Temperature roller coaster to usher in much cooler air into start of June

By Brandon Buckingham, AccuWeather Meteorologist

Updated Jun. 1, 2020 2:10 AM

In the wake of a summerlike weather regime experienced across the Northeast over the past week, a dip in the jet stream will force cooler and less humid air southward from Canada through Monday.

For those that opted to turn on their air conditioning units amid the heat and humidity late last week, it will no longer be needed as cooler air filters in.

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The core of the cool air mass encompassed the entire Northeast on Sunday with high temperatures generally in the 60s and 70s F, or about 5-10 degrees below normal to close out May.

Mainly clear skies and light winds on Sunday night had temperatures dipping down to frosty and freezing levels in interior areas early Monday morning.

Temperatures will quickly rebound from the morning's low temperatures after sunrise on Monday, bringing an end to any plant-threatening conditions. Although the sunshine will rebound temperatures nicely into the afternoon, many locales will feature high temperatures on the order of 5-10 degrees below average to start out the month of June.

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Cool weather will persist into Monday night as well, but increasing cloud cover associated with an approaching disturbance will limit temperatures from falling as low as the night before.

Along with the continued trend of cool weather into the day on Tuesday across the Northeast, wet weather is expected to make a return as well as a system slides into the region. Rainfall is expected to remain on the lighter side, as this storm system will not have an ample amount of atmospheric energy to work with.

By the middle of the week, however, a more potent system is forecast to swing into the region with showers and heavy to locally severe thunderstorms.

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