Blaine Webb helps a SEPTA employee shovel out a bus from the snow March 14, 2017 in Spring City, Pennsylvania.
How strong a blizzard's impact may be
Snow storms are often referred to as blizzards, but that's not accurate. CNN's Derek Van Dam explains which weather conditions must occur before a snow storm can be called a blizzard.
01:20 - Source: CNN
Winter weather 15 videos
Blaine Webb helps a SEPTA employee shovel out a bus from the snow March 14, 2017 in Spring City, Pennsylvania.
How strong a blizzard's impact may be
01:20
Now playing
- Source: CNN
not do in snow 1
What NOT to do in a snowstorm
01:32
Now playing
- Source: CNN
nor'easter explainer orig nws_00002211.jpg
What is a nor'easter?
01:03
Now playing
- Source: CNN
bomb cyclon radar
Just what exactly is a 'bomb cyclone'?
00:52
Now playing
- Source: CNN
Winter weather 1
This is what subzero temperatures look like
01:24
Now playing
- Source: CNN
Braving winter travel_00005605.jpg
Travel tips for winter weather
03:18
Now playing
- Source: CNN
In this photo taken on Sunday, Jan. 14, 2018, Anastasia Gruzdeva poses for selfie as the Temperature dropped to about -50 degrees (-58 degrees Fahrenheit) in Yakutsk, Russia. Temperatures in the remote, diamond-rich Russian region of Yakutia have dropped to near-record lows, plunging to -67 degrees Centigrade (-88.6 degrees Fahrenheit) in some areas. (sakhalife.ru photo via AP)
It's so cold here that eyelashes are freezing
01:04
Now playing
- Source: CNN
title:  duration: 00:00:00 site:  author:  published:  intervention: yes description:
It snowed in one of the world's hottest places
00:37
Now playing
- Source: CNN
Plane Nor'easter
Plane aborts landing amid ferocious winds
00:58
Now playing
- Source: CNN
frozen bubble moos
So just how cold is it?
01:56
Now playing
- Source: CNN
freezing rain sleet snow orig_00000810.jpg
What's the difference between freezing rain and sleet?
01:04
Now playing
- Source: CNN
People walk through Times Square during a winter storm, February 9, 2017 in New York  / AFP / Bryan R. Smith        (Photo credit should read BRYAN R. SMITH/AFP/Getty Images)
This is what thundersnow sounds like
00:45
Now playing
- Source: CNN
blizzard explainer defintion nws orig_00011424.jpg
Is this storm really a blizzard?
01:26
Now playing
- Source: CNN
lake-effect snow orig_00000000.jpg
What is lake-effect snow?
01:02
Now playing
- Source: CNN
Tian Tian giant panda snow zoo orig vstop dlewis_00000000.jpg
Giant panda's heartwarming snow day
00:45
Now playing
- Source: CNN