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.

Data and Resources

Additional Info

Field Value
Maintainer Earthdata Forum
Last Updated August 24, 2026, 22:05 (UTC)
Created April 1, 2025, 16:31 (UTC)
accessLevel public
bureauCode {026:00}
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
harvest_object_id 72173f28-c585-41c9-b966-5e231ebbdb11
harvest_source_id b99e41c6-fe79-4c19-bbc3-9b6c8111bfac
harvest_source_title Science Discovery Engine
identifier 10.7265/N5H41PBV
license https://www.usa.gov/government-works
modified 2026-08-17T22:16:01Z
programCode {026:000}
publisher NSIDC
resource-type Dataset
source_datajson_identifier true
source_hash 79a122f9c0e981c81d29ccbce2f84d8b61958440eeb500ceeb7a86ecfabbe4bf
source_schema_version 1.1
spatial ["CARTESIAN", [{"WestBoundingCoordinate": -93.0, "NorthBoundingCoordinate": 49.0, "EastBoundingCoordinate": -79.0, "SouthBoundingCoordinate": 41.0}]]
temporal 1973-12-01/2002-05-09
theme {"Earth Science"}