Operations Manager and Meteorologist with Ice & Environmental Services at Provincial Aerospace Ltd. I've been weather forecasting since 2000.
By: BwalshNLWeather , 1:33 PM GMT on December 24, 2013
A low pressure system intensifies south of Nova Scotia later today, passing southeast of the Avalon Peninsula overnight. Flurries today, mixed at times with freezing drizzle, will become light to moderate snow this evening, tapering to flurries near noon Christmas Day. The heaviest snowfall will be over the Burin and Avalon Peninsulas with 15-25 cm expected and winds gusting up to 70 km/h. Areas of the Southern Avalon will see the highest snowfall totals (20-25 cm), with snowfall amounts decreasing to the north and west (15-20 cm for St. John’s and the Burin Peninsula; 10-15 cm for the far Northern Avalon).
Timeline for St. John’s and the Northeast Avalon:
Tuesday Noon – 6 PM: Flurries mixed at times with freezing drizzle. Snowfall amount 1-2 cm. Wind northeast 15-25 km/h.
Tuesday 6 PM – Midnight: Light to moderate snow. Snowfall amount 2-4 cm. Wind northeast 20-30 km/h.
Wednesday Midnight – 6 AM: Moderate snow. Snowfall amount 5-7 cm. Wind northeast 30 gusting to 50 km/h.
Wednesday 6 AM – Noon: Moderate snow tapering to flurries. Snowfall amount 5-7 cm. Wind north 40 gusting to 60 km/h.
Wednesday Noon – 6 PM: Flurries. Snowfall amount 2 cm. Wind north 40 gusting to 60 km/h.
Skies clear Christmas night and temperatures turn very cold. Lows from -10 on the coast to -15 inland Boxing Day morning. Fair and cold across the Island on Boxing Day under a large area of high pressure.
Yet 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. The timeline and snowfall amounts should become more clear over the next day or two.
The views of the author are his/her own and do not necessarily represent the position of The Weather Company or its parent, IBM.