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.
What to do in event of tornado watch, warning. Editor's note: The following is advice from CNN Meteorologist Sean Morris on steps you can take when a tornado watch or a tornado warning is issued in your area. A tornado watch means that tornadoes, high winds, and hail are possible in the watch area. When a watch is issued in your area, keep abreast of the latest information by monitoring television, radio, and NOAA weather radio.