How real is the rain shield over Austin?

AUSTIN (KXAN) -- Is there an actual rain shield over Austin? Some people think there is. Some people who live outside of Austin will swear there is something that happens when rain is approaching that makes it bypass their locale.
Our weather office receives emails about this after rain events asking, "Why didn't my city get rain when it looked so promising?"It can be frustrating.That frustration is made more when rain and storms coming out of the Hill Country get weaker moving into our metro co