North Texas will probably end October 2013 on a stormy note. A slow-moving upper level trough will cause pressure falls along the front range of the Rockies while surface high pressure remains anchored over the mid-Atlantic states. As the pressure difference between these two systems increases, winds in the Metroplex will become gusty Tuesday and Wednesday.
The air flow will be from the south, and a rich tap of Gulf moisture will interact with the upper trough and cold front, bringing the potential for heavy rainfall and possibly a few severe storms Wednesday into Thursday morning.
There is considerable uncertainty on how much (if any) severe weather north Texas will get, because there could be showers ongoing Wednesday morning that would limit heating during the day, and the geometry of the front and upper level system may vary from expected positions, also impacting this potential.
However, it’s more certain the Dallas area will get some significant rainfall which is good news. It also appears that things will settle down just in time for a dry Halloween night.