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Weather Notices & Alerts

  • Grand River Water Safety Statement July 13 2023
    The Grand River Conservation Authority is issuing the following Watershed Condition Statement – Water Safety.
    A slow-moving weather system crossed the Grand River watershed overnight Wednesday, resulting in 50-70mm of rainfall in northern and central portions of the watershed. 
  • Credit Valley Conservation - Flood Outlook Statement June 24 2023
    Credit Valley Conservation (CVC) advises that Environment Canada is predicting showers and localized significant rainfall in the amounts of 50-75mm.
    Heavy rainfall may cause pooling on roadways, flash floods and flooding in low-lying areas. Higher water levels will result in local streams and rivers becoming dangerous, especially in the vicinity of culverts, bridges, and dams. 
  • GRCA Flood Message #4 – Updated Combined Flood Warning/Flood Watch

    The strong low-pressure system that moved into the region early Friday, March 31, resulted in 30-60 mm of rain throughout the Grand River watershed. Thunderstorms overnight resulted in periods of intense rainfall. Watershed received an additional 10 to 20 mm of rain through the day on Saturday.

  • GRCA Flood Message #4 – Updated Combined Flood Warning/Flood Watch

    The Grand River Conservation Authority (GRCA) is issuing the following updated combined Flood Warning/Flood Watch message.

    The strong low-pressure system that moved into the region early Friday, March 31, resulted in 30-60 mm of rain throughout the Grand River watershed. 

  • Credit Valley Conservation - UPDATE April 1 2023

    Credit Valley Conservation (CVC) advises that the Credit River watershed received 30-35 mm of rain during Friday March 31st and overnight thunderstorms. Also, the Environment of Canada is forecasting risk of thunderstorms this afternoon.

  • Credit Valley Conservation - March 22 2023

    CVC advises that Ministry of Natural Resources and Forestry’s (MNRF) is forecasting a low-pressure weather system expecting to bring 5-10 mm of rainfall on Thursday, March 23rd . Another low-pressure weather system expecting to bring from 10 mm to 15 mm of rain and snow on Saturday, March 25th . 

  • CVC Watershed Conditions Statement March 16 2023

    1255 Old Derry Road, Mississauga, ON, L5N 6R4

    Telephone: (905) 670-1615

  • Credit Valley Conservation - February 7 2023

    February 7, 2023 - Credit Valley Conservation (CVC) advises that daytime highs will range from 2 to 8ºC over the next several days. Light rain is forecasted for today and up to 20mm is expected on Thursday.

  • Grand River Watershed Conditions Statement January 2 2023

    Another weather system is expected to bring up to 30mm of rainfall to southern Ontario on Tuesday and Wednesday, which will result in increased river flows throughout the Grand River watershed.

    Ground conditions are frozen and/or saturated due to recent weather events. No significant flooding is anticipated with this event; however, higher river flows in local waterways will increase the risk in low-lying areas typically prone to flooding.

  • Grand River Watershed Conditions Statement Dec 30 2022

    The weather system moving into southern Ontario on Friday will bring mild temperatures and moderate rainfall across the Grand River watershed. These warmer temperatures have triggered a gradual melting of the snow pack, which will result in runoff into local waterways. Moderate rainfall is expected to accompany this weather system with up to 40mm forecast for many parts of the watershed over the next five days.


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