From Sean Bellafiore:
Mostly clear skies remain in place as morning lows fall into the lower and middle 30s. The near-freezing start to the day will help keep temperatures Saturday afternoon in the middle 50s under mostly clear skies early which should become more overcast throughout the day. An upper-level area of low pressure will move through Central Texas Saturday and will likely spark scattered after 2 PM. All areas of Central Texas may see at least some rain Saturday with rain chances between 60% near and west of Highway 281 and 80% near I-45.
Scattered rain from Saturday afternoon should continue through the evening Saturday with the best chances of precipitation near and east of I-35. During the evening, a few rumbles of thunder can be expected and pockets of moderate to heavy rain may also fall near and east of I-35. The upper-level storm system quickly moves out of Central Texas and rain will clear the area by sunrise Sunday. Rainfall totals Saturday and Saturday night will generally be near a half inch, but areas east of I-35 can see as much as an inch and a half of rain. As skies gradually clear Sunday, temperatures will again shoot above average in the middle and upper 60s.
Temperatures will remain in the middle and upper 60s through much of next week with only a low chance of an isolated shower on Monday. The bigger story is the arrival of a cold front late Thursday or early Friday. This cold front will bring very cold air to Central Texas Friday through the upcoming holiday weekend, potentially lasting through Christmas. Currently, our forecast calls for a high temperature in the middle 40s Friday, however depending on the speed of the cold front, temperatures Friday may actually be colder, potentially falling through the 30s during the day under overcast skies.
While we're confident that cold air is going to move into our area, there remain a lot of questions about the type of weather we may see. Forecast models continue to indicate a chance for precipitation between Friday and Christmas Day, but it's currently impossible to tell when precipitation may start, what type of precipitation may fall, and when precipitation may move out. As of now, precipitation chances are near 30% Friday, however this will change over the coming days.