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.
Tornado warning, 11 Aug 2016 (CTV/Twitter)
Shortly after 8:30 this morning, a rare tornado warning was issued in central New Brunswick for an area from Stanley to Blackville.
Environment Canada says a severe thunderstorm moving through the area with funnel clouds was capable of producing a tornado.
The most severe storm cells were tracked near Boiestown.
The tornado warning was in place for more than half an hour.
Meteorologists say tornadoes in the morning are extremely rare with most occurring in the late afternoon and early evening.
Ominous clouds off Glace Bay, NS, 07 Aug 2016 (A. Petrie/Twitter)
A tornado watch may be rare for New Brunswick but it is even more so for Cape Breton Island.
Environment Canada issued a tornado watch for Sydney and Cape Breton County early Sunday evening for almost an hour.
Although some ominous clouds were spotted including potential funnel clouds, no tornadoes were reported.
Boardwalk to Kellys Beach, Kouchibouguac National Park, 05 Aug 2016 (Dearing)
Severe thunderstorm watches and warnings were posted across central and southern New Brunswick today.
At 5:16pm, Environment Canada issued a rare tornado watch for Grand Lake and Queens County noting conditions were favourable for the development of severe thunderstorms which could produce tornadoes.
At 5:39pm, the tornado watch came to an end.
There were no immediate reports of tornadoes.
Greater Moncton was under a severe thunderstorm watch from about 4-7pm with some thunder heard and a brief but heavy rain shower.
Severe thunderstorms moved into northwestern New Brunswick and the neighbouring State of Maine yesterday and one of those storm cells spawned a tornado.
U.S. National Weather Service officials say a tornado did touch down in Aroostook County, Maine near Caribou.
Environment Canada says funnel clouds may have been spotted in the Grand Falls area but the storm cell weakened by the time it reached New Brunswick.
Flash flooding was also reported in western parts of the province.
The severe weather came from a hot, humid air mass which has moved out of the region and has been replaced by cooler, drier air.