An isolated tornado cannot be ruled out. A Severe Thunderstorm Warning means radar has detected, or a report has indicated, a severe thunderstorm producing large hail or damaging winds is in progress or is imminent. A Tornado Watch means conditions are favorable for tornadoes.

What is an isolated tornado?

An isolated tornado is a tornado that is likely to crop up by itself. Many times, tornadoes are formed during violent thunderstorms.

How long do isolated tornadoes last?

They can last from several seconds to more than an hour, but most don't exceed 10 minutes. Most tornadoes travel from the southwest to northeast with an average speed of 30 mph.