Don't forget, I'm in the east, about 2 hours drive from the coast. And until recently I was a bit further south, near Greenville NC formerly.
Ok, about the first of March for warming trend. It can be in the seventy's then. But the largest snow in my life started on March 1, 1980.
Normally only a couple of dustings and one real snow event a season in the east. But it seems (perhaps impression only) to becoming more. In the last six years since I moved, here at least we've had a couple of inches or more twice or more every year. And other days, normally only 24 hours to 48 hours, of sleet, freezing rain, snow/rain mix. Most stuff melts around here in only 2 to 3 days. Occasionally it may last a week.
But there are two often referred to dividing hiways for weather reference. One, west of Interstate 95 is much more snow and ice. Two, in the east, west of highway US 17 normally has more than east.
Now some of our largest snows are opposite, actually move up the coast as Gulf moist air rides up over existing cold air mass.
Raleigh has a lot more than we do in the east. Probably Bill could give you a much better idea.