Severe Thunderstorm Warning

Environment Canada has upgraded the thunderstorm watch to a warning for Leeds & Grenville Counties. Clusters of heavy thunderstorms are developing along Highway 29 from Smiths Falls to Brockville and moving northeast. They will affect Merrickville, and Kemptville in the next couple of hours with torrential rain. More storms are developing with heavy rain over St. Lawrence County, New York. They will begin to affect the Eastern Ontario region around the 416 shortly including Prescott and Spencerville.