The official start of summer was this weekend, and this week will be accompanied by decidedly summer-like weather. High temperatures for the first half of the week will be quite warm, in the mid-upper 80s, with some areas probably passing the 90º mark on Tuesday. Along with the summer-like temperatures, there will also be a chance for strong thunderstorms.

Rest of today – sunny skies will allow temperatures to rise up into the upper-80s and possibly 90 in the city. However, since humidity and dewpoints are low, it will not feel oppressively hot.

Tuesday – a cold front approaching from the west could serve as the trigger for some strong to potentially severe thunderstorms. Ahead of this cold front, continued southwesterly winds will maintain very warm temperatures in the upper-80s to low-90s in some parts. 

Timing of thunderstorms looks to be in the late afternoon, possibly around the PM rush, with a line of storms moving . Warm temperatures and a humid airmass look to yield moderate SBCAPE (surface-based convective available potential energy) values in the 2000-3000 J/Kg range. This environment should support intensification for any storms that form to marginally severe limits. Correspondingly, the Storm Prediction Center has placed most of the area in a slight risk area for severe weather tomorrow, except for eastern Long Island and Connecticut.

Wednesday – behind the cold front, things dry out and temperatures should cool off a bit, with high temperatures in the mid-80s.

Thursday – this will begin a period of unsettled weather that looks poised to persist through the weekend. The front that moves south of us Wednesday then stalls not too far, and remains nearly stationary starting Thursday. Several waves of low pressure are expected to move along this frontal boundary. While at this time, Thursday looks dry, cloud cover will be increasing and temperatures should be cooler, only around 80.