NYC Weather Update – June 8, 2021

Upper-80s heat and humidity will spawn scattered heavy rain and thunderstorms over the next couple of days. Low vertical wind shear and weak overall steering currents mean the primary threat from these storms will be possible localized flooding. A backdoor cold front drops in from Canada Wednesday night leading to much cooler temperatures Thursday in the low-80s. Rain and even cooler temperatures arrive Fri when we may only just hit 70ºF.

Rest of today – partly sunny with high temperatures in the upper-80s, and a muggy feel to the day. Scattered thunderstorms bring the potential for heavy downpours later in the evening, perhaps starting around 7PM. Overnight lows in the low-70s as showers roll through early.

HRRR simulated 1-kim radar valid for 8 PM tonight. An area of moderate to heavy rain accompanying some thunderstorms is depicted.

Wednesday – high temperatures again in the upper-80s. Mostly cloudy with yet another shot for some heavy downpours especially later in the afternoon as a cold front draws nearer. Overnight lows around 70ºF as a backdoor cold front eventually pushes through.

Thursday – with the backdoor cold front already south of us by Tuesday morning, high temperatures should cool off to around 80ºF. Chance for afternoon showers and thunderstorms. Overnight lows around 60ºF.

Weather Prediction Center surface forecast for valid 12 AM Thursday. A backdoor cold front is forecast to drop in from the north and east. The result will be a much cooler air mass than we’ve seen the beginning of this week.

Friday much cooler with persistent clouds and showers possible through the day, high temperatures perhaps only around 70ºF. Overnight lows around 60ºF with rain chances continuing.