We don't go anywhere without our WX ALERT radios... They sound off the alert tones when bad weather is in the area. Mine are Radio Shack version but there are many different models on the market to chose from.
Mine is mounted inside the trailer and powered by 12VDC using one of those step down DC adapters. It runs off a 9VDC internal battery which I removed and run off of the external DC connector stepped down to 9VDC. It is always ON...
The high end WX RADIOS have setting for specific areas which would not work well if you are moving around the country alot. I like the more SIMPLE VERSION WX Radio that picks up everything.
There is probably a CELL PHONE app for this as well. Never looked into that
ADDED NOTE: My 2010 Truck came with SIRIUS RADIO and it has been outstanding for following bad weather when in travel mode. Lots of tools to use to keep safe.
Roy Ken