The weather looks decidedly colder in the wake of a front.  Acording to Space City Weather ( my favorite Weather source) they say " to expect temperatures on Sunday morning to be in the upper 30s to lower 40s in downtown Houston. However, it will feel colder if winds are, as expected, out of the North and gusty. The apparent temperature may be down closer to freezing level. Conditions will probably not warm up a whole lot during the morning with additional cold air advection from the north, even if skies are clearing. The good news is that any rain will very likely have exited the area."   If you are running or supporting a runner, dress warm and be prepared to get a bit wet.