Cold temperatures and rain.
A deeper layer of cold air will move in early Friday morning with air temperatures higher in the atmosphere below freezing which will support a brief changeover to rain sleet and snow by early Friday morning. For communities on the North Shore, snow flurries are possible Friday, the National Weather Service predicts. Along that front, an area of low pressure continues to develop in the northwestern Gulf, and extensive precipitation extended from Texas into portions of Louisiana, southern Mississippi, Alabama, Georgia and the eastern Carolinas early Thursday.
Rainfall totals are still forecast to reach 2 to 3 inches across the entire area.
There is not much wind, but it is coming on from the ocean where water temperatures are 50, so rain is more likely than snow, but may end as snow. Some on the northern edge could see nothing at all, and others on the southern part could see all rain.
First Warning Forecast: Rain, Snow, And More Rain
North of 85, if things were to come together perfectly so that the period of coldest air and highest moisture were to overlap, it is possible to see a transition to snow. Rain and snow lines don't stop magically at county lines.
Rain, heavy at times, will continue through Friday. However, there is the chance for some small snow accumulations, mainly on grassy and elevated surfaces.
WDSU meteorologist Kweilyn Murphy said most areas will only see flurries with little if any accumulation; however, a few spots - especially on the northern boundary between Louisiana and MS - could see less than an inch of accumulation on grassy surfaces, rooftops and elevated surfaces, including roadways. I have spelled out the most likely scenario, but it's important to remember that there are multiple outcomes in play Thursday night and Friday.
IMPACT: Temperatures tomorrow morning will be in the 28- to 34-degree range; there could very well be icy travel, especially on bridges and overpasses, during the morning. Temperatures will drop to near 40 across the Pee Dee and into the lower 40s in the Grand Strand.