September-Like Warmth to be Slashed Across Midwest, Northeast US By Late Week

By Brett Rathbun, AccuWeather.com Meteorologist

November 3,2015; 10:00PM,EST

 

 

After days of temperatures typical of late September across the Midwest and Northeast, cool air will invade the region 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.
"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," AccuWeather Senior Meteorologist Matt Rinde.
The jet stream tends to be the divider between the warmer air to the south and cooler air to the north.

Record Breaking Warmth on the Way

Temperatures across much of the Midwest and Northeast will range between 10 and 20 degrees Fahrenheit above average until late in the week.
Those heading outdoors for any activities can leave the jackets in the closets as high temperatures will rise into the 60s and 70s Fahrenheit for much of the week.
Temperatures across the Midwest could challenge record highs across the Upper Midwest into Wednesday from Minneapolis to Omaha, Nebraska; Chicago; and St. Louis.
"The record highs that will be challenged on Wednesday in Des Moines, Iowa, and Omaha, Nebraska, are over 100-year-old records," AccuWeather Meteorologist Michael Doll said.

By Thursday, places from Indianapolis; Detroit; and Columbus, Ohio, will challenge record highs.
Those heading to Cincinnati 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 approach record-high temperatures on Friday.
RELATED:
US Interactive Radar
US El Nino Forecast: California, East to Bear Brunt of Impacts This Winter
US Winter Forecast: Northeast to Dodge Winter's Brutal Cold; Rain, Snow to Dent California Drought
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.
Humidity levels will also be on the rise this week, draping a large portion of the eastern U.S. with dense fog during the overnight and early morning hours.The fog could make for difficult driving conditions for the morning commute to work.
The storm system responsible for the rain, snow and chilly conditions across the western U.S. 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 see 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 see 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.
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.