18 Tornadoes Reported in 5 States Monday
Extreme weather spawned 18 tornadoes across five states Monday, USA Today reported. Tornadoes were reported in Texas, Oklahoma, Kansas, Missouri and Arizona, but were not as dangerous as forecasters had initially feared, the Associated Press reported.
The National Weather Service's Storm Prediction Center (SPC) had raised the probability of tornadoes in northwest Texas and central Oklahoma from 35 to 45 percent Monday afternoon. The last time chances were that high was April 14, 2012, when 122 tornadoes killed six people in Kansas and Oklahoma, according to USA Today.
"I'd certainly label this the 'nightmare scenario,'" meteorologist Mike Smith tweeted of Monday's forecast, as USA Today reported.
The latest forecast from SPC has increased the tornado probabilities from 30% to 45% from northwest Texas into central Oklahoma.— NWS SPC (@NWSSPC) May 20, 2019
The last time a 45% tornado outlook was issued was during the Tornado Outbreak in Oklahoma and Kansas on 14 April 2012.https://t.co/DFvb0sQlo3 pic.twitter.com/lTfcEkv5hk
All of Oklahoma City was included in the "high-risk" area, and most of the largest school systems in the center of the state closed Monday, including the University of Oklahoma campus. It appeared to be the first time such a mass closure had taken place in central Oklahoma ahead of an extreme weather event, the Weather Underground reported.
"This event should result in a significant threat to life and property," the SPC said.
Luckily, the tornadoes touched down in remote areas and no injuries were reported, according to the Associated Press.
One tornado struck Mangum, Oklahoma, damaging some roofs and destroying the high school barn, though the animals survived.
"The pigs are walking around wondering what happened to their house," Greer County emergency management director Glynadee Edwards told the Associated Press.
Another tornado damaged a home and destroyed a barn near Lucien, Oklahoma.
The storm system produced golf-ball sized hail, and raised the risk of flooding, especially in parts of Oklahoma, Kansas and Missouri, AccuWeather reported. The risk of tornadoes and flooding continued into Tuesday, but was less severe, according to USA Today.
The outbreak comes during a stormy month for the South-Central U.S. At least 50 tornadoes were reported in the central and southern plains last week and into the weekend, according to AccuWeather. And more storms are expected in the region later this month.
"It looks like there is no end in sight to this very active pattern of severe weather into the end of May," AccuWeather extreme meteorologist Reed Timmer said, as USA Today reported.
The relationship between tornado outbreaks and climate change is not yet fully understood.
The science of how climate change is affecting tornadoes is still evolving, but there's reason to believe major outbreak days (like today could be) are getting worse.— Eric Holthaus (@EricHolthaus) May 20, 2019
It's certain that extreme rainfall events are becoming more intense as the world warms.https://t.co/w35cWMzq2P
A 2016 study co-authored by Columbia University professor Michael Tippett found that tornado outbreaks (systems that spawn multiple tornadoes in an area within hours or days) were becoming more extreme. An outbreak with a 20 percent chance of occurring in a given year would have produced 40 tornadoes in 1965, but 80 in 2015. However, the researchers found that the cause of those outbreaks was the opposite of what they would have expected if climate change were to blame, as Climate Central explained:
Why some storms produce tornadoes but others don't still isn't fully understood, but two components are essential: an unstable atmosphere, which promotes the convection that drives severe storms, and wind shear, or changes in wind speed and direction at different levels of the atmosphere, which helps create a tornado's rotation.
Climate models have suggested that instability should increase with warming, because of the excess water vapor a warmer atmosphere can hold, but that wind shear should decrease. The increase in instability was seen to win out, though, suggesting it could be behind the tornado trends.
But when Tippett and his team looked at trends in particular atmospheric measures of these two factors, "we found the opposite," he said: Wind shear was behind the trends in extreme outbreaks.
National Severe Storms Laboratory senior scientist Harold Brooks, who was not involved with the study, said more research needed to be done to determine if climate change were not responsible, or if scientists simply did not yet fully understand how it impacts storm systems. If climate change is to blame, then the increase in the severity of tornado outbreaks will continue. However, if the cause is related to a natural cycle, the trend could eventually reverse, Climate Central reported.
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An All-Rounder<p>Vitamin D levels in the body rise and fall according to sun exposure. If sufficient UV rays reach the skin, the body is able to produce the vitamin itself. However, the human body only derives an estimated 10 to 20 percent of its daily requirement from food.</p><p>The vitamin D that we synthesize from sunlight or food is not biologically active at first. Before the kidneys can produce the biologically active form of the vitamin, known as calcitriol, and release it into the blood, some metabolic processes must take place beforehand.</p><p>In addition, many organs have receptors to which the precursor of calcitriol binds. Further, this substance is also present in blood.</p><p>From this precursor, the organs then produce calcitriol themselves, which the body then uses for countless other processes in the body. This form of vitamin D thus regulates insulin secretion, inhibits tumor growth, and promotes the formation of red blood cells as well as the survival and activity of macrophages, which are important for the <a href="https://www.mdpi.com/2072-6643/5/7/2502/htm" target="_blank">immune system.</a></p>
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Association Versus Intervention Studies<p>Many studies on the vitamin are association or observational studies. "By definition, these studies cannot prove the causal relationship, but only point to mere correlations," said Fassnacht. The physician tries to illustrate this with an example:</p><p>"Imagine two groups of 80-year-olds. One group is spry, active and does sports. If you compare them with another group living in nursing homes, the difference in vitamin D levels will be dramatic. Life expectancy would also be extremely different."</p><p>But to try to explain the difference in fitness by vitamin D status alone is far too simplistic. "Vitamin D levels are a good measure of how sick someone is. But not more," says Fassnacht. </p><p>According to Fassnacht, none of the intervention studies carried out to date -- that specifically examined the effect of vitamin D on various diseases -- has been able to confirm the previous association and laboratory studies or the presumed positive effect of vitamin D.</p>
Further Research Is Needed<p>"If a coronavirus infection is suspected, it is therefore absolutely necessary to check the vitamin D status and quickly correct any possible deficit," said the recommendation of the paper published by the University of Hohenheim.</p><p>"Studies are underway to see whether vitamin D helps in COVID-19 infection, but I personally do not believe that this is really the case," says endocrinologist Fassnacht. Nevertheless, he says it is of course useful to carry out these studies.<br></p><p>"I don't want to rule out that there are actually subgroups of people who benefit from an additional vitamin D dose," he says. After all, this has been proven to be the case with a severe deficit.</p><p>In view of the study situation, Fassnacht does not think much of preventive, nationwide vitamin D substitutes. "My belief that the vitamin helps somewhere is very low. But, of course, I can be wrong."</p>
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