Can't believe we're talking about frost/freeze potential in May. Usually we're moving towards summer temps/humidity.
From RAH:
The main headline of the late week weather story continues to be the much
cooler than normal temperatures, with afternoon highs expected to
struggle to reach 70 degrees Sat/Sun. Model forecast guidance,
especially the ECMWF, continues to hint at 1000 - 850mb thickness
values dipping to near 1300m by Sunday morning. Based on past local
research, this will favor temperatures generally in the lower 30s
under good radiational cooling conditions at KGSO. Even cheating up
a few degrees based on climatology/seasonality, this would put quite
a large portion of central NC in a Frost/soft Freeze type threat pre-
dawn Sunday. If KRDU were to hit the freezing point (which is
unlikely at this point) this would tie the latest freeze in its
period of record.