Happens quite often in snowy spells, either the snow misses this area completely or it melts a lot quicker down here. I bet on a satellite image now from south of the mendips there will be a big green blob.
I enjoyed the snow that was here but I'm starting to look for something warmer and drier, I'm most definitely a summer person. I really don't want to face another cool wet summer again and its impact on the insect life. We could do with a warm dry year to aid recovery of the bees and butterflies.