A Bomb Cyclone Will Slam 70 Million People Across the U.S. Because Winter Just Won't Quit

Colorado, Wyoming, Nebraska and South Dakota will see the worst of Winter Storm Ulmer.

Bomb Cyclone - Winter Storm Ulmer
The Washington PostGetty Images

The start of spring might be just around the corner, but Mother Nature doesn't seem to care whatsoever. — which is affectionately referred to as "Bomb Cyclone" — is about to shake up the Rockies, central and northern Plains, and the Upper Midwest just before the weekend hits.

warnings are in effect for parts of seven states in the Plains as intensifies today:

— The Weather Channel (@weatherchannel)

The storm is set to bring Hurricane-like conditions with strong wind gusts, heavy snow, and dangerously low air pressure, . Colorado, Wyoming, Nebraska and South Dakota will take the brunt of it: As of Wednesday afternoon, these states have blizzard and winter storm warnings in effect and many schools and businesses are expected to be closed through Thursday. In fact, about half of the country (1.5 million square miles) have watches, warnings, or advisories in place.

So, when you should you start to hibernate? Like, yesterday. In danger of whiteout conditions and wind gusts up to 75 mph, the issued this message to locals: "Please cancel any travel plans Wednesday afternoon and evening especially east of I-25, and stay tuned for further updates!" According to , Wyoming and South Dakota have closed state offices, and a , from Ogallala, Nebraska to the state line with Wyoming, is currently closed.

The worst of the storm will happen late Wednesday but there's still plenty of wet, windy weather in the forecast for Thursday. In the morning, Ulmer will continue to hit the northern Plains with blizzard conditions and strong winds. There will also be a mix of rain and snow moving through the upper Mississippi Valley into Thursday night. After the snow stops, like Illinois, Tennessee, Arkansas, and Alabama and are at risk for severe rain and flooding.

But why is everyone calling it a "Bomb Cyclone?" If the pressure levels drop 24 millibars in less than 24 hours, it's considered . Since the start of the storm on Tuesday, the pressure has already dropped 27 millibars, which means the storm is in hurricane territory. And that's not the worst of it: reports that the storm was already equivalent to a category 1 hurricane by Wednesday afternoon but it will likely reach category 2 status later on.

One positive: Because the storm is moving at such a rapid speed, snow won't have enough time to accumulate, which means states should expect no more than one foot of snow on the ground. A silver lining!

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