UPDATE 12:35 AM:
Environment Canada has ended all thunderstorm watches for the region, including those in Cornwall, Maxville, Alexandria, and Lancaster.
The weather watch body says conditions are no longer favourable for the development of severe thunderstorms, and the storms have weakened or moved out of the region.
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UPDATE 12:10 AM:
Severe thunderstorm watches have ended for most of the region, with the exceptions of Cornwall, Maxville, Alexandria, and Lancaster.
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UPDATE 11:20 PM:
Latest Environment Canada reports say severe thunderstorm watch has ended for Ottawa north and south, Kanata, Orleans, Gatineau, Richmond and Metcalfe.
The tornado watch has ended for Merrickville, Wolford, Kemptvile, Brockville, and Prescott.
The severe thunderstorm watch is still in effect for Maxville, Alexandria, Cornwall, Lancaster, Winchester, Newington, Morrisburg, Long Sault, Prescott, and Russell.
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UPDATE:
Environment Canada has updated its weather watches for the province.
A tornado watch is continued for Kemptville, Merrickville, Brockville, Prescott, and Wolford.
The tornado watch has ended for Tamworth, Syndenham, South Frontenac, Westport, Charleston Lake, Gananoque, and Mallorytown.
A severe thunderstorm watch is continued for Ottawa north and south, Gatineau, Kanata, and Orleans.
Further outside the city, the severe thunderstorm watch is also continued for Richmond, Metcalfe, Maxville, Alexandria, Cornwall, Lancaster, Winchester, Newington, Morrisburg, Long Sault, Prescott, and Russell.
Environment Canada says conditions are favourable for the development of dangerous thunderstorms that may be capable of producing strong wind gusts, large hail, and torrential rains.
A severe thunderstorm watch has ended for Smiths Falls, Perth, Eastern Lanark County, Plevna, Sharbot Lake, and Western Lanark County.
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A potentially dangerous storm is making its way through the province.
Enviornment Canada has issued a tornado warning for Kemptville, Merrickville, Brockville, Prescott, Gananoque, Mallorytown, Wolford, and Winchester.
Ottawa remains under a severe thunderstorm watch.
Stay tuned for more details as this develops.