An April blizzard, severe storms and wild temperature swings were all caused by a dynamic storm in the Plains.
While dynamic storms are typical in the spring as warmth returns across the South and cold air lingers across the north, this storm was quite unusual.
Blizzard conditions evolved on Tuesday from Colorado and Wyoming to Nebraska and South Dakota.
Winds over 50 mph created snow drifts as high as 9 feet, while portions of I-25 and I-80 were shut down.
Rapid City Airport, S.D., recorded its snowiest single day of all time on Tuesday with a total of 20.0 inches.
There was a total of 44 record daily snowfall amounts set in the U.S. on Tuesday, according to the National Climatic Data Center (NCDC).
This NCDC map shows the location of where record snow amounts were set on Tuesday, April 9, 2013.
On Tuesday, temperature differences across the Plains were more than 90 degrees. Highs ranged from 12 degrees in Cheyenne, Wyo., to 108 degrees in Laredo, Texas.
The violent clash of air masses helped to set up the battlegrounds for severe storms from Texas to Iowa. The strongest storms produced hail up to 2.00 inches in diameter and wind gusts higher than 65 mph.
Farther south, temperatures soared then crashed across portions of Oklahoma and Texas. The colder air arrived as winds switched out of the north.
"It's really unusual to have this magnitude of arctic air drive this far south in the Plains this time of year. It's a sign of how amplified the weather pattern is in the U.S.," AccuWeather Expert Senior Meteorologist Alex Sosnowski said.
While the high reached 79 degrees in Oklahoma City, temperatures dropped into the lower 30s overnight. Heavy thunderstorms this morning changed over to freezing rain with thunder.
"There may be a similar storm next week, but without the same magnitude of arctic air," Sosnowski said.
The coldest air of the season so far has descended on northeastern Pennsylvania and the I-80/I-81 corridors. A storm will move in Saturday and tap into some of that cold air.
Looking for a unique holiday gift idea? Ice wine will provide a special, sweet flavor if the winter weather conditions are right.
The coldest air of the season so far has descended on central Pennsylvania. A new storm will move in Saturday and tap into some of that cold air.
Episodes of snow and slippery travel are forecast prior to the departure of Arctic air this weekend around Cleveland.
The coldest air of the season so far is settling in around Boston. A new winter storm will move in this weekend and tap into the cold air.
The West (1995)
Monster storm slams into coast. Winds gusted to nearly 120 mph at Sea Lion Caves, OR. 80 mph winds at San Francisco, CA. 12.25" of rain fell in Marin, CA. 1.5 million people in the Bay area without power.
Charleston, SC (1899)
3.9" snow; greatest single storm total and 24- hour total for city.
Dover, DE (1899)
24.0" snow; December record.