High Winds May Cut Power DC, NYC, Albany to Boston

By , AccuWeather.com Senior Meteorologist
September 18, 2012; 5:10 AM ET
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Strong south to southeast winds will cause trouble from New Jersey and eastern New York to much of New England and neighboring Canada.

Gusts between 50 and 60 mph (80 to 100 kph) combined with the state of foliage and wet ground will lead to incidents of downed trees through Tuesday night.

Drenching rain accompanying the wind at times will add to the weight on trees and tree limbs.

As trees and tree limbs come down, some secondary roadways may become blocked, homes and businesses could be damaged and sporadic power outages may occur.

People should avoid walking in wooded areas late today into tonight, because of the risk of falling limbs.

A strong flow of moisture from the Gulf of Mexico and the Atlantic Ocean will be harnessed by an approaching cold front and a storm system moving along that front.

Winds will be the strongest along the coast, over ridges, through gaps in the mountains and between and over the tops of buildings.

The strong onshore flow can also lead to coastal flooding and overwash in south- and southeast-facing areas, especially during times of high tide through tonight.

The difference in pressure between the storm and front approaching (low pressure) and a fair weather system offshore (high pressure) will generate a strong flow of air.

As winds become aligned at the surface and aloft, the stronger winds from aloft will make their way down to the surface, in the form of powerful gusts.

As the cold front swings through from west to east early Wednesday, the alignment for strong winds will diminish and the rain will end, but cooler air will sweep in.

The same storm and frontal system are also bringing the potential for flash and urban flooding, as well as locally severe thunderstorms to the eastern United States Tuesday.

Keep ahead of the storm with AccuWeather Professional radar- includes hail potential radar, storm top radar, vertical cross-section showing wind heights and speed- and more!

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