Record warmth to invade Plains to Northeast this week

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By Jordan Root for AccuWeather.com

A surge of warmth will invade the eastern U.S. this week, putting decades-old temperature records at risk of being broken.

A large section of the nation extending from the southern Plains to Ohio Valley and into the Northeast and mid-Atlantic will experience temperatures 10 to 20 degrees Fahrenheit above average each afternoon over the next few days. In some cities, high temperature records will be broken.

"A strong area of high pressure over the Southeast will help funnel very warm air northward for the first half of the week," AccuWeather Meteorologist Andy Mussoline said.

As a result, the air will feel more like the beginning of September rather than mid-October.

The warmest air on Monday will be found across the Plains to the Midwest where upper 80s and 90s F will be widespread during the afternoon.

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Some cities such as St. Louis; Little Rock, Arkansas; Tulsa, Oklahoma; and Memphis and Nashville, Tennessee could tie or perhaps break high temperature records.

This warmth will shift east on Tuesday and Wednesday, focusing on the Northeast, mid-Atlantic and Southeast. Temperatures are expected to rise into the 80s outside of the Appalachians. Even in the Appalachians, temperatures will make it into the 70s.

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The first day of autumn around the world
LONDON, ENGLAND - SEPTEMBER 22: A band of cloud stretches across the sky as the sun sets behind St Pauls Cathedral and cranes on the skyline on September 22, 2016 in London, England. The sun sets on the autumnal equinox which marks the first official day of autumn in the United Kingdom. (Photo by Chris J Ratcliffe/Getty Images)
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LONDON, ENGLAND - SEPTEMBER 22: A heron in Richmond Park on September 22, 2016 in London, England. Today marks the first day of autumn, also known as the autumn equinox, where night and day are equal. (Photo by Jack Taylor/Getty Images)
Windmills are seen through the morning mist rising from a field in Sehnde near Hanover, northern Germany, on September 22, 2016. Autumn officially begins on the equinox on September 22. / AFP / dpa / Julian Stratenschulte / Germany OUT (Photo credit should read JULIAN STRATENSCHULTE/AFP/Getty Images)
LONDON, ENGLAND - SEPTEMBER 22: A man goes for a run in Richmond Park on September 22, 2016 in London, England. Today marks the first day of autumn, also known as the autumn equinox, where night and day are equal. (Photo by Jack Taylor/Getty Images)
Morning mist hangs over the river Elbe in Dresden, eastern Germany, on September 22, 2016. Autumn officially begins on the equinox on September 22. / AFP / dpa / Arno Burgi / Germany OUT (Photo credit should read ARNO BURGI/AFP/Getty Images)
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Morning mist hangs over the historic old town in Dresden, eastern Germany, on September 22, 2016. Autumn officially begins on the equinox on September 22. / AFP / dpa / Arno Burgi / Germany OUT (Photo credit should read ARNO BURGI/AFP/Getty Images)
Great Slave Lake and Jolliffe Island are seen from the Pilot Monument in Yellowknife, Northwest Territories, in this picture taken September 22, 2015. Each winter, in the far reaches of Canada's north, a highway of ice built atop frozen lakes and tundra acts as a supply lifeline to remote diamond mines, bustling with traffic for a couple of months before melting away in the spring. Due to unseasonably warm weather, this year the world's busiest ice road is running late. Picture taken on September 22, 2015. REUTERS/Susan Taylor
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"Highs in the upper 70s and 80s are more typical during the last weeks of summer across the Northeast and mid-Atlantic," Mussoline said.

On Tuesday and Wednesday, New York City, Philadelphia, Baltimore, and Washington, D.C., could watch records fall as temperatures reach well into the 80s.Some records in jeopardy have stood since the 1900s.

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In addition to daytime temperatures being well above average, overnight lows each night through the middle of the week will be exceptionally mild as well, only dropping into the 50s and 60s across the Northeast.

Some areas that have already seen their first frost and freeze may not see the temperature drop below 55 through Wednesday.

With several chilly nights occurring this past week, many people have started to dig out the winter jackets and coats. However, those can be put aside for a few days this week and replaced with more summerlike clothing.

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With high pressure in control, dry weather with sunshine is expected early this week across the Plains to the Northeast. This will provide beautiful weather to get outside and enjoy the fall foliage or attend local autumn festivals.

The upcoming warm stretch could have a negative affect on leaf color, leaving leaf-peepers disappointed. Mild days and cool nights are usually ideal when it comes to the best foliage colors. However, days and nights this week may be too warm and could cause colors to become dull.

The dry weather is bad news for New England where drought continues. Rainfall deficits over the past three months range from 4 to 8 inches in a large section of the region.

The next chance of rain may come during the second half of the week across the Northeast. A storm system may form along a slow-moving cold front across the region and could deliver a round of soaking rain Thursday into Saturday.

As for the warmth, cooler air will follow in behind this system this weekend and will help bring temperatures back to normal or slightly below normal. If enough cold air is pulled southward out of Canada, the northern Great Lakes could see their first snowflakes.

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