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 downpour during thunderstorm in NE Moncton, 11 Aug 2017 (Dearing)
A thunderstorm rolled through Greater Moncton on Friday afternoon and it was a welcome sight when two periods of downpours brought much needed rain.
A fire ban had been in place across Southern New Brunswick but more rain today lowered the fire hazard and burning is now allowed from 8pm to 8am.
The last significant rainfall in Greater Moncton was 8.2 mm on 21 July and prior to that it was 21.2 mm on 24 June.
Agriculture Canada has declared that much of Prince Edward Island is experiencing a drought with little rain since early June.
Heavy rain during thunderstorm in NE Moncton, 21 July 2017 (Dearing)
The temperature climbed to 30 C for three days in a row in Greater Moncton which is an unofficial heat wave since 32 C is the maximum by definition.
Those warm daytime highs, 30.4 C (19 July), 30.4 C (20 July) and 30.0 C (21 July), still haven’t eclipsed the season-to-date maximum of 30.8 C recorded on 11 June.
A cold front moved west to east through New Brunswick yesterday triggering scattered thunderstorms with heavy rain, gusty winds and even hail.
The heat and humidity have been replaced by a cooler, drier air mass with highs in the low 20’s C which is slightly below normal for late July.
Weather watches, warnings, statements re: heat and thunderstorms, 08 July 2017 (Environment Canada)
A strong ridge of high pressure over Western Canada has pushed the thermometer into record high territory for British Columbia and Alberta.
On 07 July, dozens of communities set new maximum temperatures with the highest at 39.4 C in Warfield and 38.3 C in Nelson but the hot spot in Canada was Garden River in northern Alberta at 40.3 C.
The major cities were warm too with Calgary reaching 33 C and Edmonton 30 C.
Heat warnings have been issued for most of Alberta and parts of Saskatchewan where temperatures will be near 29 C or higher for the next few days and residents are urged to take precautions.
Ominous clouds near the Nova Scotia-New Brunswick border, 03 June 2017 (Dearing)
Thunderstorm activity was common throughout Southeast New Brunswick in June and all but ten days had at least a trace of rainfall.
But precipitation amounts were generally light in Greater Moncton except for two major rain events – 36.6 mm fell on 09 June along with a peak wind gust of 102 km/h and 21.2 mm fell on 24 June.
Temperatures were cool during the first week of the month with an overnight low dropping to the freezing point although frost was generally avoided thanks to cloudy skies.
Summer-like conditions arrived by mid-month and many daytime highs climbed well into the 20’s C and reached 30 C or higher three times.
JUNE 2017 ALMANAC (at Greater Moncton Int’l Airport, 1981-2010)
Average HIGH 22.4 C
Average LOW 9.9 C
AVERAGE 16.2 C (about 1.0 degree ABOVE normal)
Extreme HIGH 30.8 C (11 June)
Extreme LOW 0.0 C (06 June)
RAINFALL 77.8 mm (about 20 percent BELOW normal)
(Data courtesy Environment Canada)
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.
Thunderstorm moves into Saint John, 12 June 2017 (AKS/Twitter)
After three days of daytime highs above 28 C in Greater Moncton, much cooler weather is coming thanks to a cold front and a change in wind direction.
The warm sometimes unstable air mass has created severe thunderstorms across the region.
Flash flooding was reported in Saint John yesterday after heavy downpours with wind and hail which were also observed today in northeastern Nova Scotia.
Environment Canada is forecasting below seasonal temperatures for Southeast New Brunswick over the next couple of days.
Ominous clouds near Nova Scotia-New Brunswick border, 03 June 2017 (Dearing)
Weather conditions have been cool and unsettled in the Maritimes over the past several days.
While driving in Nova Scotia on Friday, I encountered everything from clouds and heavy downpours to a clearing sky with bright sunshine to clouds and rain again.
On the way home to New Brunswick on Saturday, I encountered similar conditions.
In Greater Moncton today, the thermometer climbed to a daytime high of only 10.6 C under a dreary sky which is about 10 degrees below normal for early June.
Forecasters say warmer, more seasonal temperatures will return by Wednesday but not before a risk of frost in Southeast New Brunswick by early Tuesday.
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.