HARLINGEN, Texas (ValleyCentral) — A tropical storm warning is in effect for parts of the Rio Grande Valley. The warning covers Cameron, southern Hidalgo and Willacy counties.

The National Hurricane Center is tracking a developing tropical storm in the southwestern Gulf of Mexico. It is expected to become a tropical storm overnight toward dawn Saturday morning.

Landfall of this system is expected around 7pm, Saturday, just south of Matamoros. This track will give the Valley a good chance to see heavy rains and strong winds near 50 mph. Rainfall amounts may total 2 to 4 inches with some isolated heavier amounts possible.

Heavy rain and gusty wind may begin as early as 2pm, Saturday.

We urge everyone to stay up to speed on the direction, speed and strength of this developing system.

Download our Valley Storm Team app in the Apple App Store or Google Play for the latest weather forecasts.