You will need to contact the manufacturer of your canopy for their suggestions. We do carry snow load rated shelters, the
ShelterTube shelters by ShelterLogic. These are available in both gray and green in sizes of 12 x 20 x 11, 12 x 25 x 11 and 12 x 30 x 11. They can resist winds up to 80 mph and snow/ground loads of 43 pounds per square foot (when used correctly).