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More heavy rain expected in the Northeast on Wednesday

A complex storm system will continue its evolution throughout the United States from later Tuesday into Wednesday. The first round shifted northeast of the Mid Atlantic this evening, moving towards Southern New England. A strong low level jet associated with this system aided in the development of widespread heavy rain, with many areas receiving well over 1″ of rainfall by the time the system ended.

Another disturbance, embedded within the same storm system, will approach the Northeast US on Wednesday. Ahead of its arrival, southwest winds will commence and warm, moist air will push northeast late Tuesday Night into Wednesday ahead of a warm front. This will allow some areas of dense fog to develop during the overnight period and into the morning hours of Wednesday.

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Tuesday Overview: Dreary, rainy conditions continue

A complex and large storm system sprawled across the United States will continue to affect the area for the remainder of the day today. Periods of heavy rain are likely to continue, especially across parts of Long Island and Connecticut as the evening goes on. The area should see a gradual drying trend by this evening as this first disturbance moves away.

Another one is right on its heels, however — and although things will feel a bit warmer on Wednesday, they will also be more humid and more unsettled. Heavy rain with embedded thunderstorms will again be possible Wednesday afternoon and evening before a cold front clears the area Thursday morning. Here are some weather highlights. As always, sign up for Premium to get detailed posts, videos, and more! 

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Multiple rounds of heavy rain likely in the Northeast this week

An expansive and multi-faceted storm system will develop throughout the United States during the early and middle part of the upcoming week. Multiple pieces of energy will move from the Plains through the Mississippi and Ohio Valley’s and eventually towards the Northeast — each disturbance aiding in the development of heavy rain over a relatively large area. While wintry precipitation and severe weather are both possible in the Central United States, the main focus in the Northeast will be periods of heavy rain — much needed in many areas.

While uncertainty does exist given the multiple disturbances and intricate interactions between fronts, confidence has increased in the heavy rain threat over the past 24 to 48 hours. Forecast model and ensemble guidance has come into much better agreement on the storms overall evolution, with two separate rounds of rainfall likely in the Northeast US from Tuesday through Thursday.

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Heavy rainfall possible in the East next week

A significant storm system is expected to evolve throughout a large majority of the United States over the next several days — with heavy rainfall impacts possible throughout the Eastern US by the middle part of next week. Much of this would come as good news to the drought-ridden areas of the Eastern US, but the uncertainties in regards to the storm systems exact evolution make forecasting the system extremely difficult. Intricate processes at work will determine exactly where and when the heavy rainfall occurs.

The storm system forms initially over the next 48 hours as a strong disturbance evolves into the Plains states. A strong low pressure system at the surface develops rapidly northward into the Dakotas. Precipitation will spread eastwards towards the Corn Belt by early Monday morning as a front boundary surges eastward. But this initial disturbance is not the only feature of interest. While significant aloft, a second disturbance will move through the Rocky Mountain range during the early part of the week, eventually interacting with the initial storm.

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