In case there was any doubt…winter has officially arrived in Iowa. This weekend promises to be the chilliest of the season, and possibly the century. Thanks to the upcoming polar vortex, temperatures will drop so low that meteorologists are advising one thing: do not go outside. Here’s more on how the area of Des Moines and most other parts of the state will be in for a terribly frigid weekend.

Iowa may be in for its chilliest weekend since 1901. Starting Saturday night, the low will drop down to 12 degrees F.

Alan Light/flickr

With blustering winds exceeding 20 MPH, the windchill will actually feel more like -25 degrees.

WindRanch/flickr

The National Weather Service has predicted that the windchill in the Des Moines area will drop to more than -30 degrees F by Sunday morning.

Jason Mrachina/flickr

Residents of northern Iowa should be particularly cautious. Lows in that area could reach -25 degrees with a windchill of 40 below. Northern Iowa is also expected to experience 4 to 6 inches of snow.

Phil Roeder/flickr

So what causes a polar vortex to deliver such extreme temperatures? This phenomenon begins at the Earth’s poles, where low pressure and cold air accumulate. During the winter, the vortex expands and is pulled into North America.

NASA Goddard Space Flight/flickr

Officials have advised Iowans to avoid being outside unless it’s absolutely necessary. Startling low temperatures like these are grounds for hypothermia and frostbite.

Tony Webster/flickr

If you must be outside, be sure to cover all exposed skin and return back inside as quickly as possible. Otherwise, take advantage of these temperatures and stay cozy indoors.

Jason Mrachina/flickr

Be sure to stay alert to local weather advisories and stay as safe as possible. What do you think about this incredible weather forecast? Feel free to share your thoughts with us!

Alan Light/flickr

WindRanch/flickr

Jason Mrachina/flickr

Phil Roeder/flickr

NASA Goddard Space Flight/flickr

Tony Webster/flickr

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