Historical Ice Breakup Dates for Chequamegon Bay, Lake Superior, 1911 to 2020 (ver. 3.0, June 2020)

Ice breakup dates of Chequamegon Bay, Lake Superior from 1911 to 2020 were compiled by Lori Evrard (USGS, GLSC, Lake Superior Biological Station, Ashland, WI). Ice breakup date is the day in spring when winter ice cover substantially leaves a water body. Local residents deem "ice breakup" as when the ice moves northeast of a line straight across Chequamegon Bay out from Ellis Avenue (State highway 13). Another way ice breakup was determined has been if you could drive a boat from the outlet of Fish Creek to Houghton Point. The ice may move back and forth over that line but the ice is breaking up, moving and melting from that date on. Ellis Avenue ends on a bluff (46.5925 degrees North, 90.8827 degrees West) that provides a clear view of Chequamegon Bay from Fish Creek to Houghton Point. Mrs. C. J. Hoskings recorded the dates from 1911 to 1980. Mr. LeRoy C. Margenau recorded the dates from 1981 to 1991. The Ashland Marina recorded the dates from 1992-1999 and 2001. Lori Evrard (USGS) recorded dates after 1999 except 2001. USGS converted the dates to Julian dates. The date of ice breakup will be updated annually to append that year's date.

Data e Risorse

Campo Valore
accessLevel public
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catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
identifier USGS:5ea184c282cefae35a16e155
metadata_type geospatial
modified 20200820
old-spatial -90.9544, 46.5815, -90.7031, 46.7319
publisher U.S. Geological Survey
publisher_hierarchy Department of the Interior > U.S. Geological Survey
resource-type Dataset
source_datajson_identifier true
source_hash ed332df6aca1d74972d274595a7f71268434bb5e
source_schema_version 1.1
spatial {"type": "Polygon", "coordinates": [[[-90.9544, 46.5815], [-90.9544, 46.7319], [ -90.7031, 46.7319], [ -90.7031, 46.5815], [-90.9544, 46.5815]]]}
theme {geospatial}
Gruppi
  • AmeriGEOSS
  • National Provider
  • North America
Tag
  • amerigeo
  • amerigeoss
  • ashland
  • bays
  • chequamegon-bay
  • ckan
  • climatologymeteorologyatmosphere
  • geo
  • geoss
  • great-lakes
  • lake-ice
  • lake-superior
  • national
  • north-america
  • united-states
  • usgs-5ea184c282cefae35a16e155
isopen False
license_id notspecified
license_title License not specified
maintainer Lori Evrard
maintainer_email levrard@gmail.com
metadata_created 2025-11-21T09:25:35.969269
metadata_modified 2025-11-21T09:25:35.969273
notes Ice breakup dates of Chequamegon Bay, Lake Superior from 1911 to 2020 were compiled by Lori Evrard (USGS, GLSC, Lake Superior Biological Station, Ashland, WI). Ice breakup date is the day in spring when winter ice cover substantially leaves a water body. Local residents deem "ice breakup" as when the ice moves northeast of a line straight across Chequamegon Bay out from Ellis Avenue (State highway 13). Another way ice breakup was determined has been if you could drive a boat from the outlet of Fish Creek to Houghton Point. The ice may move back and forth over that line but the ice is breaking up, moving and melting from that date on. Ellis Avenue ends on a bluff (46.5925 degrees North, 90.8827 degrees West) that provides a clear view of Chequamegon Bay from Fish Creek to Houghton Point. Mrs. C. J. Hoskings recorded the dates from 1911 to 1980. Mr. LeRoy C. Margenau recorded the dates from 1981 to 1991. The Ashland Marina recorded the dates from 1992-1999 and 2001. Lori Evrard (USGS) recorded dates after 1999 except 2001. USGS converted the dates to Julian dates. The date of ice breakup will be updated annually to append that year's date.
num_resources 2
num_tags 16
title Historical Ice Breakup Dates for Chequamegon Bay, Lake Superior, 1911 to 2020 (ver. 3.0, June 2020)