White Christmas

By: BwalshNLWeather , 6:47 PM GMT on December 23, 2013

Two separate low pressure systems will produce snowfall to Southern and Eastern Newfoundland through Christmas Day.

The first system will approach from the Maritimes later today, passing south of the Avalon Tuesday morning. Light snow develops across Southern and Eastern Newfoundland this afternoon. Light snow continues overnight, mixing at times with ice pellets on the Southern Avalon, before tapering to flurries Tuesday morning. Most areas of Southern and Eastern Newfoundland should see 8-12 cm by noon Tuesday with the highest amounts on the Burin and Southern Avalon Peninsulas. Winds will be light this evening, slightly increasing overnight; however, blowing and drifting snow shouldn't be a concern.

A second, more potent, system will follow behind the first low Christmas Eve night into Christmas Day. Currently, it looks like flurries Tuesday afternoon in Eastern Newfoundland will become snow, at times heavy, in the evening, tapering off to flurries early Christmas Day afternoon. The heaviest snowfall will be over the Burin and Avalon Peninsulas with 15-25 cm expected and winds gusting up to 70 km/h.

Snow/Wind Timeline for the Avalon Peninsula
Monday 6 PM – Midnight: 2-3 cm snowfall; light winds
Tuesday Midnight – 6 AM: 4-6 cm snowfall; wind east 15-25 km/h (snow mixed at times with ice pellets on Southern Avalon)
Tuesday 6 AM – Noon: 2-3 cm snowfall; wind east 15-25 km/h (snow mixed at times with ice pellets on Southern Avalon)
Tuesday Noon – 6 PM: 1 cm snowfall; wind east 20-30 km/h
Tuesday 6 PM – Midnight: 2-4 cm snowfall; wind northeast 25-40 km/h
Wednesday Midnight – 6 AM: 6-10 cm snowfall; wind northeast 40 gusting to 70 km/h
Wednesday 6 AM – Noon: 5-8 cm snowfall; wind north 40 gusting to 70 km/h
Wednesday Noon – 6 PM: 2-3 cm snowfall; wind north 40 gusting to 60 km/h

Boxing Day will be fair and cold across the Island under a large area of high pressure. However, another system is expected to move near the Island on Friday. This low could produce more accumulating snow to much of the Island, particularly in the east; however, a changeover to rain is possible on the Avalon Peninsula.

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About BwalshNLWeather

Operations Manager and Meteorologist with Ice & Environmental Services at Provincial Aerospace Ltd. I've been weather forecasting since 2000.

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