I would like to thank everyone for their interest in my question. Yes, I am in eastern El Paso County, Texas.
I had mistakenly believed that the larger S5 dish used the 3 visible LNBs to receive just the satellites at the 99, 101 and 103 positions. It would seem from your posts that one of those LNBs is a combination unit just like is used on the smaller S3 dish and the remaining 2 LNBs are for the 110 and 119 positions.
I have no great concern for duration of SD signals during a storm. Summer thunderstorms tend to be brief here. What may be of consideration would be speculation on the future use of those satellites at 110 and 119 after all SD is terminated. This is all a very interesting field of study.