The temperature will soar into the 90s in some places away from the coast on Wednesday afternoon. The heat will combine with high humidity to make it feel like the low 100s. The unseasonably warm and muggy weather will likely not spawn any thunderstorms in most of Southern New England on Wednesday. The exception may be in far western CT and MA late in the day or Wednesday evening.
While the air over Southeastern New England has great potential to produce severe thunderstorms, there will likely be no trigger in place to set the thunderstorms off. Sinking air will help to keep a cap on the chances of convection (thunderstorms) in Southern New England east of the Connecticut River Valley.
There is a better chance of thunderstorms late Thursday into early Friday in Southern New England as a cold front moves east sweeping away the very warm and muggy weather before the weekend arrives.