Following one more nice but brief warm-up in the East Sunday into Monday, temperatures will fall back to levels more typical of early winter and remain there indefinitely.

In addition, a storm system bringing colder air into the Northeast toward the middle of next week could end up being a big snowmaker for parts of the Northeast and/or Midwest, depending on the exact track it takes.

So people who have been enjoying the recent above-normal warmth will have one last chance take advantage of milder weather before winter truly kicks in.

Temperatures will rise 10 to 15 degrees above normal once again across the East Monday with highs hitting the mid- to upper 50s from southern New England into the mid-Atlantic, including cities such as New York and Boston. Philadelphia and Washington, D.C., are even expected to hit the 60-degree mark.

Highs will be in the 70s farther south from the eastern Carolinas to the central Gulf Coast and 80s in southern Florida to start next week.

The warmth will be erased by the middle of next week as a cold front pushes in from the west. There is the potential for a storm system to form along this front, bringing rain to areas south and east of the storm center and heavy snow to the north and west.

Be sure to check back with AccuWeather.com in the coming days for more details on this storm potential.

Temperatures will drop back near average behind the system and remain at colder December normals in the coming weeks.

For more information on what to expect for the upcoming winter, check out our updated AccuWeather.com 2011-2012 Winter Forecast.