Today an area of low pressure will develop well off the mid-Atlantic coast. Showers from this system will continue to overspread not only Maryland and parts of the Mid-Atlantic coast, but much of southeastern New England and Long Island.
The nor'easter will move slowly and close enough to the coast to bring coastal impacts like strong winds, rough surf, coastal flooding and heavy rain to the Eastern Seaboard.
There is a chance, albeit a low chance, the area of low pressure could develop into a subtropical depression or storm. Subtropical means that the storm has characteristics from both a tropical system and a low-pressure system you would find in higher latitudes.
Bottom line: Even if the storm doesn't get a name or if it remains non-tropical, the impacts from this system will most likely be the same. Also, another disturbance well off the Southeast coast will merge with the low in the Atlantic tonight.