Update to our May Snowfall Tonight

By: BwalshNLWeather , 10:14 PM GMT on May 05, 2014

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Good evening,

I just wanted to pass along a quick update to what was sent yesterday regarding the changeover to snow that will occur tonight across Newfoundland, leaving many areas of the Island under a blanket of May snowfall. An intensifying low will remain south of the Burin Peninsula tonight. Rain along the coast, and freezing rain inland, will change to snow later this evening, or after midnight on the South Coast/Southern Avalon, as colder air settles over the Island. Snow will be at times heavy over Central and Eastern Newfoundland overnight, before tapering to flurries Tuesday morning. Since the ground is much warmer this time of year (despite the lack of mild temperatures so far this spring), and the snow will be wet, it will take longer for the snow to accumulate on some surfaces, particularly roads, but snowfall amounts of 15-20 cm are possible for eastern sections of Central Newfoundland, including Clarenville, the Bonavista Peninsula, Terra Nova and Gander. Amounts diminish as you move south/east/west, and parts of the Southern Avalon and Burin Peninsulas should see less than 5 cm of snow, with rain mixing in at times overnight. The Northeastern Avalon, including Metro St. John’s, could see a few hours of freezing rain this evening before changing to snow overnight. Should the freezing rain last longer, the snowfall amounts will be reduced further. Winds won’t be overly strong with the system, but gusts of 50-60 km/h could produce some blowing snow, especially over open areas overnight and Tuesday morning.

Storm Timeline for St. John’s-Metro:
Tonight 6 PM – Midnight: Freezing rain changing to snow near midnight. Freezing rain amount 2-5 mm. Wind east 30 gusting to 50 km/h.
Tuesday Midnight – 6 AM: Snow tapering to flurries. Risk of freezing rain. Snowfall amount 6-8 cm. Wind northeast 30 gusting to 50 km/h.
Tuesday 6 AM – Noon: Flurries. Risk of freezing drizzle. Snowfall amount 1-2 cm. Wind northeast 20-30 km/h.
Tuesday Noon – 6 PM: Flurries. Risk of freezing drizzle. Snowfall amount trace-1 cm. Wind north 20-30 km/h.
Tuesday 6 PM – Midnight: Flurries. Snowfall amount trace-1 cm. Wind northwest 30 gusting to 50 km/h.

Snowfall Amounts by Tuesday Evening:
Southern Avalon/Burin Peninsula: 2-5 cm
Northeast Avalon (including St. John’s): 7-10 cm
Northwestern Avalon: 10-15 cm
Clarenville/Bonavista/Terra Nova and Central (east of Grand Falls-Windsor): 15-20 cm
Central (west of Grand Falls-Windsor): 8-15 cm
West Coast: 3-6 cm
Northern Peninsula: Less than 2 cm

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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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