What kind of signals do you get without the rain? You might need a repoint. Even in the "wet" state I live in, I rarely get any drops of signal.
The weather in the ATL metro area was unuusal for sure.
The storms in the area were due to a stalled front which caused "training". This is when rain systems continue in the same places for extended periods. It happens.
Fortunately heavy rains such as that are rare.