Temp Drop, T-Storms: Hudson Valley Forecast

HUDSON VALLEY, NY — Thunderstorms are expected intermittently this week, as are temperatures 20 degrees lower than Monday.

"Big changes are in store for the Hudson Valley on Tuesday," Bill Potter of Hudson Valley Weather said on Facebook.

The National Weather Service warns of wind and hail along the Sound Shore.

Yes, our regional heat bump is over, temporarily.

A layer of cool, dense air in the lower part of the atmosphere will act as a wall separating us from the people sweltering in Pennsylvania, Maryland and Virginia.

"This boundary separating temperatures in the 50s and 60s from readings in the 70s, 80s and near 90 will extend from northern New York to the Hudson Valley southward to the immediate coast of the mid-Atlantic," said Alex Sosnowski, AccuWeather senior meteorologist.

The heavy, gusty thunderstorms expected in the northern and western suburbs of New York City on Tuesday are the edge of a system of storms from the Midwest, Sosnowski said.

"The most significant weather with the potential thunderstorms this evening would be heavy downpours," Bruce Furbeck of First Due Weather said on Facebook.

Then, after a lull Wednesday and Thursday, the potential for more downpours and gusty thunderstorms will increase, Sosnowski said.

Here's the five-day forecast based on southern Westchester County:

• Tuesday - Mostly cloudy. Much cooler with highs in the lower 60s. East winds around 10 mph. Gusts up to 20 mph this afternoon.
• Tonight - Cloudy with a 50 percent chance of showers. Lows around 50. Northeast winds 5 to 10 mph. Gusts up to 20 mph in the evening.
• Wednesday - Mostly cloudy with a chance of showers in the morning, then mostly sunny in the afternoon. Highs in the upper 60s. East winds around 5 mph. Chance of rain 30 percent.
• Wednesday Night - Partly cloudy in the evening, then becoming mostly cloudy. Lows in the upper 40s. Southeast winds 5 to 10 mph.
• Thursday - Mostly sunny. Highs in the lower 70s. South winds 5 to 10 mph.
• Thursday Night - Partly cloudy. Lows in the lower 50s.
• Friday - Partly sunny. Highs in the upper 60s.
• Friday Night - Mostly cloudy. Lows in the upper 40s.
• Saturday - Partly sunny. A chance of showers in the afternoon. Highs in the lower 60s. Chance of rain 30 percent.
• Saturday Night - Mostly cloudy with a 40 percent chance of showers. Lows in the upper 40s.