The coldest air of the winter so far has arrived over the northern Plains and Midwest and will cause temperatures to plummet in the Northeast in the wake of today's disruptive snowstorm.
The wave of arctic air may lead to frozen pipes in some households and eventually broken water mains in some communities.
Furnaces and heaters will be working hard in coming days, and you will get the bill for it later in the month.
There is plenty more cold coming. AccuWeather.com's Long Range Weather Pattern Expert Joe Bastardi said, "The period from January 20 to February 10 will bring the coldest weather since 2007 during the same period." Photo by photos.com.
The Great Lakes will modify the air slightly so that temperatures will manage to climb into the teens around Detroit today through the weekend.
Even a swath from the central Plains to the Ohio Valley, southern New England and northern mid-Atlantic will have episodes of nasty cold.
Over the central Appalachians from Pittsburgh to Scranton, Pa. and Binghamton, N.Y., both days of the weekend will be bitterly cold with highs in the single digits and teens, depending on your elevation.
For coastal areas of the mid-Atlantic and Northeast from Baltimore/Washington to Philadelphia, New York City and Boston, expect three days of January's finest cold. Highs will range from the teens in the north to the 20s in the south.
The coldest days and nights will occur with relatively light wind. However, as the cold air first sweeps in from west to east, AccuWeather.com RealFeel® temperatures will be 15 to 30 degrees lower than the actual temperature. After the arctic cold has settled in, even a slight breeze will be painful.
By the way, as cold as it will be by day, this air mass will produce temperatures of minus 20 degrees Fahrenheit from the Upper Midwest to northern New England at night. A number of locations may even get colder than that under clear skies and calm conditions.
Temperatures in International Falls, Minn., plummeted to minus 44 degrees early this morning. That broke the day's record low of minus 41 degrees from 1954.
The pattern will erase the above-normal temperatures experienced in northern New England since December (Caribou, Maine, was +9.4 degrees F above normal since Dec. 1., while Burlington, Vt., was +0.2 degrees and Portsmouth, N.H., was +1.8 degrees for the same period).
Temperatures are not expected to get above the freezing point for the Seattle area this weekend.
The worst of the ice headed to the eastern U.S. will focus on the I-81 corridor from Virginia to southern Pennsylvania.
While heavy snow and ice are not expected to fall over much of the Midwest Sunday into Monday, some slippery roads and travel disruptions are likely.
As the saying goes, no two snowflakes are exactly alike. Russian photographer Alexey Kljatov's collection of high-resolution magnified flakes makes this widely-held belief more convincing.
Fresh cold and the return of Santa Ana winds are in store for Southern California to start the new week.
Tropical Cyclone Madi has developed over the Bay of Bengal, northeast of Sri Lanka and east of India.
Elkton, MD (1963)
Jet liner exploded near Elkton, MD killing all 81 on board. Lightning is believed to have caused the explosion of residual fuel under one of the outboard wing tanks as plane passed through a vicious thunderstorm.
LaMesa, CA (1938)
100 degrees, warmest ever in US for Dec. Downtown LA had 91.7 degrees, only 90 degree reading in December.