Confidence continues to increase for some sort of sub-tropical in nature storm system to develop along a stalled out frontal boundary off the coast of Florida and Georgia. With a strong area of high pressure it place towards New England, this will allow this system to intensify and move in towards the Carolina coastlines late Friday through Sunday.
Overspreading heavy rain, gusty winds, and coastal flooding are all expected this weekend. Especially on Saturday when the conditions are expected to be the worst out of this storm. Whether this storm will be tropical in nature or not, impacts are going to be felt like a stronger nor’easter we would see in the winter months.
Rain will begin to overspread the region beginning during the overnight hours on Friday and picking up in intensity on Saturday. Rain will be heavy at times with many operational and ensemble mean totals of 2-5 inches are expected over the weekend. With an area of high pressure to north, a strong pressure gradient will setup with constant strong onshore winds from the east and northeast. Sustained winds of 20-30 MPH with gusts 40-50 mph at times, will help generate waves offshore 10-20 feet. Near the coast, we are looking at swells generating 7-12 feet.
With some of the the tide gauge forecasts as of now showing areas along the Atlantic Ocean and Inland Bay regions for Minor to even Moderate coastal flooding during the high tide cycle Saturday afternoon. I worry for the Inland Bays a lot more with all the water being forced with no where to go given how big the swells will be with the strong long fetched onshore winds.
It’s pretty definitive at this point that we have a coastal storm on the way, it’s just a matter of how much rain will be associated with this system, and if it happens to be tropical or not. Or even a combination of both being a hybrid sub-tropical system. More details will be provided as the week goes on.