Yuma, AZ to Detroit, MI in April - Tornado Risk

Try Verizon... yes they are PITA to deal with and not cheap but they have the best coverage.

Rarely and only for very brief periods in our 2 months, 22 states, 7,600 mile trip did we not have decent cell coverage. AM radio is another universally available asset when it comes to getting current weather info and forecasts. No reason to travel anywhere in the US without current weather information.

:C