It Just Snowed In the Sahara Desert

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iStock

The Sahara isn’t always scorching. This week, a cold spell hit the town of Aïn Séfra in northern Algeria, and the world’s largest hot desert was blanketed in up to 16 inches of the white stuff in some places, The Independent reports.

The rare snowfall began early on Sunday, January 7, with the resulting precipitation melting by late afternoon. The phenomenon marked the region’s third snowfall in nearly 40 years, with other surprise wintry events occurring in February 1979 and December 2016.

Aïn Séfra is located in the Saharan Atlas Mountains in the northern Sahara Desert. Thanks to the region’s altitude, it's “not surprising that the area would see some snow if the conditions were right” a spokesperson for the Met Office, the UK’s national weather service, told The Independent. "With the setup over Europe at the moment, which has given us cold weather over the weekend, a push southwards of cold air into that region and some sort of moisture would bring that snow."

Kids enjoyed the freak snowfall, making snowmen and sledding down sand dunes, while adults had to deal with their vehicles getting stranded on icy roads, according to Forbes. By the day's end, temperatures climbed to 42°F and sand dunes returned to their ordinary brown—just long enough for residents of Aïn Séfra to experience both the highs and lows of an ordinary snow day.

[h/t The Independent]

What is a Polar Vortex?

Edward Stojakovic, Flickr // CC BY 2.0
Edward Stojakovic, Flickr // CC BY 2.0

If you’ve turned on the news or stepped outside lately, you're familiar with the record-breaking cold that is blanketing a lot of North America. According to The Washington Post, a mass of bone-chilling air over Canada—a polar vortex—split into three parts at the beginning of 2019, and one is making its way to the eastern U.S. Polar vortexes can push frigid air straight from the arctic tundra into more temperate regions. But just what is this weather phenomenon?

How does a polar vortex form?

Polar vortexes are basically arctic hurricanes or cyclones. NASA defines them as “a whirling and persistent large area of low pressure, found typically over both North and South poles.” A winter phenomenon, vortexes develop as the sun sets over the pole and temperatures cool, and occur in the middle and upper troposphere and the stratosphere (roughly, between six and 31 miles above the Earth’s surface).

Where will a polar vortex hit?

In the Northern Hemisphere, the vortexes move in a counterclockwise direction. Typically, they dip down over Canada, but according to NBC News, polar vortexes can move into the contiguous U.S. due to warm weather over Greenland or Alaska—which forces denser cold air south—or other weather patterns.

Polar vortexes aren't rare—in fact, arctic winds do sometimes dip down into the eastern U.S.—but sometimes the sheer size of the area affected is much greater than normal.

How cold is a polar vortex?

So cold that frozen sharks have been known to wash up on Cape Cod beaches. So cold that animal keepers at the Calgary Zoo in Alberta, Canada once decided to bring its group of king penguins indoors for warmth (the species lives on islands north of Antarctica and the birds aren't used to extreme cold.) Even parts of Alabama and other regions in the Deep South have seen single-digit temperatures and wind chills below zero.

But thankfully, this type of arctic freeze doesn't stick around forever: Temperatures will gradually warm up.

A Simple Trick for Defrosting Your Windshield in Less Than 60 Seconds

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iStock

As beautiful as a winter snowfall can be, the white stuff is certainly not without its irritations—especially if you have to get into your car and go somewhere. As if shoveling a path to the driver’s door wasn’t enough, then you’ve got a frozen windshield with which to contend. Everyone has his or her own tricks for warming up a car in record time—including appropriately-named meteorologist Ken Weathers, who works at WATE in Knoxville, Tennessee.

A while back, Weathers shared a homemade trick for defrosting your windshield in less than 60 seconds: spray the glass with a simple solution of one part water and two parts rubbing alcohol. “The reason why this works,” according to Weathers, “is [that] rubbing alcohol has a freezing point of 128 degrees below freezing.”

Watch the spray in action below.

[h/t: Travel + Leisure]

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