meltoff

noun2

1. •
   The melting of snowpack at the end of winter.

   • In years of late meltoff, ground squirrels emerge and burrow up through the snow with little difficulty. — 2013
2. •
   The water produced by the melting of the snowpack.

   • The snowpack deepens as long as accumulation exceeds meltoff , usually until mid-March. — 2000