NYC Weather Update – Jul 20, 2021

A brief warmup Tuesday as highs rise into the upper-80s to near 90ºF before a cold front swings through Wednesday bringing showers and thunderstorms. Seasonable and drier conditions behind the front in the mid-80s to end off the week with plenty of sun.

Rest of today – mostly sunny with high pressure briefly building and temperatures rising to 90ºF. Overnight lows dropping into the low-70s.

Weather Prediction Center surface forecast for 8 AM Wednesday, a cold front will be approaching from the north and west.

Wednesday – partly cloud with a cold front crossing the region during the day. High temperatures in the mid to upper 80s. Showers and thunderstorms possible in the evening. Overnight lows in the upper-60s.

Thursday – drier, cooler, with high temperatures in the mid-80s and mostly sunny skies. Overnight lows in the upper-60s.

GFS 500 mb temperature, height, and wind for Friday at 8 AM. Heights will drop around a closed low centered over the Canadian Maritimes, leading to seasonable temperatures. Some of the energy rotating around this low could bring scattered showers and thunderstorms to the area.

Friday high temperatures again in the mid-80s with partly cloudy skies and chance of showers and thunderstorms. Overnight lows in the upper-60s.