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Wintry mess as system to glaze Atlantic Canada with modest snow, rain

Monday, February 22nd 2021, 7:59 pm - Unsettled, slushy conditions returns to Atlantic Canada as a potent stateside low will bring a wintry mix across the region Tuesday.

A potent low will pack quite the messy wallop Tuesday, particularly for southern Nova Scotia, where snow will change to rain, which will be heavy at times. Snow accumulations won't be too heavy, but 10-20 cm could fall over Cape Breton and portions of New Brunswick, P.E.I. and Newfoundland. This will be accompanied by some intense winds, so difficult travel is expected. Beyond, more snow is expected late-week with a strong clipper, as well as a potential messy weekend low. More on the timing and impact, below.


  • Snow arrived in the Maritimes Monday night, changes to rain in southern Nova Scotia Tuesday morning
  • 5-20 cm of snow expected, depending on location
  • Strong clipper to push in Wednesday night with more snow, anther messy system on the weekend


The same low that impacted Ontario and Quebec Monday intensified off the northeastern U.S. coast and tracked into the Maritime provinces Monday night. Snowfall warnings are in place for parts of New Brunswick.

Snow will push into parts of New Brunswick and southwestern Nova Scotia in the overnight hours Monday, tracking east early Tuesday morning into the rest of the Maritimes and Newfoundland.

ATLsnow (Monday PM)

Snowfall amounts won’t be overly excessive with this system for most areas, with 5-10 cm expected for northern New Brunswick, southern P.E.I. and northern Nova Scotia. Less than 5 cm is forecast along coastal areas of the latter because of the changeover to rain. Meanwhile, Cape Breton, and portions of P.E.I. and southwetern Newfoundland could see up to 20 cm by the time it tapers off on Tuesday.

Snow reaches western Newfoundland Tuesday afternoon, with a brief rain-snow mix possible for southern areas including the Avalon in the evening before changing to rain. This will continue into early Wednesday morning before it tapering off.

Due to the more northerly track of the system, it will pull in milder air into southern Nova Scotia. Because of this, snow will change to rain in southwestern Nova Scotia in the morning hours Tuesday as temperatures begin to rise. This will move east as the day progresses.


Rainfall will be heavy at times for Halifax into Tuesday afternoon. Precipitation will diminish in the Maritimes through the overnight hours. Totals will be greatest along southern shores of Nova Scotia, where 10-20 mm is anticipated.

Along with the rain and snow, winds will ramp up Tuesday afternoon for coastal Nova Scotia and southwestern Newfoundland. Southwesterly gusts of 40-60 km/h are expected for the former, while they may exceed 70 km/h for the latter. Winds will remain blustery in Newfoundland into Wednesday morning.


Beyond the system, a relatively strong clipper will slowly strengthen as it tracks into the region Wednesday night and Thursday with 5-10 cm of snow for parts of the central Maritimes, including Moncton and Charlottetown, and 5-15 cm for much of Newfoundland, but the snow could change to rain for the Avalon. Rain is expected for southern Nova Scotia.


Another messy system is likely for Saturday night and Sunday. It is too early to have confidence in the storm track, but a more northerly track is currently expected, which would bring rain for southern and possibly central Maritimes, but there is a potential for significant snow in Newfoundland.

Check back for updates as this next storm approaches Atlantic Canada.

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