The polar vortex is headed southward once again, returning dangerously cold air to the Midwest and Northeast in the upcoming days.
The polar plunge that invaded the Upper Midwest on Monday will continue to spread across more of the eastern half of the U.S. through Tuesday night.
While temperatures will drop below freezing as far south as northern Florida on Tuesday night, the core of the cold will center on the Midwest and Northeast.
Highs will be held to the single digits and teens across these two regions once the frigid air takes up residence. Temperatures will even remain below zero during the daylight hours on Tuesday in and around Minnesota and the St. Lawrence Valley.
Temperatures dropping to at least 20 below zero over parts of Minnesota on Monday night, 10 below zero or lower is expected across the entire St. Lawrence Valley on Tuesday night. The entire state of Minnesota was reporting with below zero-degree temperatures by 2:30 a.m. CST.
Record high temperatures stretched across the Plains on Sunday, including in Lincoln, Neb., where it reached 66 degrees. But by 4 a.m. CST on Tuesday, the temperature was already below zero degrees. Temperatures are expected to drop another 5 to 10 degrees across the region.
The good news is that prolonged biting winds will not accompany this cold blast in the Midwest, preventing a repeat of the extremely low AccuWeather.com RealFeel® temperatures that were registered earlier this month.
The Northeast coast will have to endure an extended stretch of brisk and frigid winds in the wake of Tuesday's snow.
The magnitude of this cold blast is still dangerous enough to put residents who do not properly bundle up at risk for frostbite and hypothermia.
Care should also be taken to ensure that livestock and other animals housed outdoors have adequate shelter.
"The cold may be intense enough to cause school closings, frozen pipes and water main breaks," stated AccuWeather.com Expert Senior Meteorologist Alex Sosnowski. "Heating systems may struggle to keep up, people will spend more money keeping their homes and businesses warm and ice will again build up on area rivers."
The Alberta Clipper at the leading edge of the dangerous cold blast will spread snow from the Dakotas to the Ohio Valley, mid-Atlantic and southern New England through Tuesday.
A band of steadier and more disruptive snow will unfold along the spine of the Appalachians to, the Delmarva Peninsula, central New Jersey and Cape Cod. Washington, D.C., Philadelphia and New York City lie within this zone.
A couple of snow showers will even spread as far south as the North Carolina/Virginia border.
Beyond Wednesday, temperatures may slightly rebound, but frigid air should win out for the remainder of the month.
The next shot of arctic air due to reach the U.S. on Wednesday and Thursday will encompass more of the Plains than the early week blast.
Periods of rain will drench portions of the northeastern United States Friday.
There is a significant chance the tropical system brewing near the Caribbean could take a turn toward the United States next week.
The final day of September will bring a rare lunar event that hasn’t occurred since March of 2014, a Black Moon.
Communities along the Cedar River in Iowa are bracing for some of the highest water levels in nearly a decade following excessive rainfall across the region last week.
Following some rain and gusty winds on Tuesday, a strong storm will target the United Kingdom on Thursday.
Typhoon Megi will threaten lives and property in eastern China into the middle of the week after slamming Taiwan.
Kansas City, MO (1988)
A total of 4 inches of rain from thunderstorms creates major flooding in the city.
Jacksonville, FL (1989)
Torrential rain again within 4 days. Downtown Jacksonville had 16 inches of rain in less than a week. The airport record over 8".
Nome, AK (1992)
9 degrees, a record low for September.