LA CROSSE, Wis. (AP) – Parts of Wisconsin are getting a reminder that March can deliver a variety of weather conditions.  Heavy snow is falling in southwestern Wisconsin after a weekend of rainy, spring-like weather. The National Weather Service has posted a winter storm warning for a region that includes La Crosse, Sparta and Tomah.  Some schools have delayed the start of classes Monday by two hours, including Spring Grove, Black River Falls, Sparta and Blair-Taylor.        Forecasters say 5 inches to 9 inches is expected to accumulate by the time the storm moves on later Monday.