As a update on this issue core issue... I replaced the plug wires and distributor cap and after a couple rainy days I think I can safely say (knock on wood) that the problem is fixed. I think the cause is as follows.
The metal connect that attaches to the spark plug broke off at the 45 degree bend in the spark plug wire on a couple of the wires. The wires functioned fine when dry but with the addition of the some water and the age of the wires (100K miles) it became easier for the spark to arc to the engine block than it was for the spark to travel through to the spark plug. In addition, I found a healthy amount of corrosion on the terminals inside the distributor cap (I think it was the Jeeps original dist. cap).

So liquid exacerbated the issues of: The aged plug wires, breaks in the wires, and corrosion on the distributor cap. Nonetheless, problem solves. Thanks for everyone's input and advise.