Mother Nature is providing a final taste of temperatures typical of late September across the Midwest and Northeast before the return to November values return by late week into the weekend.
The reason behind the surge of warmer air this week is due to the jet stream well north of the eastern United States.
According to AccuWeather Senior Meteorologist Matt Rinde, "November is off to a warm start over a large portion of the eastern U.S., and it will continue for most of this week thanks to high pressure in control and southerly surface winds."
The jet stream tends to be the divider between the warmer air to the south and cooler air to the north.
Temperatures across much of the Midwest and Northeast will range between 10 and 20 degrees Fahrenheit above average for early November.
Those heading outdoors for any activities can leave the jackets in the closets as high temperatures will rise into the 60s and 70s for much of the week.
The warmest day of the week will occur for the day prior to the passage of an approaching cold front. This will also be the day that some major cities will challenge record-high temperatures.
Temperatures across the Midwest could challenge record highs across the Upper Midwest into Wednesday from Minneapolis to Omaha, Nebraska; Chicago; and St. Louis.
According to AccuWeather Meteorologist Michael Doll, "The record highs that will be challenged on Wednesday in Des Moines, Iowa, and Omaha, Nebraska, are over 100-year-old records."
By Thursday, places from Indianapolis; Detroit; and Columbus, Ohio, will challenge record highs.
"Record highs in Detroit and Grand Rapids, Michigan, on Thursday were a little more recent and set in 1978," Doll said.
Those heading to Cincinnati on Thursday night for Thursday night football between the Bengals and the Cleveland Browns will have terrific conditions for football. Temperatures will range from the lower 70s to the upper 60s during the game. Rain will likely hold off until after the game.
New York, Boston, Washington, D.C., and Philadelphia will be approaching record-high temperatures on Friday.
The weather will be excellent this week for outdoor plans such as raking up leaves, going for a run or enjoying one last round of golf before winter arrives.
Not only will the temperatures rise this week but also humidity, which will cause a large portion of the eastern U.S. to deal with dense fog during the overnight and early morning hours, which could lead to difficult driving conditions for the morning commutes to work.
The storm system responsible for the rain, snow and chilly conditions across the western U.S. will be the system that will erase the warmth across the eastern U.S. later this week.
"A strong frontal system will lead to cooler weather this coming weekend with temperatures closer to average across much of the eastern U.S.," Rinde said.
Wet weather will accompany the push of cooler air. Showers will dot the Upper Midwest on Thursday before a steady rain drenches the upper Great Lakes and Ohio Valley on Thursday night into Friday.
Moisture will be lacking as the storm moves into the Northeast late Friday into Friday night. Most of the mid-Atlantic and Northeast will only have a spotty shower.
The arrival of the cooler air will be to the Midwest on Thursday, the Ohio Valley on Friday and the Northeast on Saturday.
"Within a couple of days after the cold front moves through, high temperatures will be around 20 degrees lower compared to what occurred ahead of the front," Doll said.
Many areas will have high temperatures below average for a day or two.
The shot of cooler, seasonable air will be a shock to many after a prolonged period of above-normal temperatures.
Winds will pick up out of the west-northwest behind the front. Gusty winds, combined with the cooler temperatures will lead to chilly AccuWeather Realfeel® temperatures.
Much-cooler air over the relatively warm lakes will set the stage for lake-effect rain showers to develop from Michigan into southern Ontario, northwestern Pennsylvania and western New York on Saturday.
"Temperatures can change dramatically during the month of November," AccuWeather Senior Meteorologist Elliot Abrams said.
"For example, the record-high temperature in Providence, Rhode Island, was 77 F in 1938. That same year, record-low temperatures were set on Nov. 25 and 26, dipping to 12 and 10 F, respectively."
While the weekend across the East will be quite cool, there are signs of a recovery early next week.
"Temperatures across the East could moderate back to above-average values next week," Abrams said.