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Brandi Simons/Getty Images
Brandi Simons/Getty Images

Why the Weather on the Great Plains Is So Extreme

Brandi Simons/Getty Images
Brandi Simons/Getty Images

It can be tough to live on the Great Plains. The flat terrain gives way to breathtaking views of both land and sky, but the smooth, fertile land is both good fortune and a curse when it comes to the weather. Whether it's an enormous thunderstorm or a ferocious blizzard, there's rarely a dull day when it comes to weather in the middle of the country. Just what is it about the central United States that makes the weather there so extreme?

The unique geography that makes this part of the country so grand is what exposes it to some of the most extreme weather nature can produce. The Plains are bounded by the Rocky Mountains to the west, the Canadian Prairies to the north, and the Gulf of Mexico to the south. The tall, jagged mountains of the Rockies act like an atmospheric dam, forcing hot air from the south and cold air from the north to pool up over the Plains. This helps to trigger some of the most interesting weather in the world.

Most major weather events around the world are set in motion by jet streams, which are fast-moving currents of air that wrap around the planet. Straight, rigid jet streams don't result in much interesting weather, but things can get wild when the jet stream grows wavy. Sharp dips in the jet stream, called troughs, can cause low-pressure systems to develop at the surface.

When these troughs clear the Rocky Mountains in the western U.S., diverging winds in the upper atmosphere cause air to rise from the surface, leading to the development of a low-pressure system over the Plains. These lows can be the size of a single state or sprawl across the entire country from north to south. We see these storm systems most often during the winter and spring, when the jet stream is most active over the United States.

The flat land acts like an expressway, helping these fledgling low-pressure systems draw enormous amounts of tropical air from the south and, during the winter, extremely cold air from deep in the Arctic. The lack of natural obstacles allows this air to flow toward storm systems virtually unimpeded, which can lead to explosive thunderstorms during the warm months and powerful and bone-chilling blizzards during the winter.

This atmospheric expressway doesn't stop at precipitation; it's also why the central Plains can have brutal heat waves and bitter cold snaps. It's not uncommon for areas in the north-central United States to struggle to climb above 0°F for days at a time during the dead of winter, and it's similarly common for places like Oklahoma and Texas to see temperatures above 100°F for a week or longer during the summer's worst heat.

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Weather Watch
It Just Snowed In the Sahara for the Second Time In Less Than a Month
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iStock

The town of Aïn Séfra, Algeria might need to find a new nickname. Though it’s often referred to as “The Gateway to the Sahara,” the 137-year-old province in northwest Algeria is currently digging out from a rare—and unexpected—snowstorm that left the desert town covered in several inches of snow and battling sub-zero temperatures.

While the Daily Mail reported that “locals took to the nearby sand dunes to enjoy the unusual weather,” the strangest part of the story is that this is Aïn Séfra’s second snowfall in less than a month. On Sunday, January 7, a freak blizzard left parts of the Sahara blanketed in as much as 16 inches of snow.

This most recent storm marked the region’s fourth snowfall in nearly 40 years; in addition to January's dose of the white stuff, the area has been hit with other surprise wintry events in February 1979 and December 2016.

But North Africa isn’t the only area that’s seeing record-breaking weather events. On Saturday, February 3, 17 inches of snow fell on Moscow within 24 hours in what the country has dubbed “the snowfall of the century.” In mid-January, Oymyakon, Russia—a rural village in the Yakutia region, which is already well known as one of the coldest inhabited areas of the world—saw temperatures drop to -88.6°F, making it chilly enough to both bust thermometers and freeze people’s eyelashes. And you thought dealing with single-digit temperatures was tough!

[h/t: Daily Mail]

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Weather Watch
Record-Breaking 17 Inches of Snow Covers Moscow in 24 Hours
Vasily Maximov, AFP/Getty Images
Vasily Maximov, AFP/Getty Images

Moscow sees some of the most brutal winters of any world capital, but even locals weren't prepared for the most recent winter storm to batter the city. As Newsweek reports, a record-breaking 17 inches of snow buried Moscow within 24 hours.

Roughly 7 inches of snow fell just on Saturday, February 3, and the deluge continued through the following Sunday. The accumulation has already been dubbed the "snowfall of the century," and officials expect up to 3 additional inches to cover the ground over the next three days.

The sudden blizzard has brought life to a stand-still in the metropolis of 12 million. The mayor is warning motorists to stay off the roads as around 15,000 snowplows clear the snow. About 2000 trees have been toppled by the storm, injuring at least five people and killing one.

Even as the worst of the weather winds down, over 40,000 people in Moscow and the surrounding regions are without power. Meanwhile, traveling in and out of the city has become close to impossible: Around 100 flights are grounded at the local airport indefinitely and at least 10 have been canceled all together.

The historic snowfall hasn't stopped many of Moscow's tougher residents from venturing outside. Check out photos from the event below.

Person cross-country skiing over snow in Moscow.
Yuri Kadobnov, AFP/Getty Images

Walking through a blizzard in Moscow.
Yuri Kadobnov, AFP/Getty Images

Walking through the snow in Moscow.
Yuri Kadobnov, AFP/Getty Images

Walking through the snow in Moscow.
Yuri Kadobnov, AFP/Getty Images

[h/t Newsweek]

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