By Will Dunham WASHINGTON (Reuters) - Tornadoes in the United States are increasingly coming in swarms rather than as isolated twisters, according to a study by U.S. government meteorologists published on Thursday that illustrates another trend toward extreme weather emerging in recent years. Looking at tornado activity over the past six decades, the study in the journal Science found the total number of tornadoes annually remaining rather steady, averaging 495. Since the 1970s, there have been fewer days with tornadoes but plenty more days with many of them, sometimes dozens or more. On the list of the 10 single days with the most tornadoes since 1954, eight have occurred since 1999, including five since 2011. That year alone had days with 115, 73, 53 and 52 twisters. The meteorologist who led the study, Harold Brooks of the U.S. National Oceanic and Atmospheric Administration's National Severe Storms Laboratory in Norman, Oklahoma, said emergency management agencies and insurers should be prepared to deal more often with days with lots of tornado damage. The study analyzed the official U.S. tornado database for the six-decade period ending last year, excluding twisters below Category F1, with wind speeds of 73-112 mph (117-180 kph), on the Enhanced Fujita Tornado Intensity Scale. Some experts have blamed weather intensity seen in recent years on global climate change they attribute to human activities. This study did not, however, offer a conclusion as to a cause. "Knowing that the climate now has changed from that of the 1970s makes for a circumstantial argument in favor of a changing climate playing at least some role in the tornado changes," said meteorologist Patrick Marsh of NOAA's Storm Prediction Center. "There are indications that heavy rainfall events are occurring with greater frequency globally, and given a warmer climate, this makes sense," added Storm Prediction Center meteorologist Greg Carbin. But "any trend in tornado events is much more difficult to discern," Carbin added. The average number of days annually with at least 20 tornadoes has more than doubled since the 1970s to upwards of five days per year in the past decade. For days with at least 30 tornadoes, there has been an average of three per year in the past decade, compared to 0.6 days per year in the 1970s. Records for both the most and fewest tornadoes over a 12-month period have come in the past five years, with 1,050 from June 2010 to May 2011 and 236 tornadoes from May 2012 to April 2013. May is the month with the most tornado activity, followed by June and April. Tornadoes, rapidly spinning columns of air usually spawned by rotating thunderstorms, can be among the most violent weather events. They have been reported on every continent except Antarctica but most often hit a U.S. region covering the Great Plains and parts of the Midwest and South. Tornadoes can cause extensive loss of life and property damage like the May 2011 twister in Joplin, Missouri, that killed about 160 people and wrecked thousands of homes. (Reporting by Will Dunham, editing by G Crosse)
Our goal is to create a safe and engaging place for users to connect over interests and passions. In order to improve our community experience, we are temporarily suspending article commenting
- NBC Sports Chicago
Simone Biles surprised everyone when she pulled out of the gymnastics team final after struggling to land a vault, but for a short time, the world only knew her departure was due to a medical issue.
In an exclusive excerpt from Mena Suvari’s memoir, ‘The Great Peace,’ the ‘American Pie’ actor battles a meth addiction after finding fame at a young age.
- The Week
The 'frightening' phenomenon Simone Biles experienced before her Olympics withdrawal
😬 😬 😬
- The Daily Beast
It was a simple enough question from The View moderator Whoopi Goldberg to her co-host Meghan McCain towards the end of a segment on Wednesday morning about the gut-wrenching January 6 hearings in Congress. It did not receive a simple answer.“Meghan, these cops were protecting Republican and Democratic officials,” Goldberg said. “Why isn’t this a galvanizing moment for everyone? Is it really about just winning? Or have we lost something?”McCain, who is leaving The View at the end of this week, b
The Bennifer tour makes its way to Nerano, Italy.
- Yahoo Canada Style
"There's literally nothing wrong with this outfit."
- Business Insider
CDC: Color-coded map shows where Americans need to wear masks again, and where you can go maskless, outside of schools
Vaccinated people can still spread the Delta variant, which is one of the biggest reasons masks are being recommended indoors again.
- NBC News
First Read is your briefing from "Meet the Press" and the NBC Political Unit on the day's most important political stories and why they matter.
April Love Geary is here to remind us that we are not going to shame other women in 2021, right? Right! After the model, and mom-of-three, posted a pretty spectacular butt shot on her Instagram account on Sunday, there was, of course, someone who had no self-control and just had to send her a nasty […]
- The Wrap
Olympic Judo competitor Saeid Mollaei shouted out Israel after winning the silver medal in the men’s 81kg Judo event, a nod to his difficult past and the obstacles he overcame to even be able to compete in this year’s Tokyo Olympics. “Thank you to Israel for all the good energy -– this medal is dedicated to you as well and I hope Israeli is happy with this victory, todah,” Mollaei told Israeli news outlet Channel 5 Sports after winning the silver medal. Mollaei is originally from Iran, where he
- LA Times
The Times TV team discusses watching an often deflating, thoroughly chaotic Olympics — and why NBC's approach to televising it is part of the problem.
An Iranian athlete left his country after being told to lose on purpose, won silver at the Olympics for Mongolia, and dedicated the medal to Israel
Saeid Mollaei is from Iran but is representing Mongolia at the Tokyo Olympics. After winning silver in judo, he dedicated his medal to Israel.
- Warriors Wire
The Warriors are reportedly exploring trade packages to move up in the 2021 NBA draft to target Gonzaga's Jalen Suggs.
- In The Know
This sweet footage went so viral, even Kevin Bacon commented on it! The post Fiercely protective ‘nanny dog’ won’t let baby climb the stairs: ‘We don’t deserve dogs’ appeared first on In The Know.
- Business Insider
Police officer responds to GOP claims that Capitol rioters were tourists: 'If that's what American tourists are like, I can see why foreign countries don't like American tourists'
Officer Daniel Hodges referred to insurrectionists as "terrorists" and defended his remarks by reading the definition of domestic terrorism under US law.
"This broke my focus and that problem impacted my time," said Hungary's Kristof Milak.
More than 97% of hospitalized COVID-19 patients are unvaccinated, once again stressing healthcare systems.
- Associated Press
Officials at Fuji International Speedway apologized to the Dutch team after world time trial champion Anna van der Breggen was pulled from her bike by security during a recon of the Olympic course for Wednesday's race against the clock. The guard apparently did not know that van der Breggen was a competing athlete.
- NBC Sports
This trade could work well for both teams.