April-Like Chill to Spread From Philly to DC

By , Expert Senior Meteorologist
May 29, 2014; 4:38 AM ET
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Play video AccuWeather experts Evan Myers and Elliot Abrams discuss the Northeast weather in detail in this video.

Temperatures more appropriate for April will continue to spread over the mid-Atlantic into Thursday, following Memorial Day warmth.

A push of cool air with low clouds from eastern Canada will continue to advance slowly southwestward.

In the wake of the cool push, known as a back door front, temperatures will be slashed by 15 to 30 degrees F in many cases, when compared to their 80-degree-plus levels from Memorial Day.

The warm air never made it in to northern New England on Memorial Day, but the people from Maine to eastern Massachusetts already felt the cool push by Tuesday. After a high near 80 F, temperatures were hovered in the lower 50s in Boston Tuesday afternoon and lingered in the upper 40s Wednesday afternoon.

The warmest part of Wednesday around New York City occurred at midnight, when temperatures were in the middle 70s. Temperatures struggle to reach back to the lower 60s during the afternoon, after dipping into the 50s through midday Wednesday.

The cooler air reached Philadelphia during the midday hours. Temperatures much of the day Wednesday remained in the 60s.

Washington, D.C., will feel the effects of the cool air on Thursday with temperatures forecast to be no higher than the 60s during the day.

Areas right along the coast will experience a breeze from the east and northeast that will add to the chill.

During the transition to cooler weather at midweek, moisture spilling northward from the Gulf of Mexico will lead to multiple showers and thunderstorms.

Once the transition has occurred, the threat for gusty thunderstorms will have diminished. In many cases, the cool air will be accompanied by low clouds and areas of fog.

The advance of the cool air will slow and stall across Virginia and North Carolina. Much of West Virginia will remain in a warm air mass through the week.

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After temperatures take the plunge, cool air is forecast to linger through the coming weekend in New England but recover farther south in the mid-Atlantic. Highs by this coming Saturday are projected to be in the 60s in Boston, in the 70s in New York City and in near 80 F in Washington, D.C.

Indications are that the pattern of cool air making frequent visits to the Northeast may continue in the weeks ahead.

According to AccuWeather Long Range Meteorologist Mark Paquette, "Through the first part of the summer, the Northeast, especially Boston and New York City, are unlikely to have long-lasting heat."

The jet stream, a river of high-speed air well above the ground, will continue to dip southward over the Northeastern states.

"We expect only brief episodes of heat or above-average warmth through much of June and perhaps a while longer in the Northeast," Paquette said.

"The warm surges would only occur right ahead of the next push of cool air in the Northeast, but warmth would be longer lasting and more persistent farther south over the mid-Atlantic, around Washington, D.C."

During early July, high temperatures typically range from near 80 F around Boston to the middle 80s around New York City and Washington, D.C.

On a warmer note, even if cool air continues to make invasions into the region during early July, temperature dips may only translate to highs in the 70s across coastal New England and the lower 80s farther south in the mid-Atlantic with a few exceptions.

The AccuWeather long range team expects August to bring more persistent, stronger heat to the Northeast.


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