio Grande Valley Thursday morning.
An extensive low pressure trough is currently about 30 miles off the coast of South Padre Island and will continue to push west on Thursday bringing a deep layer of moisture into deep South Texas and trigger numerous showers and thunderstorms.
Shower activity will begin to shift westward Thursday afternoon as the trough moves west.
A 60-70 % chance exists Thursday, dropping slightly to 50-60 % Friday, before becoming scattered rain Saturday at 30%.
A slow moving system, there may be heavy pockets of rain that may cause pooling water on roadways.
Isolated pockets of wind gusts up to 50 mph are also possible.
Some areas could see as much as 2-4 inches over a 72-hour span.