|Rain, Rain Go Away?
Yes! Beautiful Weekend Upcoming after Possible Flooding
Perhaps the last of the true summer rains will continue into September 24th, as the combination of an upper level disturbance, a nearby stationary front, and channeling easterly flow of warm and humid air in the lowest levels of the atmosphere will maintain the threat for more heavy rains, especially near the coastal areas of the Lower Rio Grande Valley. Given radar and observed values of 3 to 5 inches in some spots since September 21st, an additional 1 to 3 inches or more may cause urban and poor drainage flooding during the overnight hours into the daytime on Wednesday; heavier rains could produce isolated pockets of more threatening flash floods. The additional storm totals could push the monthly rainfall close to the top 20 wettest Septembers at both Brownsville and Harlingen. While no great feat on its own, the three month totals since July 1st may well place each in the top 5 rankings since records have been kept. Residents of the Lower Rio Grande Valley should remain alert to the possibility of flooding, and stay tuned for possible advisories or warnings, through Wednesday the 24th.
At long last, the weather will cooperate with an approaching weekend to produce superb weather across Deep South Texas and the Lower Rio Grande Valley beginning Thursday, and continuing right through the weekend. Increasing northerly flow of drier air from the central Plains will shunt the deep moisture well south into Mexico, leaving sunny, pleasant days and clear, comfortable nights as the work week ends. High pressure at the surface, expected to set up shop across the western Lower Rio Grande Valley and Rio Grande Highlands, will maintain a light northerly flow across the region. After the summer swelter, mixed in with clouds, rain, and the occasional threat from tropical cyclones, the period from September 25th through 28th will be a treat, indeed! For persons planning outdoor activities, this is your weekend.