With the weekend coming up, and if you're a little handy, you can find where your cable enters the house.
Look for it's grounding block and check its connections, and trace the ground wire to see if it has a proper connection to a ground rod or water pipe.
The integrity of outdoor connections degrade over time and need to be cleaned and re-tightened.
Adding an Anti-oxidant will help protect any outdoor connections:
Ideal NOALOX 4 oz. Anti-Oxidant Compound 30-026 at The Home Depot