Rochester MN Emergency Management

Tornado - Signs of an Approaching Storm

Some tornadoes strike rapidly, without time for a tornado warning, and sometimes without a thunderstorm in the vicinity. When you are watching for rapidly emerging tornadoes, it is important to know that you cannot depend on seeing a funnel: clouds or rain may block your view. The following weather signs may mean that a tornado is approaching:

A dark or green-colored sky.
A large, dark, low-lying cloud.
Large hail.
A loud roar that sounds like a freight train.
If you notice any of these weather conditions, take cover immediately, and keep tuned to local radio and TV stations or to a NOAA weather radio.

Rochester MN Emergency Management page for RochesterMN Emergency Management