Around this area, we usually see the temperatures rise a bit - just enough to tease us into thinking Spring is coming. The temps tease the plants too, like the daffodils and especially the spring onions that you'd find growing in your yard or fields. They start growing and then....we usually get one last snow of an inch or two that lays on the ground (not just a flurry) and disappears quickly as the temps warm up again.
It's called the onion snow because it's usually the very last snow but it happens after the spring onions have already sprouted and are showing a good bit of green above the ground.