Data are preliminary. Provides preliminary water levels for each NOS station every six minutes. Data are provisional. Data are preliminary. Period of record is 1918-1996.
Data are preliminary.
This page was created under the guidance of the binational Coordinating Committee on Great Lakes Basic Hydraulic and Hydrologic Data . This symbol is used throughout the GLIN hydrology section to indicate data or references prepared under the auspices of the Coordinating Committee.