That reminds me of the last big storm here that ripped parts of roofs off and snapped power poles in half and knocked out the power for days, etc. I was in the living room at the time, the sky was mostly sunny if I recall, and had no warning.Then there is the “Reverse 911” service to consider - where the local safety office uses landlines to call you to advise you of a nearby danger.
My cell phone wasn't near enough to hear it, the landline didn't ring either for any alert, but an extra cell phone I use as a media device, it has no cell carrier service plan, it popped up a big danger warning alert.
I had never seen that before so figured maybe it's serious. Then I squinted into the distance and saw the darkness coming fast and blotting out the sky like it's a disaster movie or supernatural horror movie. In the basement two minutes later, the howling winds sounded one step short of a tornado. Glad I had the no-service cell phone around.