Ingredients are coming together for a significant coastal storm in the Mid-Atlantic region as we begin the Mother’s Day weekend and it is likely to bring a soaking rain to the DC-to-Philly-to-NYC corridor from late Friday into late Saturday.
On Friday, an upper-level wave of energy will push to the northeast from the Tennessee Valley and low pressure will begin to intensify at the surface. This system will begin to phase with a northern stream upper-level low on Friday night and Saturday the end result is likely to be quite a storm by late Saturday along the Mid-Atlantic coastline.
A soaking rain will result from the coastal storm and there can be some rain ahead of the storm in parts of the Mid-Atlantic region from Thursday into Friday; especially, south of the PA/MD border. By the time the weekend comes to an end, 2+ inches of rainfall is likely to accumulate in the DC-to-Philly-to-NYC corridor.
The strong coastal low is most likely going to move into New England by Sunday and there will be improvement around here for Mother’s Day, but a shower or two cannot be ruled out and it’ll stay on the cool side of normal. There are prospects, however, for much warmer weather conditions around here during the second half of next week.
Meteorologist Paul Dorian