A monster cold wave brought drastic changes to the Plains and Rockies already this week, but the cold will shift farther east this weekend.
Twitter was busy Friday morning with countless first snow pictures from the central part of the country, including the Denver metro area.
The cold wave fueling the snow across the Plains and Rockies will spread south and east through the weekend.
By Saturday night, the cold front initiating the cold wave will move off the East Coast as a much colder night advances into the Ohio Valley to the Appalachians.
For Chicago and Indianapolis along with surrounding areas, Saturday night will be the coldest since April.
"Normally, a freeze in early October in the Ohio Valley would cause problems with major agriculture, but they are nearly a month ahead of schedule because of the warm spring and hot summer," said Expert Senior Meteorologist and Agricultural Expert Dale Mohler.
"However, the cold wave will signal an end to the growing season for backyard gardeners," added Mohler.
Any remaining vegetables in gardens should be plucked off before the killing cold moves in.
While lows will gradually rise across the Plains Sunday night, the expanse of the cold weather will be at its greatest breadth.
Lows will tumble into the 30s from the Texas Panhandle, east into Tennessee and Virginia.
Cities such as Amarillo, Texas, to Springfield, Mo., and Nashville will tumble into the 30s Sunday night, all well below average for this time of the year.
It will be cold enough across the Northeast to support some of the first snow of the season Sunday into Sunday night.
Temperatures will rise to more seasonable levels next week for most, but areas from the northern Plains to the Great Lakes and Northeast will see repeated rounds of cold, bone-chilling air. An active northern branch of the jet stream will contribute to the repeated rounds of cold.
A sharp warmup and flood threat will follow the frigid Valentine’s Day weekend in New York City.
A wet start to the weekend across Spain with flooding rain threatening northwestern areas will turn into a chilly Valentine's Day.
A storm will bring snow and ice that will lead to slippery travel along a 1,500-mile swath from northern Arkansas and Georgia to Maine early next week.
The coldest air of the winter will plunge southward across much of the eastern United States and will feature single-digit and sub-zero temperatures in the Northeast during Valentine's Day weekend.
A blast of arctic air will be accompanied by flurries and even a localized wall of snow in some communities in the Northeast and parts of the Midwest at the start of the Valentine's Day weekend.
Heavy rain will raise the risk of flooding across more than a dozen states in the Southeast on Presidents Day to the East Coast on Tuesday.
San Francisco, CA (2001)
High only 44 degrees, record low maximum for date.
Savannah, GA (1899)
(12th-13th) 2 in. snowfall, one of 3 snowstorms in past 200 years that required a ruler measurement.
Great Arctic Outbreak (1899)
Great Arctic Outbreak Continues: Dallas-Fort Worth, TX -8 deg. F., all time low. Amarillo, TX - 16 deg. F., all time low. Tulia, TX -23 deg. F., tied for all time Texas low. Camp Clarke, NE -47 deg. F., state record low temp. Little Rock, AR Absolute Min. -13 deg. F.