Comfortable air to quell sweltering heat in Northeast, but with a caveat
By
Alex Sosnowski, AccuWeather senior meteorologist
Published Jun 10, 2020 3:07 PM EST
A taste of the dog days of summer was felt across the northeastern United States as temperatures soared 10-15 degrees Fahrenheit above normal during the second week of June. Progressively cooler conditions will spread from the Great Lakes to the coast into this weekend.
An area of high pressure building over south-central Canada will create a flow of air from the northwest across the Midwest, New England and the central Appalachians -- and forecasters say the flow will draw in much more comfortable air.
High temperatures in the 80s to lower 90s from Wednesday will be but a memory with highs forecast to range from the middle 60s over the mountains and in northern New England to the lower 80s along the lower mid-Atlantic coast this weekend.
"Temperatures will swing to 5-15 degrees below average for the middle of June by this weekend," said AccuWeather Meteorologist Nicole LoBiondo.
During the middle of June, high temperatures average near 70 over northern New England to the middle 80s in the lower Chesapeake Bay region.
The cool press will come in two surges, according to AccuWeather Meteorologist Courtney Travis.
"One surge moved in during Thursday night, then the second and even cooler surge will take place from northwest to southeast over the region this weekend," Travis explained.
Unlike some blasts of chilly air that have occurred in recent weeks in the region, this cool push will not race hundreds of miles out to sea over the Atlantic.
Instead, the advance of cool air will slow and stall along the southern Atlantic and lower mid-Atlantic coasts late this week and this weekend.
An area of high pressure over the central Atlantic will fight back and pump humid air northwestward into the Southeast states through much of next week.
During June, the nearly stationary area of high pressure over the Atlantic, which can push warm and humid air back across the East, typically remains strong and is less likely to be shoved farther east like it can be during the spring months.
"At the same time you have the high pressure area building over the Atlantic, a dip in the jet stream will develop near the lower Great Lakes and the central Appalachians, which will work to keep temperatures suppressed much of next week in the East," Paul Pastelok, AccuWeather lead long-range forecaster, said.
AccuWeather forecasters will continue to monitor how far north humid air will be able to progress across the East next week. That may hold the key as to how much rain may be released in the pattern reversal.
"It now looks like humidity levels will be slow to climb in much of the Northeast which should be enough to keep rain away from the upper mid-Atlantic through New England," Travis said.
Lingering moisture will set the stage for trouble in terms of downpours that repeat and raise the risk of flooding in part of the Southeast this weekend to at least part of next week.
Keep checking back on AccuWeather.com and stay tuned to the AccuWeather Network on DirecTV, Frontier and Verizon Fios.
Report a Typo
News / Weather Forecasts
Comfortable air to quell sweltering heat in Northeast, but with a caveat
By Alex Sosnowski, AccuWeather senior meteorologist
Published Jun 10, 2020 3:07 PM EST
A taste of the dog days of summer was felt across the northeastern United States as temperatures soared 10-15 degrees Fahrenheit above normal during the second week of June. Progressively cooler conditions will spread from the Great Lakes to the coast into this weekend.
An area of high pressure building over south-central Canada will create a flow of air from the northwest across the Midwest, New England and the central Appalachians -- and forecasters say the flow will draw in much more comfortable air.
High temperatures in the 80s to lower 90s from Wednesday will be but a memory with highs forecast to range from the middle 60s over the mountains and in northern New England to the lower 80s along the lower mid-Atlantic coast this weekend.
"Temperatures will swing to 5-15 degrees below average for the middle of June by this weekend," said AccuWeather Meteorologist Nicole LoBiondo.
During the middle of June, high temperatures average near 70 over northern New England to the middle 80s in the lower Chesapeake Bay region.
The cool press will come in two surges, according to AccuWeather Meteorologist Courtney Travis.
"One surge moved in during Thursday night, then the second and even cooler surge will take place from northwest to southeast over the region this weekend," Travis explained.
Unlike some blasts of chilly air that have occurred in recent weeks in the region, this cool push will not race hundreds of miles out to sea over the Atlantic.
Instead, the advance of cool air will slow and stall along the southern Atlantic and lower mid-Atlantic coasts late this week and this weekend.
An area of high pressure over the central Atlantic will fight back and pump humid air northwestward into the Southeast states through much of next week.
During June, the nearly stationary area of high pressure over the Atlantic, which can push warm and humid air back across the East, typically remains strong and is less likely to be shoved farther east like it can be during the spring months.
"At the same time you have the high pressure area building over the Atlantic, a dip in the jet stream will develop near the lower Great Lakes and the central Appalachians, which will work to keep temperatures suppressed much of next week in the East," Paul Pastelok, AccuWeather lead long-range forecaster, said.
Related:
AccuWeather forecasters will continue to monitor how far north humid air will be able to progress across the East next week. That may hold the key as to how much rain may be released in the pattern reversal.
"It now looks like humidity levels will be slow to climb in much of the Northeast which should be enough to keep rain away from the upper mid-Atlantic through New England," Travis said.
Lingering moisture will set the stage for trouble in terms of downpours that repeat and raise the risk of flooding in part of the Southeast this weekend to at least part of next week.
Keep checking back on AccuWeather.com and stay tuned to the AccuWeather Network on DirecTV, Frontier and Verizon Fios.
Report a Typo