A broad area of low pressure is producing disorganized shower and thunderstorm activity over the Bay of Campeche (Mexico) and may affect the Rio Grande Valley later this week, according to the National Weather service in Brownsville.
This system is expected to inch slowly northwestward toward the northeastern coast of Mexico and could become a tropical cyclone before it moves inland into Mexico in a day or two. It has a 60% chance of formation over the next 48 hours.
An Air Force Reserve reconnaissance aircraft will investigate the disturbance Monday afternoon, if necessary. The NWS warns that interests along the Gulf coast of Mexico should monitor the progress of this system.
This system is expected to bring moderate to heavy rainfall for the Valley and deep South Texas through midweek. Chances increase Tuesday and Wednesday.
As for Monday, it will be another hot and humid day. Temperatures will feel like they are in the triple digits. There is a 20% to 30% chance for an isolated shower and/or thunderstorm.
Easterly winds are expected to increase by this afternoon and will be sustained between 15 to 20 mph.
McAllen and Brownsville will be 95 and 93, respectively. South Padre Island’s high is expected to be 87.