Environment Canada issued a flash freeze warning for much of New Brunswick, Nova Scotia and Prince Edward Island early today.
A low pressure system brought snow, later rain and then snow again after the temperature plummeted as Arctic air pushed back into the region.
The daytime high in Greater Moncton was 3.0 C at 11am and pooling water began freezing when the thermometer dropped below freezing by 3pm.
By early Saturday, forecasters say the low could drop to -19 C but temperatures will moderate on Sunday before falling again on Monday.
A view of downtown Moncton from city hall, 23 Jan 2018 (City of Moncton)
A low pressure system from the west is bringing another mixed bag of precipitation to the Maritimes and once it departs more cold air will filter in behind it.
Schools were cancelled in New Brunswick today as snow began in the morning followed by a changeover to ice pellets and freezing rain and eventually to rain as the temperature climbed above freezing.
Flooding is possible again since the partially frozen ground is less able to absorb heavy rainfall.
Environment Canada issued a freezing rain warning for Greater Moncton but it was dropped later in the day with less than an hour of ice pellets/freezing rain recorded.
The temperature is expected to reach 10 C by early Wednesday before plunging to -13 C by early Thursday – a difference of 23 degrees in less than a day.
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.
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.
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.
Wildflowers and annuals in northeast Moncton, 03 Nov 2017 (Dearing)
As dark and dreary as November seems in Southeast New Brunswick, temperatures can often be volatile and this month was no exception.
Greater Moncton had at least five dramatic temperature swings starting on 10-11 November with a high of 10 C falling to -7 C with strong winds gusting up 69 km/h and the first snow flurries of the season.
The monthly mean of 1.9 C was exactly normal with highs near 20 C on two days early in the month while two days remained below freezing.
Overall precipitation was near normal for the first time since May although snowfall at 3.2 cm was well below normal.
NOVEMBER 2017 ALMANAC (at Greater Moncton Int’l Airport, 1981-2010)
Average HIGH 7.2 C
Average LOW -3.3 C
AVERAGE 1.9 C (Normal)
Extreme HIGH 19.8 C (06 Nov)
Extreme LOW -10.6 C (28 Nov)
RAINFALL 101.8 mm (NEAR normal)
SNOWFALL 3.2 cm (about 80 percent BELOW normal)
(Data courtesy Environment Canada)
NB Route 8 between Bathurst and Allardville, 17 Nov 2017 (Facebook/RCMP)
A fall storm brought heavy rain to Southern New Brunswick but rain changed to snow in northern New Brunswick today giving the region its first taste of winter this season.
RCMP were asking drivers to slow down and pay attention to the conditions as snow accumulated on highways.
Up to 10 cm of snow fell in some parts of the north with Bathurst reporting about 4 cm.
In Greater Moncton, the temperature climbed to 8 C in the morning and fell to 3 C by mid-afternoon when snow mixed in with rain.
Snow falling in west end Moncton, 10 Nov 2017 (Dearing)
A low pressure system moved into New Brunswick today bringing heavy rain accompanied by a vigorous cold front with Arctic air behind it.
As a result, the temperature in Greater Moncton plunged dramatically in just one hour – from a daytime high of 10.3 C at 11am to only 1.8 C by noon.
The thermometer continued to drop below freezing and rain turned to snow before the sky cleared in the late afternoon.
Environment Canada is forecasting a cold but dry weekend with sunshine and temperatures at or slightly above freezing.
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.
Warm weather in Ontario heading to the Maritimes, 17 May 2017 (TWN)
A high pressure system is pushing warm, southerly air into the Maritimes with highs approaching 30 C tomorrow in New Brunswick.
Environment Canada says humidex values could climb to 39 which has led to a Level 1 Heat Alert for Fredericton and St. Stephen.
The provincial health department issues this alert when anyone vulnerable to the heat may be affected.
Greater Moncton could break a record on Thursday if the temperature reaches the forecast high of 28 C.
Still looks like winter in NE Moncton, 31 March 2017 (Dearing)
The temperature was warmer in the far north cities of Whitehorse and Yellowknife than it was in Greater Moncton.
The thermometer barely climbed above freezing today but at least the sun made an appearance after a five day absence.
Lots of cloud and frequent periods of snow have made the end of March look more like the beginning of January.
Environment Canada is not forecasting spring-like weather in the near future with another possible snowstorm by the middle of next week.