what is the difference between tornado watch and warning
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What is the difference between a Tornado Watch and a Tornado Warning issued by the National Weather Service?
Tornado Watch: Be Prepared! Tornadoes are possible in and near the watch area. Review and discuss your emergency plans and check supplies and your safe room. Be ready to act quickly if a warning is issued or you suspect a tornado is approaching. Acting early helps to save lives! Watches are issued by the Storm Prediction Center for counties where tornadoes may occur. The watch area is typically large, covering numerous counties or even states.
Tornado Warning: Take Action! A tornado has been sighted or indicated by weather radar. There is imminent danger to life and property. Move to an interior room on the lowest floor of a sturdy building. Avoid windows. If in a mobile home, a vehicle, or outdoors, move to the closest substantial shelter and protect yourself from flying debris. Warnings are issued by your local forecast office. Warnings typically encompass a much smaller area (around the size of a city or small county) that may be impacted by a tornado identified by a forecaster on radar or by a trained spotter/law enforcement who is watching the storm.What is the difference between a tornado watch and warning?: University of Illinois Extension
Tornadoes can form in a few minutes and dissipate just as quickly. However, the conditions that may create a tornado and other severe weather can be seen hours in advance giving forecasters and the public the chance to be vigilant.
What is the difference between a tornado watch and warning?
Posted by Duane Friend June 25, 2021
Tornadoes can form in a few minutes and dissipate just as quickly. However, the conditions that may create a tornado and other severe weather can be seen hours in advance giving forecasters and the public the chance to be vigilant.
Tornado Watch vs. Warning
Watch: Conditions are right for a future severe thunderstorm or tornado. Watches are issued hours in advance.Warning: A severe thunderstorm or tornado has been sighted in person or by radar. Seek shelter.
Illustrations by Matt Wiley and Ben Arthur.
What is a tornado or severe storm watch?
A watch means conditions could lead to severe weather and people need to be aware that severe storms or a tornado could form at any time during the watch period.
Tornadoes need a few basic weather conditions to develop: warm, moist air, the ability for that air to rise thousands of feet in the atmosphere, and winds moving at different speeds or directions with height.Who issues watches?
A watch is based on many observations of the atmosphere over multiple states, but only issued for affected counties in a particular state or states. The National Oceanic Atmospheric Administration and the National Weather Service (NWS) Severe Storm Prediction Center will issue a Severe Thunderstorm or Tornado Watch several hours ahead of when favorable conditions occur.
During the watch period, storm observers are activated to observe changing weather conditions.
What is a tornado or severe storm warning?
While watches can be issued hours in advance, warnings have much less time to work with. The average lead time from a tornado warning being issued and when it may strike is 13 minutes.
A warning is issued under two conditions:A weather observer reports sighting a severe storm or tornado.
Weather radar indicates a severe storm or tornado is likely happening.
Storm observers are trained to look for specific elements with tornadoes, such as cloud rotation. Sometimes the eye and brain can be deceived by what is seen.Weather radar operators are also looking for rotation in a small part of the storm, called a hook echo. Since the radar can show wind direction within a storm, if the air is seen moving in one direction next to air moving in the opposite direction, a tornado may be forming or is already on the ground.When a warning is issued, seek shelter
Research shows that many people don’t take heed when a warning is used, instead they wait until they can see a severe storm or tornado with their own eyes. Because of this type of research, the National Weather Service revised their advice, especially for large very dangerous tornadoes and severe storms.
Follow their advice:Don’t try to see the tornado, don’t think it’s safe to wait until the last minute.
Have a safe place in mind and useable as part of your home severe weather plan, and go there.
Use a weather app for your smartphone with automatic alerts.
Keep you, your family, and pets safe.
Find more information on preparing for severe weather on the Illinois Extension Disaster Preparedness website.
Research on tornado and storm prediction
Data from observed storms have been used to simulate tornadoes by computer, such as with the Blue Waters supercomputer at University of Illinois. The tricky part is it’s hard to have that much information ahead of time and conditions are constantly changing.
Getting measurements of winds, moisture and other weather variables for thousands of feet of atmosphere cannot be done over large areas in real-time, yet. And the amount of data that would create requires a supercomputer to chug through it.
Source : extension.illinois.edu
Tornado watch vs warning: What to do when you see alert messages
Tornado watches and warnings have different purposes, and you should react to each differently, AccuWeather explains.
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Tornado watch vs warning: What to do when you see alert messages
AccuWeather explains the difference between a Tornado Watch and a Tornado Warning
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AccuWeather explains the difference between a tornado watch and a tornado warning.
Tornado watches and tornado warnings have different purposes, and you should react to each differently, AccuWeather explains.
A tornado watch is typically issued hours in advance by NOAA's Storm Prediction Center (SPC). It means that conditions are ideal for a tornado to form. A watch will not necessarily result in severe weather, AccuWeather explains.
"A watch is issued when conditions are favorable, for example, either for a severe thunderstorm or tornadoes," AccuWeather.com Senior Meteorologist Dan Kottlowski said. "It doesn't mean severe weather is imminent."
If there is a watch in your area, you should keep an eye on weather alerts and be prepared to act. Make sure you know ahead of time what to do if a tornado hits.
While a watch covers a broad region, a warning is issued by a local National Weather Service meteorologist for a smaller area.
A warning means that either a tornado has been spotted or a radar has picked one up.
If you are in an area with a tornado warning, it's time to act immediately. Get to a safe space such as a storm shelter. If you don't have one, the best option is usually in the basement or the middle of a building, away from windows, preferably in an area with reinforced walls.
On rare occasions during significant events such as a tornado outbreak near a heavily populated area, a tornado emergency might be issued. The difference between a warning and an emergency has to do with how widespread the damage could be.
Just as with a tornado warning, those in the path of a tornado emergency should seek shelter and wait for authorities to say when it's safe to come back out.
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