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East Coast storm brings sharp contrast between heavy snow, torrential rains

Saturday, December 5th 2020, 8:23 pm - This potent weekend system will be in full swing in the Maritimes Sunday, with a sharp divide between heavy snow in northern New Brunswick and torrential rains elsewhere.

The heaviest rain and snow from a strong storm impacting Atlantic Canada will begin the slow process of winding down in the Maritimes Sunday, though with plenty of bite left for Newfoundland, where the downpours will be ramping up Sunday morning. Combined with strong winds, travel will be difficult, particularly in New Brunswick north of Fredericton, where the heaviest snows are expected. For a more detailed breakdown, see below.


WEATHER HIGHLIGHTS

  • Rain and snow ease Sunday for the Maritimes, though snow lasts into the evening
  • The heaviest rains will be ending in the Maritimes Sunday morning, ramping up in Newfoundland
  • Potential for another storm next week

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SUNDAY: RAIN, HEAVY SNOW CONTINUE

The centre of this strong low will be just about over New Brunswick Sunday morning, after what will have been a very rainy night in Nova Scotia and southern New Brunswick, particularly the southwest, with snow in the north.

The heaviest of the rain will be slowly easing for the southwest and past its peak in Nova Scotia, and the snow, which will still be substantial, will shift slightly southeast.

ATL 1

Across the Gulf, heavy rain will begin in western Newfoundland, spreading to cover the island through the afternoon.

By Sunday afternoon, the snow will begin easing in New Brunswick and the rain will end in the Maritime region as a whole. By the evening, it will be replaced with snow in southern New Brunswick, though not amounting to much more than flurries or very light amounts.

ATL 3

As for accumulations, northern New Brunswick will see the heaviest amounts, with some 20-40 cm felling by the time conditions start to improve Monday. Across the Gulf, only Newfoundland's Northern Peninsula is expected to get any significant amount of snow.

Southern New Brunswick will pick up only a few centimetres.

EastSnow

Rainfall, meanwhile, should be in the range of 20-40 mm for a large part of the Maritimes, but 40-60 mm could fall in southwestern New Brunswick, an area that already saw some damaging flooding earlier in the week. The dividing line between snow and rain will be sharp, running through the middle of the province, such that parts of the north will experience this storm as an all-snow event.

Western Newfoundland is also likely to see 40-60 mm of rain, with the Avalon Peninsula only seeing 5-15 mm.

EastRain

Winds will be somewhat still Sunday for parts of eastern Nova Scotia by the morning, with 70-80 km/h gusts expected, declining slightly in southern New Brunswick by then. They'll be ramping up in the afternoon in Newfoundland, possibly hitting the 60-70 km/h range. By the evening, winds will start to ease off across the Atlantic.

BELOW: WHAT'S LEFT FOR NEW BRUNSWICK FROM THIS SYSTEM

LOOK AHEAD: EYES ON ANOTHER SYSTEM THAT FOLLOWS HOT ON THE HEELS OF THE WEEKEND STORM

There will be little breathing room in between storms impacting the region, with another system expected to move in late Tuesday and into Wednesday.

"This storm is expected to track well south of the Maritimes, but it should clip parts of southern Nova Scotia, primarily east of Halifax, with some snow," Gillham says.

ATLTempWed

This system is then expected to track near the Avalon on Wednesday, with rain, or a mix of wet snow and rain, expected for the Avalon, but heavy snow likely for areas northwest of the Avalon.

Check back as we continue to monitor these incoming storms.

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