Two cold fronts are forecast to pass through Deep South Texas this week. The first will slip past the RGV early tomorrow morning bringing in a wind shift and cooler air but not much in the way of rain. Overnight lows for your Wednesday wake up will drop to the upper 30's with clear skies.
Typical to the valley; conditions return to normal quickly with southeast winds and sunshine boosting temperatures back into the low 70's by Wednesday afternoon.
The second cold front will be a bit more substantial, it should slide south by afternoon on Thursday helping to drop temperatures late in the day.
The bad news comes in the form of a chilly, wet day on Friday. Overrunning moisture will kick up plenty of clouds and provide enough fuel for widely scattered, light showers on Friday making it an icky day.
The recovery will also take a bit longer with highs in the upper 50's Saturday and finally breaking out into the upper 60's by Sunday, any rain should end by early Saturday morning.