Great Lakes water levels constitute one of the longest high quality hydrometeorological data sets in North America with reference gauge records beginning about 1860 with sporadic records back to the early 1800's. These levels are collected and archived by NOAA's National Ocean Service.

Each lake has one water level station that is designated as the master gauge, based on length of record and minimal relative vertical crustal movement. Current master gauge stations are shown on the map above and bolded on the lake-wide average table above.

Great Lakes water levels constitute one of the longest high quality hydrometeorological data sets in North America with reference gauge records beginning about 1860 with sporadic records back to the early 1800's. These levels are collected and archived by NOAA's National Ocean Service.

Water Levels & Hydrology. Great Lakes water levels are continuously monitored by U.S. and Canadian federal agencies in the region through a binational partnership. NOAA-GLERL relies on this water level data to conduct research on components of the regional water budget and to improve predictive models.

NOTICE: GLERL's Lake Mich-Huron model is not an operational product. All model output is provided as data of opportunity and should not be considered official NOAA forecast guidance.

(Click a lake on the map to view model output) GLCFS NOWCAST/FORECAST - Experimental. FVCOM ICE HRRR* Water Temperature: Concentration: Wind: Surface Currents: Thickness: Air Temp: Water Level: Velocity: MSLP: See also: NCEP WaveWatch III Output . Heat Flux Estimates: Whole-Lake Heat Fluxes and Evap: About the …

The Great Lakes Surface Environmental Analysis (GLSEA) is a digital map of the Great Lakes surface water temperature and ice cover which is produced daily.

NOAAPORT Realtime Weather Data and Marine Observations for the Great Lakes region are acquired by the NOAA CoastWatch Great Lakes node via satellite at hourly intervals

The Great Lakes Surface Environmental Analysis (GLSEA) is a digital map of the Great Lakes surface water temperature and ice cover which is produced daily.

To view live data, click on a lake in the map to jump to realtime data for that lake, or click on a data type or an individual station below to jump to realtime obs for that data type or station. See also