AccuWeather Global Weather Center (30 Sept.) - AccuWeather reports fall air will erase the record warmth that has been gripping the Northeast, while chilly air is set to charge into the Midwest by week's end.
Temperatures climbed into the 80s as far north as northern New England. The pattern set record highs at a number of locations in New England both Saturday and Sunday.
Replacing the warmth will be temperatures that are about average for this time of the year. For instance, the average high in New York City this week is 69 F. Cloud cover and even spotty rain will mark the change as a storm system exits the mid-Atlantic coast at midweek.
After a brief spike in temperature late last week, much cooler air will take aim on the Midwest, break across the Appalachians and spill into the East for a time this weekend.
The chilly air will follow a couple of potent storm systems taking aim on the North Central states. The first will bring locally severe storms to parts of the Rockies and Plains through Tuesday. The second storm will bring a swath of cool, drenching rain to the Upper Midwest.
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According to AccuWeather Chief Meteorologist Elliot Abrams, "Thunderstorms may accompany the cool front that will reach into the East this weekend."
Gusty winds will accompany and follow the push of cooler air this weekend.
"The autumn winds that follow that front will be noticeable as we have not had many events like this yet since the start of meteorological fall: Sept. 1," Abrams said.
"While it will not get cold enough for snow around the Upper Midwest to the central Appalachians, there will be bands of angry looking clouds and rain downwind of the Great Lakes, known as lake-effect."
By Saturday, AccuWeather RealFeel® temperatures may be held to the 40s much of the day around the Great Lakes and central Appalachians. By Sunday, RealFeel® temperatures may be in the 50s at times farther to the east.
As temperatures slip, clouds gather and winds kick up this fall, the AccuWeather RealFeel® temperature can help you determine what it actually feels like outside. Factoring in wind, sun angle, cloud cover and many other factors, this patented index can help you better prepare and dress for changeable fall weather.
Early indications are the push of blustery and cool conditions forecast for this weekend will be brief along the Interstate 95 corridor.
Temperatures are forecast to slowly trend upward next week in the East. A delay in the rebound is possible early in the week around the lower Great Lakes due to clouds and showers.
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According to AccuWeather Long-Range Expert Paul Pastelok, "The overall pattern through the middle of October is likely to favor punches of cool air moving into the Midwest, which lose strength or only briefly visit the Atlantic coast."
During October, on average, temperatures trend downward by a degree every two to three days. As a result, at New York City, for example, a 70-degree high may be near average for early in October, but nearly 10 degrees above average by the third week of the October.
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By Alex Sosnowski, Expert Meteorologist for AccuWeather.com
