Another moisture-loaded storm system will impact the area over the next 24 hours, bringing us another round of soaking rain and possibly some flooding.
Low pressure is organizing over the southeastern United States this morning and will lift northward up the Appalachians tonight and Saturday, passing over or west of New England Saturday night. The storm will deepen considerably on its journey northward, eventually becoming a powerful storm over Eastern Canada by Sunday.
The system, fueled by warm, moist air from the Gulf of Mexico, a potent mid-level disturbance and a strong jet stream, will transport a large area of heavy precipitation up the Eastern Seaboard today, tonight and Saturday.
Model guidance is in good agreement on a widespread, soaking rain across the region. The “euro” ensemble (EPS) odds for greater than 1″ of precipitation are over 90 percent for just about all of Southern New England and multiple pieces of guidance are pumping out 1.5 to 2.5 inches of rainfall in localized areas.
With that in mind, and considering we just picked up 2.5 to 3.5 inches of rain earlier in the week, followed by a couple of inches of snowfall on Wednesday, it’s certainly possible that there will be some pockets of street flooding and basement flooding developing around the area. If downpours manage to train over any given area and rainfall totals approach 3 inches (lower probability but not out of the question) urban/street/basement-type flooding in vulnerable areas would be likely and a bit problematic.