Hurricane Ian made its third and final landfall in South Carolina Friday afternoon before becoming a post-tropical cyclone. However, Ian’s rain will still impact us and it will do so in two waves: a coastal low that swings through tonight, and a second area of low pressure containing the remnant circulation of Ian, which moves through our region Sunday before swinging off the coast.
The first wave is tonight through the early morning hours Saturday. Heavy tropical downpours will lift through all night from south to north, delivering a general 1 to 2 inches of rain by early morning, with locally higher amounts possible near the coast. Winds will pick up as well, gusting over 30 mph at the shore and over 25 mph inland.
Once the rain moves out in the early morning, the majority of Saturday appears to be dry as a dry slot will set up between the two pieces of Ian. It’s still chilly and cloudy and very windy, but if you want to get outside without an umbrella, late Saturday looks like the best shot.
The second wave of low pressure will impact us Sunday, and even though the rain doesn’t look quite as intense, it’ll be more prolonged. Rain will fill in throughout the day and just get heavier as the afternoon progresses.
One thing to watch will be the potential for bands of heavy rain to set up Sunday night across South Jersey and Delaware as the low moves off the coast.
Some spots, mainly southeast of Philadelphia, could end up with a total of over 4 inches of rain before the storm is finished with us.
While the antecedent dry conditions mean the threat for flooding is relatively low and the rain is largely beneficial, if it falls too heavily for too long we could be looking at the potential for localized or flash flooding.
Coastal impacts will also increase throughout the weekend as the storm begins to shift offshore. Minor coastal flooding is possible through the weekend, and depending on the location of the low next week, could increase to moderate coastal flooding Monday — wouldn’t be surprised to see a Coastal Flood Warning issued in spots. A High Surf Advisory and High Rip Current Risk are also in the forecast this weekend — definitely not a good weekend to be in the ocean.
Ian’s remnants will finally relax their grip on our region by the middle of next week.