Flooding then flash freeze

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Satellite image taken just before cold front sweeps through Maritimes, 13 Jan 2018 (earth.nullschool.net)

After a low pressure system brought heavy rain and strong winds gusting up to 74 km/h to Southeast New Brunswick early today, a cold front moved through the region plummeting temperatures below freezing.

The thermometer in Greater Moncton dropped an incredible 14 degrees in just one hour – from 15 C at 11am to 1 C at noon – and then fell below zero shortly afterward.

Today’s daytime high of 16.7 C has unofficially broken the 13 January record of 12.2 C from 1972.

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Floodwaters in Moncton near Wheeler Blvd. and Crowley Farm Rd., 13 Jan 2018 (City of Moncton)

Flooding was reported in various parts of Greater Moncton and the province was forced to close some roads due to high water levels.

Before the precipitation ends later tonight, rain will change to freezing rain mixed with ice pellets and then finally to snow.

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Arctic air to retreat

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Snow is piled high in Boston, MA, USA, 05 Jan 2018 (AP)

Much of New Brunswick was under another extreme cold warning this weekend with a near record low of -22.3 C in Greater Moncton today (record is -23.3 C from 1945) and a bone-chilling wind chill near -36.

Environment Canada is calling for temperatures to moderate this week with a return to near normal values and even above freezing temperatures by Thursday.

The Northeast United States has also been under a cold snap and the thermometer bottomed out Sunday with record lows in a number of cities including Burlington, Vermont at -29 C and Portland, Maine at -24 C.

Boston, Massachusetts tied its record low of -19 C just days after digging out from 34 cm of snow during the ‘bomb cyclone’ and being inundated with icy floodwaters from the highest tides in a century.

Greater Moncton spared worst of storm

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Powerful storm surge causes flooding along the waterfront in Halifax, NS, 05 Jan 2018 (Twitter)

The ‘bomb cyclone’ or ‘snow hurricane’ – featuring a dramatic drop in atmospheric pressure when warm and cold air collided – has left the Maritimes and spared Southeast New Brunswick from the worst of its fury.

While strong winds were a factor throughout the region, Greater Moncton received less snow compared to further north and west.

To the south and east, more rain fell along with hurricane-force winds (up to 200 km/h gusts in western Cape Breton) which created powerful storm surges causing flooding along the coast.

Here are some totals from Environment Canada and local estimates:

  • Greater Moncton Airport  14 cm snow, 10 mm rain, 91 km/h wind gust
  • Bathurst  58 cm snow, 80 km/h wind gust
  • Fredericton  30 cm snow, 78 km/h wind gust
  • Saint John  5 cm snow, 20 mm rain, 87 km/h wind gust
  • Halifax Stanfield Airport  40 mm rain, trace snow, 122 km/h wind gust

The storm may have departed but Arctic air has filtered back into the Maritimes which will mean a bitterly cold weekend.

‘Bomb cyclone’ barrels up U.S. East Coast

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Snow accumulates in Tallahassee, Florida, USA, 03 Jan 2018 (Twitter)

For the first time in 28 years, the capital of America’s Sunshine State had measurable snow.

Tallahassee may occasionally see snowflakes in winter but today was only the fourth time since 1950 that snow actually accumulated on the ground.

The wintry blast was thanks to a so-called bomb cyclone which originated off Florida’s east coast and is barreling up the Atlantic toward the Maritimes.

The intense storm system also brought heavy freezing rain to South Carolina and blizzard warnings have been posted from Virginia to Maine.

Environment Canada has issued a winter storm warning for Greater Moncton and Southeast New Brunswick with 30 cm of snow/ice pellets and 10 mm of rain as the temperature finally climbs above freezing.

The thermometer has not risen above zero since Christmas Day and seven straight days have been below -10 C.

Storm coming to N.B.

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Several weather outlets are forecasting a major winter storm will hit the Maritimes bringing heavy snow and strong winds to New Brunswick just days into 2018.

