Weak high pressure over the Coastal Bend tonight and Monday will mean a cool start to the work week, but the high moves into the Gulf of Mexico by midweek and returns warmth and moisture.
Gulf humidity pooling ahead of a Friday cold front will mean only isolated showers, with weak upper air support. A ridge in the upper air over South Texas early in the week will bring low humidity and a slow warming trend, with afternoon temperatures climbing into the middle to upper 70s by midweek.
A low pressure area will deepen lee of the Rockies Thursday ahead of an upper level low and its associated cold front. That front will move through South Texas midday Friday, but its parent upper level low will be too far north to generate enough dynamics for significant rainfall potential.
Following the front, skies clear and temperatures cool through the weekend. Expect highs in the 60s and 70s, with lows in the 40s and 50s, except lower 60s Thursday night.