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The National Weather Service upgraded a winter storm watch issued Thursday to a winter storm warning Friday, after weather models predicted a possible 14 inches of snowfall in the Hampton Roads region.
According to a NWS alert, the winter storm warning will remain in effect from 10 p.m. Friday to 10 p.m. Saturday. The areas affected by the storm include southeast Virginia and northeast North Carolina.
A weather model released by NWS at 4:41 a.m. Friday showed “most likely” snow accumulations of eight inches in the Williamsburg area during the 24-hour period of the storm.
According to the winter storm warning alert, snow is expected to begin midnight Friday and continue into Saturday afternoon, before ending Saturday evening.
A winter storm watch is upgraded to a winter storm warning when a “winter storm event” becomes likely and snowfall is expected to reach seven inches or more in 12 hours or less; or nine inches or more in 24 hours, according to NWS terminology.
A watch is generally issued during a 24- to 72-hour forecast period, when the risk of a hazardous winter weather event has increased to a 50 to 80 percent certainty of occurring.