frozen bubble moos
PHOTO: Craig Boehm/@Skstormchaser
frozen bubble moos
Now playing
01:56
So just how cold is it?
Now playing
02:21
Fans awed by Dolly Parton's humble response to a statue
PHOTO: Walt Disney Studios/YouTube
Now playing
02:23
Disney's 'Cruella' goes up in flames in new trailer
PHOTO: WFTS
Now playing
02:18
Backlash after Brady is asked to apologize for throwing Lombardi Trophy
PHOTO: NBC/The Tonight Show with Jimmy Fallon
Now playing
02:19
The Rock joins his mom in a ukulele duet
US ambassador to Vietnam Daniel J. Kritenbrink speaks during a ceremony to sign a memorandum of intent on dioxin remediation at a former US air base in southern Vietnam, in Hanoi on January 23, 2018. / AFP PHOTO / HOANG DINH NAM        (Photo credit should read HOANG DINH NAM/AFP via Getty Images)
PHOTO: HOANG DINH NAM/AFP/AFP via Getty Images
US ambassador to Vietnam Daniel J. Kritenbrink speaks during a ceremony to sign a memorandum of intent on dioxin remediation at a former US air base in southern Vietnam, in Hanoi on January 23, 2018. / AFP PHOTO / HOANG DINH NAM (Photo credit should read HOANG DINH NAM/AFP via Getty Images)
Now playing
02:27
US Ambassador to Vietnam releases a rap video
Now playing
02:25
Man accidentally swallows AirPod in his sleep
PHOTO: Instagram/liluzivert
Now playing
02:15
This rapper got a $24M diamond embedded in his forehead
PHOTO: Khing Hnin Wai
Now playing
02:19
Dancing fitness instructor oblivious to military coup taking place
PHOTO: Cameo
Now playing
02:12
This is how much it costs for a happy birthday from Punxsutawney Phil
PHOTO: Smithsonian's National Zoo
Now playing
02:21
See playful panda cub's virtual debut
First dogs Champ and Major Biden moved into the White House on Sunday, January 24.
https://twitter.com/firstdogsusa/status/1353684536375324672
PHOTO: Adam Schultz/White House
First dogs Champ and Major Biden moved into the White House on Sunday, January 24. https://twitter.com/firstdogsusa/status/1353684536375324672
Now playing
02:17
Internet rejoices as dogs return to the White House
bernie mittens senator sanders inauguration viral fashion moos pkg ebof vpx_00002005.png
PHOTO: Twitter/@MinnesotaMemes
bernie mittens senator sanders inauguration viral fashion moos pkg ebof vpx_00002005.png
Now playing
02:18
Bernie Sanders' 'grumpy chic' style steals show at inauguration
PHOTO: TheImageDirect.com
Now playing
02:10
Life-size cutout of Ben Affleck's ex trashed after their breakup
White House moving truck
PHOTO: CNN
White House moving truck
Now playing
02:22
Trump opponents celebrate as he moves out of White House
Donald Trump with Macaulay Culkin in a scene from Home Alone 2.
PHOTO: 20th Century Fox
Donald Trump with Macaulay Culkin in a scene from Home Alone 2.
Now playing
02:09
Actor applauds editing out Trump's 'Home Alone 2' cameo
(CNN) —  

If you’re feeling abnormally chilly lately, go ahead and blame the bomb cyclone. It’s the hottest cold-weather term at the moment, probably because it combines two already alarming words.

Bomb? Cyclone?! It’s gotta be bad.

Believe it or not, a bomb cyclone itself is actually not that dramatic, even though the bitter, dangerous cold it produces definitely is. Here’s a definition, along with a few other surprising and weird winter-weather terms.

Bomb cyclone: A bomb cyclone happens when a cyclone, which is a low-pressure rotating storm system, experiences a dramatic drop in atmospheric pressure over a short period of time. This process is known as bombogenesis, an equally cool weather word. Bomb cyclones can help draw colder air in from the North, which could, say, blast areas in the northern hemisphere with icy temperatures.

Snow eater: Also called a Chinook, this is a specific type of foehn wind that occurs in the Rocky and Sierra Mountain areas of the US. Foehn winds are warm, dry winds that blow down the lee side of a mountain – the side sheltered from winds – and are common in the winter.

Thundersnow: Thundersnow is simply thunder and lightning during a snowstorm. It may not be as alarming as it sounds, but it’s still dangerous because it combines the hazards of a thunderstorm with the decreased visibility and ground accumulation of a snowstorm. Opposite of fun.

Thundersnow visible from space during a 2016 winter storm.
PHOTO: From Twitter
Thundersnow visible from space during a 2016 winter storm.

Hoarfrost: An ugly word for a rather pretty phenomenon. Hoarfrost is the heavy frost you see lining plants, trees and other things when the air is below freezing and the atmosphere is moist. It’s basically bulky, frozen dew. Fun fact: “Hoar” is an Old English word describing old or aged-looking things, so “hoarfrost” makes things look old by covering them in white “hair.”

Lookin' hoary.
PHOTO: Matt Cardy/Getty Images
Lookin' hoary.

Arctic blast: This is basically just a sexy way of saying, “a strong cold front.” While we typically think of the word “Arctic” as just describing things that are really cold, in the case of an Arctic blast, that is literally where the cold is coming from – the Arctic!

Blame Santa for that North Pole weather.
PHOTO: Mario Tama/Getty Images
Blame Santa for that North Pole weather.

Polar vortex: We often think of a “polar vortex” as being a fleeting thing that gets blamed when it’s really cold, but the polar vortex is actually a constant thing. It’s an area of low pressure that circles the North and South Poles. The term comes up sometimes when it’s cold because polar vortices strengthen in the winter. And for the northern hemisphere, this means a higher chance of arctic air being blown in.