Irishtown Reservoir, Moncton, 05 Nov 2017 (Dearing)
Autumn has made an abrupt return to Southeast New Brunswick.
The passage of a cold front lowered daytime highs in Greater Moncton from a near record of 19.3 C to a below seasonal high of 5.2 C over the past 24 hours.
Temperatures are poised to drop even lower later this week when the first blast of Arctic air this season moves into the Maritimes.
Environment Canada is forecasting a low of -7 C by early Saturday which will likely mean a hard, killing frost for any remaining sensitive vegetation.
Wildflowers and annuals in northeast Moncton, 03 Nov 2017 (Dearing)
A warm southerly flow allowed temperatures in the Maritimes to climb into the low 20s C yesterday with record highs broken in all three provinces.
Bouctouche was the hot spot in New Brunswick at 21.1 C which was the same record high set at St. Peters, Prince Edward Island.
Greenwood, Nova Scotia reached a summer-like maximum of 25.5 C which was the warmest in Canada.
A new high was also set at the Greater Moncton International Airport at 19.7 C edging out a record from 1999.
After a cold front moved through the region with some much needed rain, temperatures fell back to more seasonal values.
Many trees are losing leaves in west end Moncton, 27 Oct 2017 (Dearing)
October often felt like August in Greater Moncton with 12 days reaching daytime highs of 20 C or higher.
Environment Canada says only October 1913 was slightly warmer since records began in 1881.
Temperatures did fall below freezing on 7 days with some scattered frost but the month escaped a hard frost and vegetation continued to flourish.
Rainfall was more than 30 percent below normal in Southeast New Brunswick continuing a prolonged dry period which began in early summer.
OCTOBER 2017 ALMANAC (at Greater Moncton Int’l Airport, 1981-2010)
Average HIGH 17.7 C
Average LOW 5.0 C
AVERAGE 11.4 C (about 3.8 degrees ABOVE normal)
Extreme HIGH 23.7 C (08 Oct)
Extreme LOW -1.8 C (13 Oct)
RAINFALL 76.5 mm (about 30 percent BELOW normal)
(Data courtesy Environment Canada)
A slow moving frontal system brought heavy rain to western New Brunswick with about 20 mm falling per hour in the southwest.
Environment Canada reported 174 mm of rain in St. Stephen over a two day period which is a shocking amount considering about 180 mm fell from June to September.
Other amounts include 112 mm in Edmundston, 93 mm in Woodstock and 74 mm in Fredericton.
Rainfall totals were much lower in Southeast New Brunswick where only 27 mm fell at the Greater Moncton International Airport.
Tropical air with this system broke more record highs in Atlantic Canada with a maximum of 23.4 C in Moncton and Bouctouche, 23.5 C in Cheticamp, 22.0 C in Deer Lake and 21.2 C in Happy Valley-Goose Bay.
Autumn 2017 – Abnormally dry (YELLOW), Moderate drought (TAN), courtesy Agriculture Canada
Central New Brunswick is experiencing a moderate drought while much of the rest of the province is abnormally dry except for the Acadian Peninsula according to Agriculture Canada.
Forecasters say two weather systems could bring as much as 100 mm of rain on Thursday and Friday which is welcome relief for a prolonged dry period which began in early summer.
Environment Canada has issued rainfall warnings for western and southern New Brunswick but the Southeast is expecting less than 40 mm.
Meantime, more record highs were broken across the Maritimes today as southerly air continued to push temperatures well into the 20’s C.
Along the Riverfront Trail in Moncton, 21 October 2017 (Dearing)
Nine communities across New Brunswick set new record highs yesterday and the same will likely happen again today.
Greater Moncton was the warmest spot in the province climbing to 23.1 C which broke the old maximum temperature of 22.8 C from 1928.
Greenwood was among six communities in Nova Scotia breaking records with a high of 24.5 C.
Four records fell on Prince Edward Island including Charlottetown at 21.7 C.
Environment Canada says the Maritimes is enjoying a late October heat wave because the region is sandwiched between low pressure and high pressure allowing warm, southerly air to move northward.
Maple tree past peak in Moncton, 22 Oct 2017 (Dearing)
The fall foliage in Southeast New Brunswick is now past peak and the leaves are starting to tumble to the ground.
Typically a strong wind and/or rain event will bring down most remaining leaves from the trees with maples the first to shed and oaks among the last.
Forestry experts say unseasonably warm weather across the Maritimes this autumn have muted some fall colours.
Rich, vivid displays are most common when days are sunny but cool and nights are cold.
Aboiteau Beach, Cap-Pele, NB, 08 Oct 2017 (Dearing)
The jet stream brought warm southerly air into the Maritimes allowing temperatures in Southeast New Brunswick to climb into the 20s this Thanksgiving weekend.
Environment Canada says Greater Moncton reached a daytime high of 20.2 C on 07 October, 23.7 C on 08 October (near the record of 23.9 C from 1970), and 22.9 C on 09 October.
Given the autumn warmth, I couldn’t resist a visit to Aboiteau Beach (and neither could a handful of others) which was near 24 C under a mostly cloudy sky and it was quite windy.
Greenwood, Nova Scotia was the hot spot in Canada hitting 26 C for two days in a row.
Maple leaves changing colour in Fairview Knoll Park, Moncton, 04 Sept 2017 (Dearing)
September turned out to be a continuation of summer in Southeast New Brunswick right up until month end.
Daytime highs in Greater Moncton climbed above 25 C on ten days and a monthly maximum of 31.1 C turned out to be the warmest of 2017 set in early fall (26 Sept).
Although hurricanes never directly affected the province, meteorologists say much of the warmth last month came from tropical air pushed northward from these storms.
Rainfall was exactly normal but almost all of the precipitation fell during a single rain event spread over two days (6-7 Sept).
SEPTEMBER 2017 ALMANAC (at Greater Moncton Int’l Airport, 1981-2010)
Average HIGH 22.3 C
Average LOW 9.4 C
AVERAGE 15.8 C (about 2.2 degrees ABOVE normal)
Extreme HIGH 31.1 C (26 Sept, warmest high of 2017)
Extreme LOW 0.6 C (30 Sept)
RAINFALL 93.5 mm (Exactly NORMAL)
(Data courtesy Environment Canada)
Sunflowers flourishing during heat wave, Salisbury, NB, 24 Sept 2017 (Dearing)
Having a heat wave in late September is unusual for Southeast New Brunswick but even more so is that the highest temperature of 2017 has occurred in early autumn.
The thermometer soared to 31.1 C yesterday (26 September) at the Greater Moncton International Airport which breaks the previous maximum of 29.6 C from 2007 and records date back to 1881.
The previous high for the year had been 30.6 C recorded on 04 August.
At least 10 other New Brunswick communities set new record highs yesterday including Fredericton at 32.8 C, Woodstock at 32.3 C and Bouctouche at 31.8 C.
Environment Canada says temperatures will return to more seasonable values by the weekend with highs between 16 and 18 C.