Data Access

Buoy on Lake MichiganDisclaimer: All products published on this website are prototype products and are not intended to be used for navigational or operational purposes. Due to atmospheric or other conditions, latest data may not always be available. View the full disclaimer.


Data Portal

The GLOS Data Portal provides access to near-realtime and archived observations and to model forecasts for the Great Lakes. This includes lake conditions, water levels, wave heights, air and water temperatures and more. Receive updates from the station or buoy of your choice, and even download data from the site.

  • Provides an overview of instrumentation.
  • Provides a summary of recent observations.
  • Is map- and chart-oriented, and is aimed at a broad, general audience.
  • Presents satellite data and model forecasts in a user-friendly way.
  • Provides access to STORET and other non-realtime data.                                                                                                                                                  

> Go to the Data Portal Launch Page


Harmful Algal Bloom Data Viewer

The HABs Data Viewer provides convenient access to data used to monitor conditions and to alert those making decisions regarding harmful algal blooms and water treatment.

> Go to the HABs Data Viewer launch page


Huron to Erie Connecting Waterways Forecasting System

The Huron to Erie Connecting Waterways Forecasting System provides predicted forecasts of water levels and currents through the Huron to Erie Corridor. The tool has varying applications, which include guiding spill response, aiding search and rescue efforts, beach health management, and finding the source of fish kills, among others. Features include:

Nowcasts every three hours and forecasts every 12 hours for currents and water level for St. Clair River, Lake St. Clair, and Detroit River
Output via web-interface

> Go to the Huron to Erie Connecting Waterways Forecasting System Launch Page


Great Lakes Model Inventory

The Model Inventory allows users to search for models, applications, people, and organizations that address ecosystem health, marine operations, public health and water security, and measuring and adapting to climate change. Reviews of modeling and assessment tools are provided and some direct access to models.

> Go to the Great Lakes Model Inventory Launch Page


Point Query Tool for the Great Lakes Coastal Forecasting System

The Point Query tool provides quick access to Great Lakes Coastal Forecasting System (GLCFS) input data and model output for a given location and time period.

> Go to the Point Query Tool Launch page


Data Catalog

The Data Catalog provides a centralized location for exploring and acquiring real-time and historic data. Through the Data Catalog, users are able to access data served by GLOS and provide links to non-GLOS data sources.

> Go to the Data Catalog Launch page


Partner Data

Great Lakes Weather and Navigation Observation Websites
Data on current lake conditions (
Surface temperature data (
Water monitoring data (
Great Lakes Environmental Database (

Michigan Tech Research Institute (MTRI) Cladophora/SAV mapping project results

Photo courtesy of Ed Verhamme