Damage from a tornado in west end Ottawa, ON, 22 Sept 2018 (Instagram)
Environment Canada has confirmed two powerful tornadoes ripped through west end Ottawa before touching down again in Gatineau across the Ottawa River.
Officials say dozens were hurt and at least two residents are in hospital with critical injuries.
Tens of thousands were left without power after at least 80 utility poles either snapped or were damaged.
Meteorologists say severe thunderstorms spawned one twister classified as an EF-3 with winds up to 265 km/h while another tornado was an EF-2 with winds up to 220 km/h.
Tornadoes are not uncommon in Southern Ontario but storms of this strength are rare.
Strong waves crashing ashore at Pensacola Beach, Florida, USA, 04 Sept 2018 (Instagram)
Tropical Storm Gordon has claimed at least one life after striking the American Gulf Coast late Tuesday near the Alabama-Mississippi border.
Authorities say strong winds caused a tree to fall on a mobile home in Pensacola, Florida where a child was found deceased.
The U.S. National Hurricane Centre says Gordon weakened as it moved inland and was not powerful enough to reach hurricane status.
Tornado warnings were issued after radar showed possible twisters stemming from the storm.
Forecasters say as much as 200 cm of rain (almost 80 inches) could fall and the system could have an impact on Eastern Canada by early next week.
Severe thunderstorms prompted Environment Canada to issue a rare tornado warning for northwestern New Brunswick late Tuesday afternoon.
The warning was in place for about 30 minutes and covered Victoria County including Grand Falls and Plaster Rock.
Meteorologists said a storm cell showed signs of rotation on radar which was capable of producing a tornado.
However, there were no reports of twisters actually touching the ground.
Trees uprooted by a tornado damage a home in Waterford, Norfolk County, ON, 13 June 2018 (OPP)
Two tornadoes have been confirmed in Haldimand, Norfolk and Oxford counties as severe thunderstorms rolled through Southwestern Ontario on 13 June.
Environment Canada says a tornado categorized as an EF-2 (Enhanced Fujita Scale 2) with maximum winds of 180 km/h ripped through the communities of Jarvis and Waterford uprooting trees, ripping shingles off buildings and destroying several barns.
Damage was reported intermittently along a path roughly 32 km long.
A second, less powerful twister categorized as an EF-0 struck near the town of Norwich around the same time and caused minimal damage.
Flooding in Buffalo Bayou Park, Houston, TX, USA, 27 Aug 2017 (Twitter)
Harvey may have been downgraded to a tropical storm as it moved inland over Texas but the U.S. National Weather Service stated “this event is unprecedented and all impacts are unknown and beyond anything experienced.”
Forecasters say the Houston metropolitan area could receive more than 1000 mm of rain from the storm over the next few days which has claimed at least five lives.
By early today, more than 600 mm had fallen in America’s fourth largest city overwhelming lakes and rivers forcing thousands of residents scrambling into boats or onto rooftops to safety.
Tornado warnings have been lifted but a flash flood warning remains in place for much of southeastern Texas.
Damage from microburst in Notre-Dame-de-Grace, Montreal, QC, 22 Aug 2017 (Instagram)
A sudden and powerful storm which meteorologists call a microburst created a path of damage in Montreal which included the Notre-Dame-de-Grace borough.
Strong, gusty linear winds up to 120 km/h brought down trees and power lines leaving thousands without electricity on Tuesday.
Environment Canada has confirmed a tornado struck Lachute, northwest of Montreal, where winds reached up to 180 km/h.
No one was hurt but hundreds of homes were damaged and some residents have been displaced.
Heavy rain, hail and wind, Plaster Rock, NB, 27 June 2017 (Greg LeBel/Facebook)
An unstable air mass moved from west to east in New Brunswick producing severe thunderstorms bringing torrential rain, large hail and strong winds.
Environment Canada believes a severe thunderstorm formed near Doaktown and possibly spawned a tornado that moved into the Blackville area last night.
Golf ball size hail and damaging winds with gusts up to 100 km/h were recorded in the Plaster Rock area.
Southeast New Brunswick has seen an above average 18 days with thunderstorm activity this June and a severe thunderstorm watch was issued in the region this afternoon.
Tornado swirling near Three Hills, AB, 02 June 2017 (TWN/Twitter)
A large tornado touched down in central Alberta near Three Hills on Friday afternoon amid severe thunderstorms.
Environment Canada had issued a tornado warning for the region which lasted about half an hour.
Officials say wind speeds up to 130 km/h caused damage to trees, roofs and buildings but no one was hurt.
Severe thunderstorm, Caraquet, NB, 18 May 2017 (R.Mallais/Twitter)
After a severe ice storm in February, the Acadian Peninsula has been hit with bad weather again and this time by possible tornadoes.
Environment Canada is investigating after social media showed downed power poles, partially collapsed roofs and overturned concrete last night.
Severe thunderstorms can cause straight line winds with gusts as high as 130 km/h which is the same strength as the lowest level of tornado.
NB Power is working to restore electricity for thousands in northeastern New Brunswick and it could be sometime tomorrow before full restoration occurs.
The same frontal trough of low pressure moved into Greater Moncton this afternoon creating a 9 degree temperature drop (23 C to 14 C) in less than an hour and a wind direction change from southwest to northeast.
Snow falling in a Calgary backyard, 22 Aug 2016 (Twitter)
Snow is not unusual in Alberta in August but nevertheless no one wants to see it in late summer.
Calgary received a trace of snow while several centimetres fell in the foothills and in the Rocky Mountains.
The snow was part of a wild weather system which also brought thunderstorms, heavy rain, flooding, strong winds, a confirmed tornado and even a waterspout.