Temperatures will peak on Wednesday over much of the Northeast, but they will continue to build in much of the North Central states through the end of the week.
Highs are forecast to reach the 60s from New York City to Washington, D.C., on Wednesday. The weather will deliver the highest temperatures since Christmastime in some cases.
In parts of New England, temperatures will peak well into the 40s and lower 50s with the warmest conditions since January.
A press of chilly air is forecast to dip into the Northeast states Thursday into Friday and will result in temperatures trending to near or slightly below average for the middle of March.
Even with the chilly press, highs will still be in the 40s around New York City, near 50 in Philadelphia and in the 30s over the interior Northeast. Washington, D.C., will have temperatures registering well into the 50s on Thursday before dropping into the 40s on Friday.
A storm is forecast to push up into the chilly air with rain, but also some snow and ice this weekend in New England.
Meanwhile, in much of the Midwest, temperatures are projected to remain well above average through the weekend. Highs will be well into the 50s, 60s and 70s in some cases.
Temperatures will challenge record highs on one or more days over the northern Plains in Minneapolis; Omaha, Nebraska; Rapid City, South Dakota; and Des Moines, Iowa.
In Fargo, North Dakota, the record of 62 F set in 1910 will be rivaled on Thursday.
Around Chicago, highs will be near or above 50 F through the weekend.
Despite the warmth forecast for the northern Plains, a lack of both snowcover and drenching rainstorms will translate to limited or no concerns for flooding over the upper Mississippi River and the Red River of the North.
A farther-reaching and more substantial push of chilly air will spread out of central Canada and into the Midwest and Northeast during next week.
AccuWeather.com will have more on the return of cold air to the Midwest and Northeast for next week in the coming days.