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The heat and humidity have been replaced by a cooler, drier air mass with highs in the low 20’s C which is slightly below normal for late July.
An ominous afternoon sky over Greater Moncton, 17 July 2017 (Dearing)
For whatever reason, summer seems to go by faster than the other seasons and here we are already at the midway point of July.
After 16 days, Greater Moncton has been having a decent month with an average temperature of 19.3 C which is 0.5 degrees above normal.
Daytime highs have been warm but not hot with a peak of 29.4 C on 16 July while overnight lows have been mild except for a chilly low of 8.9 C on 05 July.
The only concern is a lack of rainfall.
The tally is 19.8 mm so far – less than a quarter of the monthly total – but keep in mind we are entering what is traditionally the driest period of the year in Southeast New Brunswick.
(Stats courtesy Environment Canada)
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)
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 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.
Tree downed in key intersection of downtown Moncton, 09 June 2017 (Wade Perry/Twitter)
A low pressure system moved into the Maritimes today bringing up to 40 mm of rain to Greater Moncton.
A strong thunderstorm also rolled through Southeast New Brunswick in the early evening with wind speeds clocked as high as 102 km/h.
The brief but powerful gusts downed trees and branches onto power lines and caused thousands of power outages.
Environment Canada had not issued any weather warnings for the region.
The storm replaced a warm air mass which set record highs in at least four New Brunswick communities yesterday.
The hotspot was Kouchibouguac National Park which climbed to 32 C and that beats the maximum from 1992.
Moncton and Doaktown both tied their record highs of 30.6 C for the date.
Brilliant pink sky over NE Moncton, 06 June 2017 (Dearing)
At least one New Brunswick location dropped to a new low on 06 June.
Environment Canada says Kouchibouguac National Park set a new cold record of -1.7 C which broke the old minimum of -1.1 C from 1958.
Greater Moncton managed to escape frost this week thanks to cloud cover although the thermometer fell to the freezing point tying a record low.
Following a brief period of very warm air, forecasters say temperatures will reach near seasonal values for the short term.
A break in clouds over the Nova Scotia-New Brunswick border, 03 June 2017 (Dearing)
The last couple of days had near record lows in Greater Moncton with temperatures dropping to near the freezing point.
A low of 1.0 C at the airport on Monday was close to the 1947 record of 0.6 C while a low of 0.0 C on Tuesday tied the minimum from 1995.
Fortunately cloud cover prevented frost in most of New Brunswick but another risk is possible by early Wednesday.
Folklore suggests frost can be expected until the full moon in June which is this Friday the ninth.
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.
Trailing arbutus or Mayflower growing in Irishtown Nature Park, 20 May 2017 (Dearing)
May in Southeast New Brunswick certainly lived up to its unpredictable nature as a transitional month between winter and summer.
Overall temperatures were above normal in Greater Moncton but oddly enough some of the coolest days were in the last third of the month.
Many days were cloudy and rainfall was heavy with only seven days without at least a trace of precipitation.
By the final week, trees were in full leaf or blossom and perennials were in full bloom.
MAY 2017 ALMANAC (at Greater Moncton Int’l Airport, 1981-2010)
Average HIGH 16.1 C
Average LOW 5.1 C
AVERAGE 10.8 C (about 0.8 degrees ABOVE normal)
Extreme HIGH 30.5 C (18 May)
Extreme LOW -0.4 C (13 May)
RAINFALL 163.5 mm (about 40 percent ABOVE normal)
(Data courtesy Environment Canada)
The Weather Network has released its summer 2017 forecast covering June, July and August.
A changeable summer is expected across Atlantic Canada with extended periods of above seasonal and below seasonal weather.
The southern Maritimes which includes Greater Moncton and Southeast New Brunswick and possibly into southern Newfoundland have the best chance of seeing temperatures tip to the warm side of normal.
Meanwhile, cooler than normal temperatures are expected to be more persistent across eastern Labrador and northern Newfoundland.
Near normal rainfall is expected this summer except for western and northern New Brunswick.
There is the potential for a couple of systems to tap into subtropical or tropical moisture and bring above normal rainfall to parts of the region.