Melanie , I was thinking the Black bands , (the larger they are the more snow , )
Like the dark bands on the moss around trees 7 to 10 days before it will show the snowfall depth ,
about 70 to 80 % of the time here , these things seem to be true . The year about 2000 , we kept finding all light brown wooly bears , we had two small snowfalls a medium snowfall , For February through April , all rain , no snow that year ,
Scientists
Folklore
Thought you might like that , as to about how folklore happens
I forgot ,The first Bear larvae showed a mild average winter for here , the second showed mild as the one black band is nearly not there , lot of light brown