On this afternoon's weather map, a stationary front is draped from the lower Great Lakes east through the southern Jersey shore. The remnants of “Isaac” are located over the southern Ohio Valley. Over the next 24-48 hours, the stationary front will dissolve and fall apart as the remnant low moves northeast to a position near Binghamton by early Wednesday.
Persistent south to southeast winds ahead of the low will import humid air into Central New York today and tonight. And while this may help trigger an odd shower or thunderstorm today, a greater chance for showers and thunderstorms will be with us tomorrow and tomorrow night as the low closes in on the region. With humidity levels on the increase, we’ll need to consider the threat for heavy rain and/or downpours.
As the low moves east of the region Wednesday, showers will come to an end. Winds will also shift into the northeast and northwest which will bring drier air into the region. Consequently, we should find improving weather Wednesday afternoon. Another system, a cold front, is forecast to arrive late Thursday. Ahead of the cold front, a surge of warm air will move into Central New York. As the cold front arrives, with the warm air in place, scattered showers and thunderstorms are possible.
Right now, early indications point to a threat for scattered showers and thunderstorms, especially Sunday. However, as of now we don’t see any washout type rainfall.