Getty Images
Tornado or Emergency Warning Siren Starts
In the first three seconds of this clip an audible signal is heard which activates the siren. The siren is a modern storm warning system in a residential neighborhood and the clip could be used equally well for a tsunami or air raid...
Getty Images
Tornado Emergency Warning Siren Stops
This is a modern storm warning siren in a residential neighborhood which is stopping, signaling the end of the danger. Towards the end of the clip, other sirens can be heard in the background.
Curated Video
U.S. Braces For Dangerous Blast Of Cold, Wind And Snow
Some places in the northern U.S. could see wind chills approaching 70 degrees below zero. Even warm-weather states are preparing for the worst.
NOAA
Noaa: Estuary Education: Extreme Weather: Path of Destruction
Learn how the National Weather Service uses technology to forecast extreme weather events and issue warnings to citizens in the path of destruction. [9:14]