Tornado, Tornado Warning, Flash Flood Warning: What's the Difference?
What is a tornado?
A tornado is a violently rotating column of air that extends from the base of a thunderstorm cloud to the ground. Tornadoes are often referred to as twisters or cyclones. They are one of the most destructive forces of nature, capable of causing widespread damage and loss of life.
What is a tornado warning?
A tornado warning is issued by the National Weather Service (NWS) when a tornado has been spotted or is indicated by radar. A tornado warning means that a tornado is imminent or already occurring and that people in the affected area should take immediate shelter.
What is a flash flood warning?
A flash flood warning is issued by the NWS when there is an imminent or ongoing threat of flash flooding. Flash flooding is a sudden, rapid flooding of low-lying areas caused by heavy rainfall. Flash floods can be extremely dangerous, as they can quickly overwhelm roads and bridges, making them impassable.
What's the difference between a tornado warning and a flash flood warning?
The main difference between a tornado warning and a flash flood warning is the type of hazard that is being warned about. A tornado warning is issued when there is an imminent or ongoing threat of a tornado, while a flash flood warning is issued when there is an imminent or ongoing threat of flash flooding.
Other key differences between tornado warnings and flash flood warnings include:
- Lead time: Tornado warnings typically have a lead time of several minutes, while flash flood warnings may only have a lead time of a few seconds.
- Areas affected: Tornadoes can affect small or large areas, while flash floods typically affect low-lying areas.
- Safety precautions: When a tornado warning is issued, people should seek shelter in a sturdy building. When a flash flood warning is issued, people should move to higher ground and avoid driving through flooded areas.
What should you do if you are under a tornado warning or a flash flood warning?
If you are under a tornado warning, you should:
- Seek shelter in a sturdy building.
- Go to the lowest level of the building.
- Stay away from windows.
- Cover your head and neck with a blanket or pillow.
If you are under a flash flood warning, you should:
- Move to higher ground.
- Avoid driving through flooded areas.
- Stay informed about the flood situation by listening to the radio or television.
For more information on tornadoes and flash floods, please visit the National Weather Service website.
