43°9'Š / 79°14'V / Aukštis 111 m / 19:12 2026-05-19, America/Toronto (UTC-4)
nuo: 2026-05-19, 19:04
į: 2026-05-19, 22:03
Red warning - severe thunderstorm - in effect At 7:04 p.m. EDT, Environment Canada meteorologists are tracking an extremely dangerous thunderstorm capable of producing destructive wind gusts. ### Severe thunderstorm warnings are issued when imminent or occurring thunderstorms are expected to produce damaging hail, wind or rain.
St. Catharines - Grimsby - Northern Niagara Region
Emergency Management Ontario recommends that you take cover immediately if threatening weather approaches.
Environment Canada
2026-05-19, 19:05
nuo: 2026-05-19, 14:00
į: 2026-05-20, 02:02
Conditions are favourable for the development of squalls with wind gusts up to 40 knots. Thunderstorms are expected to move eastwards across the area this afternoon and evening. ### Please continue to monitor alerts and forecasts issued by Environment Canada. For more information monitor Canadian Coast Guard radio or Weatheradio stations.
Western Lake OntarioMariners are advised to prepare for potential squalls. Vulnerable vessels are most at risk and should seek safe harbour if underway.Environment Canada2026-05-19, 18:33
nuo: 2026-05-19, 18:11
į: 2026-05-20, 03:27
Yellow watch - severe thunderstorm - in effect Conditions are favourable for the development of severe thunderstorms that may be capable of producing strong wind gusts and large hail. What: Winds gusting 90 to 110 km/h. Hail up to quarter sized. When: Late this afternoon and this evening. Additional information: Damaging wind gusts will be the main threat with these storms. ### Local utility outages are possible. Damage to roofs, fences, branches or soft shelters is possible. Severe thunderstorm watches are issued when conditions are favourable for the development of thunderstorms capable of producing damaging hail, wind or rain. Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to [email protected] or post reports on X using #ONStorm. For more information: https://www.ontario.ca/page/be-prepared-emergency.
St. Catharines - Grimsby - Northern Niagara RegionWhen thunder roars, go indoors! Lightning kills and injures Canadians every year.
Emergency Management Ontario recommends that you take cover immediately if threatening weather approaches.Environment Canada2026-05-19, 18:14
nuo: 2026-05-19, 18:17
į: 2026-05-20, 02:01
Yellow warning - heat - ended ###
St. Catharines - Grimsby - Northern Niagara RegionEnvironment Canada2026-05-19, 18:19