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Long Island weather: Severe thunderstorms, possible flooding overnight

A severe thunderstorm watch is in place for Long Island through 10 p.m., with high winds a major threat, News 12 Long Island meteorologist Geoff Bansen said Wednesday. (Credit: News 12 Long Island)

The National Weather Service issued a flash flood watch late Wednesday night through 5 a.m.Thursday for much of Long Island after a line of strong thunderstorms dumped nearly 3 inches of rain on the region earlier in the evening.

A flash flood warning was expected to continue through at least 1 a.m. Thursday.  The weather service's Upton office cautioned drivers to avoid flooded roads and predicted between 1 and 2 inches of additional rain through the early morning.

Sporadic power outages were reported by PSEG Long Island late Wednesday night with lightning strikes knocking out electricity in parts of Huntington, according to the utility's website. A total of 5,431, PSEG Long Island customers were without power just before midnight but it was unknown how many lost electricity because of the weather.

PSEG Long Island crews were dispatched to several locations with power expected to be restored sometime overnight, according to the utility's website. 

The storms come courtesy of the remnants of Hurricane Barry, forecasters said.

And, as a reminder — all thunderstorms produce lightning.

“If you hear thunder, you are close enough to be struck,” the weather service said.

Showers and thunderstorms are predicted off and before noon Thursday and possibly continuing through 3 p.m. with a chance of showers afterward.

Next up? A potential heat wave starting Friday, when hazy, hot and humid conditions are expected, with the temperature as hot as around 100 degrees. 

"Excessive heat and humidity are becoming increasingly likely on Saturday, and possibly again on Sunday with high temperatures ranging from the mid-90s to around 100, along with maximum heat index values between 105 and 110," the weather service said.

A heat wave occurs when the temperature reaches at least 90 degrees for three consecutive days.


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