A strong low pressure system will track across the southeast U.S. this weekend and will likely have significant impacts for South Carolina on Sunday. Widespread heavy rain, strong winds, and isolated severe weather are the main threats for this mid-December storm.
The wind and rain will begin to increase Saturday night with the highest impacts expected Sunday morning through the late evening hours. Most locations will average 2-5" of rain but local amounts over 7" are possible, so flooding will be a big concern. In response, forecasters at the Weather Prediction Center have classified most of the state under a marginal (level 1 out of 4) or slight (level 2 out of 4) risk for flash flooding this weekend. Motorists are urged to avoid water-covered roadways and adjust travel plans as necessary.
The strongest winds will be located near the center of the storm's circulation that is now forecasted to be closer to the coastline. Sustained winds of 20-40 mph are possible with gusts in the 45-55 mph range. Rough surf and high rip current risks will continue well past sunset Sunday. A Gale Watch and Small Craft Advisories are posted for all coastal and offshore locations.
Winds of this magnitude are capable of structural damage, downed trees or tree limbs, and power outages. Of course, plan on taking any necessary precautions with your holiday decorations as well.
The highest risk for severe weather will also be closer to the system's central path near the coast. Straight-line winds over 60 mph are possible along with a threat for isolated tornadoes.
Conditions will slowly improve Sunday night into Monday morning, but expect very chilly and breezy conditions behind this storm well into next week.