Another alternative is to get some "over mittens" to wear over your winter gloves. These keep the wind/rain/snow off of your gloves to start with. Aerostich has 2 kinds, for $47 & $57.
http://www.aerostich.com/catalog/US/Rain-Glove-Covers-p-1-c-443.htmlI got the thinner kind, so they roll up small, to keep in saddle bags. The heavier ones will probably be very bulky, but probably much warmer also. The weather here in Alabama is not very extreme, usually not less than 30 deg F in the daytime in the winter. --Tom