" 'Sarvis Winter' is a cold snap that often arrives about
the time the small serviceberry tree -- usually the first in the deep woods to bloom -- is
showing its snow-white blossoms in late February and early March.
" The word 'sarvis' is a mountain name for the serviceberry, according to folklorist Alene Horner of Jeffersonville, Ind."
from The Courier-Journal, Metro, p1, "There's no need to panic, it's just Redbud Winter" by Bryon Crawford