LWCB Logo Lake of the Woods Control Board Basin Data

 
Quick Sets - Current Data
All Current Reports
All Current Reports And Primary Site Graphs
All Current Documents
Key Site 2-Year Graphs
Current data is updated each workday, normally by 11:00am CT.
All data is provisional and may be revised at a later date.
See Notes below regarding data sources and file format.
2025-01-02 to 2025-01-17: Gold Portage level estimated from Squirrel Island level, which resulted in an estimate of Namakan Lake mean level.
2025-02-04: All data products reference new percentiles computed for the period of 1991 to 2020. Maximum and minimum records updated to extend to 2023.
 
Last Updated: 2025-02-11 10:53
 
Current Data Reports Period Ending
  • Daily Report
    		•     2025-02-10
  • 10-Day Inflow Report
    		•     2025-02-11
  • 10-Day Database Report
    		•     2025-02-11
  • Weekly Report
    		•     2025-02-04
     
    Current Data Graphs Period Ending
    Precipitation
  • English System
    		•     2025-02-11
  • Winnipeg System
    		•     2025-02-11
     
    Water Levels & Flows
        Primary Sites
  • Lake St. Joseph
    		•     2025-02-11
  • Lac Seul
    		•     2025-02-11
  • English River and Pakwash Lake
    		•     2025-02-11
  • Namakan Lake
    		•     2025-02-11
  • Rainy Lake
    		•     2025-02-11
  • Lake of the Woods
    		•     2025-02-11
  • Winnipeg River in Ontario
    		•     2025-02-11
  • Winnipeg River in Manitoba
    		•     2025-02-11
     
        Secondary Sites
  • Cat River
    		•     2025-02-11
  • Upper English River
    		•     2025-02-11
  • Middle English Tributaries
    		•     2025-02-11
  • Lower English Tributaries
    		•     2025-02-11
  • English River at Grassy Narrows
    		•     2025-02-11
  • English River at Caribou Falls
    		•     2025-02-11
  • Basswood Lake Basin
    		•     2025-02-11
  • Lac La Croix
    		•     2025-02-11
  • Vermilion River
    		•     2025-02-11
  • Seine River Basin
    		•     2025-02-11
  • Turtle River
    		•     2025-02-11
  • Rainy River Levels
    		•     2025-02-11
  • Rainy River Basin Flows
    		•     2025-02-11
  • Whitedog Falls / Boundary Falls
    		•     2025-02-11
  • Whitemouth River
    		•     2025-02-11
    Other Data Reports Period Ending
  • 50-Day Inflow Report
    		•     2025-02-06
  • 50-Day Database Report
    		•     2025-02-06
     
    Reference Period Ending
  • Historical Graphs Page
    		•         2022
  • Percentile Data Page
    		•         2020
     
    Legends and Explanations
  • Reports Explainer (Summary)
  • Daily/Weekly Reports - Description
    		•
  • 10/50-Day Inflow Reports - Description
    		•
  • 10/50-Day Database Reports - Description
    		•
  • Current Data Graphs Legend
    		•
  • Report/Graph Revisions
    		•
     
     
     
    Notes
  •  
    		•  The data in these reports and graphs is from a variety of sources, including the following: Water Survey Canada (water level and flow gauges in Ontario and Manitoba), Meteorological Service of Canada (precipitation and temperature data); Ontario Ministry of Natural Resources and Forestry (precipitation data); United States Geological Survey (water levels and flows in Minnesota); US Army Corps of Engineers (water levels in Minnesota); H2O Power LP (water level and flow data from dams in Ontario), PCA (water level and flow data from dam in International Falls), Manitoba Hydro (water level and flow data from dams in Manitoba) and Ontario Power Generation (water level and flow data from dams in Ontario); volunteers (precipitation data in Ontario and Minnesota). Inflow for the major lakes is computed by the LWCB, as are all statistics.
     

    Home Return to LWCB Main Page