Severe Thunderstorm Watch in Effect for Ottawa
Ottawa is under a severe thunderstorm watch issued by Environment Canada, prompting local residents and city officials to keep a close eye on rapidly changing weather conditions. The watch means atmospheric conditions are favourable for the development of severe thunderstorms that could bring dangerous weather to the region.
What to Expect
Severe thunderstorm watches differ from warnings — a watch means conditions are ripe for severe storms to develop, while a warning means one has been spotted or detected on radar. That said, residents shouldn't take the watch lightly.
Environment Canada's criteria for a severe thunderstorm includes any combination of the following:
- Large hail (2 cm in diameter or larger)
- Damaging wind gusts (90 km/h or stronger)
- Torrential rainfall capable of causing localized flooding
- Frequent lightning
These conditions can develop quickly and without much warning, particularly during the summer months when warm, humid air masses collide with cooler fronts moving through the Ottawa Valley.
Stay Prepared
Environment Canada recommends Ottawa residents and visitors take the following precautions while the watch is in effect:
- Stay indoors or seek shelter in a sturdy building when thunder is heard
- Avoid open areas, tall trees, hilltops, and bodies of water
- Secure outdoor furniture, garbage bins, and anything that could become a projectile in high winds
- Keep devices charged and have an emergency kit on hand in case of power outages
- Check for updated warnings at weather.gc.ca or through the WeatherCAN app
Ottawa Hydro and Hydro One customers in the region should also be aware that severe storms frequently cause downed power lines and outages — report any outages promptly and stay well away from downed lines.
Ottawa's Thunderstorm Season
Summer in the Ottawa Valley is prime thunderstorm territory. The region's geography — sitting at the confluence of the Ottawa and Rideau rivers and surrounded by the Canadian Shield to the north and the St. Lawrence Lowlands to the south — creates ideal conditions for intense convective storms during the warmer months.
Environment Canada typically issues several severe thunderstorm watches and warnings for the Ottawa area between May and September each year. Residents who've lived through past storms know that conditions can go from sunny to violent in under an hour.
Keep Monitoring
The watch covers the Ottawa area and surrounding communities. Residents are encouraged to monitor local updates from CTV News Ottawa, CBC Ottawa, and Environment Canada's official weather alerts page. Conditions can change rapidly, and a watch can be upgraded to a full warning with little notice.
If you're planning outdoor activities — whether it's a trip to Gatineau Park, a patio dinner in the Glebe, or an afternoon at Mooney's Bay — keep one eye on the sky and have a backup plan ready.
Source: CTV News Ottawa / Environment Canada via Google News RSS
