A warmer air mass will start to move into the area tomorrow. As a result, temperatures will warm up, reaching the mid to upper 80s inland, upper 80s to lower 90s in the immediate NYC area, and mostly in the mid 80s further east due to a south wind.
There is the potential for a MCS (Mesoscale Convective System) to move into the area tomorrow night. Forecasting MCS type events can be very difficult, but the potential is there for one to affect the region, and if one does reach the area, it would be capable of bringing heavy rain and gusty winds. More information on this will be posted tomorrow.