The February full moon is known as the Storm Moon. In my random, pre-article web poking, I discovered that Storm Moon is not the most popular name for this Esbat. The most common name appears to be the Quickening Moon.
This name is associated with the season of Imbolc and the quickenings of new life – in animals and in the earth Herself. The first signs of spring are starting to appear, and we use this moon to work our fertility or growing magics.
The other more popular name is Snow Moon. This is likely due to the fact that in much of North America, more snow tends to fall in February than in any other winter month.