As per the National Weather Service:
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Synopsis:
The potential for strong thunderstorms will impact the NYC area this afternoon.� The Storm Prediction Center in Norman Oklahoma has placed the entire tri-state area under moderate risk for severe weather. With high air temperatures and dew point, convection will produce thunderstorms along a passing cold front beginning at 1:00 PM until early evening.� These thunderstorms could produce strong winds, large hail, localized nuisance flooding, and cloud-to-ground lightning.� There is a low potential for tornado development.� Convection will weaken at sundown with lingering showers overnight.
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Precipitation:
Total rainfall expected is 0.25-0.50 inches.� Higher totals could be seen with stronger thunderstorms.� Rainfall rates are not expected to exceed 1.0 inches per hour, but higher rates should be expected with the stronger thunderstorms for less than one hour.� Small-to-large hail is possible with any strong thunderstorm cells.��
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Winds:
Sustained winds 10-20 MPH, with gusts in excess of 25 MPH, are forecasted for this afternoon.� Depending on the severity of individual thunderstorm cells, potential winds gusts could exceed 58 MPH.
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Urban Flooding:
Localized nuisance flooding can be expected with the stronger thunderstorms.
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Coastal Flooding:
No coastal flooding forecasted by the NWS.

(YWN Desk – NYC)