North America is in the grip of a record-setting cold spell that’s set to culminate with the arrival of a “bomb cyclone” along the eastern seaboard late Thursday. The cold front has delivered temperatures that haven’t been seen in decades.

Already, stories about the epic cold snap have proliferated online. As we pointed out yesterday, a group of good Samaritans helped rescue a dozen elk that had crashed trough a thin patch of river ice and were in danger of freezing to death, or drowning. At the time, temperatures were below freezing across a staggering 92% of the US, with temperatures more than 20 degrees lower than their seasonal averages for this time of year.

Winter Storm Grayson, a very large and powerful winter storm is threatening the East Coast of the United States with heavy snow, intense winds, and record-setting low temperatures. Winter storm watches and warnings have been issued for many coastal regions in north Florida to Maine from Wednesday into late Thursday.

This week’s storm may end up being worse than your average nor’easter. That’s because meteorologists say it could produce a “bomb cyclone,” otherwise known as a bombogenesis, a phenomenon that occurs when a system’s central pressure drops steeply – by 24 millibars or more – in 24 hours.

If current computer models hold, that’ll start to happen somewhere off Cape Hatteras, North Carolina, and continue as the storm moves north. Hurricane-force wind warnings have been posted off the coast where ships could encounter winds of 80 miles (130 kilometers) an hour and waves as high as 26 feet on Thursday.

Already, the unusual weather patterns are causing all sorts of strange phenomena around the country. According to the New York Times, it’s too cold for many zoo penguins, which have been taken inside as a precaution ahead of the storm. Meanwhile, sharks have washed up dead on the Atlantic coast.

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