Afternoon Heat and Humidity Linger, but Rain Chances Begin to Improve

A large upper level ridge that has sent afternoon temperatures into the triple digits over the Crossroads all week long is now beginning to shift to the northeast, and that change will mean at least a chance for rain. The ridge has been preventing showers and storms from developing in the steamy tropical air, but its displacement to the East Coast by early next week will allow showers and thunderstorms. Precipitation will be isolated over the weekend, but increase to scattered midweek as a weak tropical wave migrates westward from the Gulf of Mexico. While it is too soon for reliable forecast rainfall totals, anything is welcome in the parched South Texas grasslands.