Tornadoes are hitting in clusters more often

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Tornadoes Are Hitting In Clusters More Often

Although a lot of devastating tornadoes have been reported recently, about the same number of twisters have happened during all of the past few decades.

According to a study from the National Oceanic and Atmospheric Administration, tornadoes in America are grouping together to cause more damage.

The devastation that a tornado leaves in its path is immense, and while it appears that many more have occurred recently, the annual number of larger twisters today is almost the same as the 1950's.

What has changed, according to a recent study from the National Oceanic and Atmospheric Administration, is that their overall daily frequency has decreased, but more are forming on the same day.

WESSINGTON SPRINGS - South Dakota Tornados
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Tornadoes are hitting in clusters more often
This photo provided by Connor McCrorey shows a tornado near Alpena, S.D., about 15 miles southwest of Wessignton Springs, on Wednesday, June 18, 2014. National Weather Service meteorologist Todd Heitkamp confirmed that a tornado touched near Alpena on Wednesday, as well as nearby in towns Woonsocket and Wessington Springs. (AP Photo/, Connor McCrorey)
This photo provided by KDLT shows damaged buildings in Wessington Springs, S.D., on Wednesday, June 18, 2014. A tornado hit Wessington Springs Wednesday, damaging homes and businesses and injuring at least one person, according to the National Weather Service and a hospital spokeswoman. (AP Photo/KDLT, Brian Kirk) MANDATORY CREDIT
Map locates Wessington Springs, South Dakota
Tornado strikes South Dakota town, razing dozens of homes; 2 hurt |
WATCH: A #tornado in the middle of nowhere can actually be quite beautiful: #sdwx
Pls keep them in your Dua's, there is said to be a tornado ripping through south Dakota.
Tornado damage in Wessington Springs, #SouthDakota. State Officials are responding. State EOC is activated. #SDwx
Wessington Springs, SD Major damage.. everyone accounted for as of right now.
Wednesday tornados leaves path of destruction in South Dakota
Photo gallery:Tornado rips through South Dakota town. Thankfully, no deaths / serious injuries
More #severe #storms in the Central US on Wednesday, including a tornado in South Dakota:
Tornado in South Dakota rips "through heart of town" (photo: Joe Ahlquist, Argus Leader/AP):
Watch: a tornado tears through a small town in South Dakota
DEVELOPING: Everyone is accounted for after tornado rips through a South Dakota town #7News
WOW! Tornado Wednesday evening near Alpena, South Dakota. Photo: Shalyn Phillips. #Tornado #SDwx
People reportedly trapped after South Dakota tornado. Wire:
Rope #tornado near Woonsocket, South Dakota this evening by @DjDerve.
Very very bad situation here IN SD
Multiple tornado warnings in South Dakota right now, confirmed #tornado!
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Tornado warned storm in South Dakota north of Belle Fourche. @JWSevereWeather @NWSRapidCity #sdwx
Tornado debris signature evident on radar south of Humboldt (west of Sioux Falls) in South Dakota.

The researchers excluded the weakest tornadoes, known as EF0, and concentrated on those rated EF1 to EF5 in strength. 1973 for example, saw 187 days of tornadoes, while 2011 only experienced 110 days, but with more than 30 occurring on 9 of those days.

Today, approximately 20 percent of twisters in the U.S. occur on just 3 days of the year. Harold Brooks, a research meteorologist with National Oceanic and Atmospheric Administration's National Severe Storms Laboratory in Norman, Oklahoma is quoted as saying:

"Concentrating tornado damage on fewer days, but increasing the total damage on those days, has implications for people who respond, such as emergency managers and insurance interests."

Experts still aren't sure what is causing the change in tornado behavior, but some speculate that climate change might be playing a role.

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