General Information Date of ice-in on the main portion of Lake Champlain. Asterisks denote years in which the Lake remained ice-fee. Data from NWS (2012).Data Type: ObservedVariable Type: IceRegion: NortheastAssociated Report: Regional Climate Trends and Scenarios for the U.S. National Climate Assessment. Part 1. Climate of the Northeast U.S. Source Information Data Source(s): NOAA NWS Metadata Metadata File(s): metadata/Northeast/001TSU2013SCE1.011NE.html Files