I live in Washington State, you may have heard a bit about our rain, so my Sirio Tornado has 3m tape (sticky waterproof and then wrapped with electrical) at each joint and was put up as winter was starting. The instructions do not say to do this but I saw a few posts on YouTube and around the net and took the extra 15 minutes when constructing it.
From Western WA, I have worked Japan, Brazil and Australia when conditions are right and have worked all states.
I have a mobile Sirio 5000 with mag mount that has been around for 6 years now, tested over 100MPH, and worked the East coast at 70MPH on I-5! It is also quieter than my 102" Hustler that I have as a "sure thing" back up.
Just sharing my experience.