A high-pressure system over the eastern United States is expected to impact the Rio Grande Valley. This system is currently driving an intense heat wave and will brush against the valley, stirring up atmospheric moisture.

As the moisture meets the sea breeze, there is a possibility of coastal showers. However, these showers are expected to be widely scattered and limited in coverage.

Further details on the forecast for the Fourth of July weekend are available from ValleyCentral, providing a more in-depth look at what residents in the McAllen area can expect.