Here in California we consider the snow accumulation in the Sierras to be over by April first.  The end of March also signals the end of Arctic Sea ice accumulation.  This year is shaping up to be a record low of the maximum sea ice extent.  I find this interesting because the four lowest(I think, just looking at the Charctic graph) on record occurred from 2015-2018.  Causation or correlation but that more or less lines up with the NE Pacific marine heat wave.  I think it would be interesting if this Spring the typical NW winds that create all the upwelling in CA fail to materialize and if that blob pops back up..... I know, lots of chickens vs. eggs in that statement but let me just say I'm not buying a new wetsuit this May.