Only your local officials can issue evacuation orders.
Only the National Weather Service can make offical forecasts and issue Watches, Warnings and Advisories.
Much of everything else you see on TV weather is entertainment-based. Private weather organizations CAN say what they think and relay government information, BUT only government sources make decisions that affect what you should do in an emergency.
If You Have A NOAA Weather Radio, Make Sure It Has Fresh Batteries! Tornadoes Spawned By Tropical Systems Can Strike With Little or No Warning, So Keep Your Eyes AND Ears Open! If you DON'T have one, GET one!