NYC Weather Update – Dec 7, 2020

A week of contrasts is in store for us with colder than average temps in the low-40s to start things off. However, a warming trend will take hold as a more zonal flow evolves at the upper levels, moderating heights and temperatures. This will result in milder conditions later on in the low-50s.High pressure and dry northerly flow should keep things rain-free until closer to the weekend.

Rest of today – below normal high temperatures around 40ºF with increasing clouds as a low pressure center passes well off to our southeast over the Atlantic. The presence of this storm offshore will result in persistent northerly winds, though less potent than over the weekend. Overnight lows in the low-30s.

Weather Prediction Center surface forecast for 7PM Monday. Note the presence of a low pressure center east of North Carolina.

Tuesday – high pressure briefly builds in and provides a mostly sunny day but with temperatures still only peaking around 40ºF. Overnight lows again in the low-30s.

Wednesday – high temperature start to rebound towards normal in the mid-40s with partly sunny skies as a storm passes well to our north, and we end up in the storm’s warm sector. Overnight lows drop into the upper-30s.

GFS model 500 mb temperature, height and winds forecast for 1PM Thursday. Flow at this level is forecast to become more zonal (flatter) than earlier this week.

Thursday temperatures jump into the low-50s with sunny skies as high pressure briefly moves in again and upper level flow starts to flatten out resulting in the colder air mass in place to start the week getting pushed north. Overnight lows in upper-30s.

Leave a Reply

Your email address will not be published. Required fields are marked *