Hereâs why I chose the NASM certification! Did you need any sort of background related to the field going into the program? Nope, you just need to make sure that you have a current CPR and AED certification before you take the exam. How long does your certification last before you have to renew it?
Tornado Warning. This is issued when a tornado is indicated by the WSR-88D radar or sighted by spotters; therefore, people in the affected area should seek safe shelter immediately. They can be issued without a Tornado Watch being already in effect. They are usually issued for a duration of around 30 minutes.
May 18, 2013 | Voltage | Weather Radios. The difference between a tornado warning and tornado watch is more than just the colors that represent them in the corner of a television screen. Knowing when the possibility of a tornado exists and when one is imminent will help keep you and your family safer.