Data Set ID: 

Great Lakes Ice Charts, Version 1

These charts show ice extent and concentration three times weekly during the ice season, for all lakes except Ontario, from the 1973/74 ice season through the 2001/2002 ice season. Most charts are annotated to indicate data sources. The Straits of Mackinac, Green Bay, and Sault Ste. Marie are enlarged as insets; and in some cases, provided as separate charts. From 1973/74 through 1986/87, charts were prepared by the National Weather Service Forecast Office in Ann Arbor, Michigan. Beginning with the 1987/88 season, the National Ice Center (formerly known as the Navy/NOAA Joint Ice Center) in Suitland, Maryland prepared the charts. Charts are available as GIF files.

This is the most recent version of these data.

  • Snow/Ice > Ice Extent > ICE EXTENT
  • Snow/Ice > Lake Ice > LAKE ICE
  • Snow/Ice > River Ice > RIVER ICE
Data Format(s):
  • GIF
Spatial Coverage:
N: 49, 
S: 41, 
E: -79, 
W: -93
Spatial Resolution:
  • Varies
Temporal Coverage:
  • 1 December 1973 to 9 May 2002
Temporal Resolution2 dayMetadata XML:View Metadata Record
Data Contributor(s):National Snow & Ice Data Center, .

Geographic Coverage

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As a condition of using these data, you must cite the use of this data set using the following citation. For more information, see our Use and Copyright Web page.

National Snow & Ice Data Center, . 2004. Great Lakes Ice Charts, Version 1. [Indicate subset used]. Boulder, Colorado USA. NSIDC: National Snow and Ice Data Center. doi: [Date Accessed].

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