Blizzard conditions are possible along with large waves and high water levels along the coast.

Nova Scotia may get more rain along the Atlantic coast while a rain/snow mix is likely inland.

Until the storm arrives, Arctic air remains firmly in place with several cities in Ontario setting new record lows on New Year’s Day including -22.6 C at Toronto Pearson Airport and -28.6 C at Ottawa Macdonald-Cartier Airport.

December 2017 – Cold and dry

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Heavy snow falling in northeast Moncton, 09 Dec 2017 (Dearing)

December in Southeast New Brunswick started out on a normal note with above freezing daytime highs and chilly but not frigid overnight lows.

But an early Arctic blast settled in over the Maritimes by mid-month and Greater Moncton had five days below -10 C with four nights plunging to -20 C or lower.

After near normal precipitation last month, both rainfall and snowfall were below normal for December.

Two major snow events were recorded on 9-10 Dec (16 cm) and 25 Dec (20 cm) with a significant rainfall on 23 Dec (10 mm).

DECEMBER 2017 ALMANAC (at Greater Moncton Int’l Airport, 1981-2010)

Average HIGH  -2.5 C

Average LOW  -10.7 C

AVERAGE  -6.6 C (1.8 degrees BELOW normal)

Extreme HIGH  11.1 C (06 Dec)

Extreme LOW  -21.8 C (31 Dec)

RAINFALL  39.1 mm (almost 30 percent BELOW normal)

SNOWFALL  51.4 cm (almost 20 percent BELOW normal)

(Data courtesy Environment Canada)

Extreme cold warning

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A portion of Niagara Falls has frozen over, along Canada-US border, 31 Dec 2017 (Instagram)

Environment Canada issued an extreme cold warning today for most of New Brunswick with frigid temperatures and moderate winds bringing bitter wind chills between -30 and -36 on New Year’s Day and 02 January.

From Yukon to Quebec, extreme cold warnings have been posted prompting many cities including Toronto and Ottawa to cancel some New Year’s Eve festivities or move events indoors.

In Calgary, zoo officials say it’s been so cold even the penguins have been brought inside.

Claresholm, Alberta set a new record low of -41.8 C and Brooks was close behind at -40.5 C.

Bitter cold coast to coast

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Frigid temperatures across Canada, observed 8am AST 28 Dec 2017

This is Canada and we know it gets cold in the winter but the bitter Arctic air which has enveloped almost the entire country is a bit unusual so early in the season.

Environment Canada says the size of the cold wave – from interior British Columbia to Atlantic Canada – and the duration of the frigid weather are exceptional for late December.

Meteorologists say 1993 was the last time there was a similar cold spell between Christmas and New Year’s.

Only the coast of British Columbia will escape the worst but even there, daytime temperatures will barely climb above freezing.

West coast goes white

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Kitsilano neighbourhood,Vancouver, BC, 19 Dec 2017 (Twitter)

It doesn’t snow in Vancouver very often but when it does panic typically ensues on streets and sidewalks.

About 7 cm fell at Vancouver International Airport yesterday with higher amounts reported to the north and east.

Snow also fell on Vancouver Island with only 3 cm in Victoria but at least 20 cm in Nanaimo.

Parts of the British Columbia interior picked up more than 30 cm.

Snow here and there

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A ridge of clouds as the sun rises over northern Nova Scotia near Truro, 15 Dec 2017 (Dearing)

A ridge of clouds as the sun rose over northern Nova Scotia was an awesome sight to behold during a trip from Moncton to Halifax on Friday.

Although Greater Moncton lost most of its snow cover due to rain a few days ago, Truro picked up some snow early Friday (5-10 cm) but Halifax was snow-free.

The Nova Scotia capital did pick up a few centimetres early Saturday but Truro and Moncton didn’t.

But the entire Maritimes is under an Arctic air mass which has brought cold wind chills to -25 and daytime highs well below freezing.