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Jet stream causing abnormal weather pattern


Blocking pattern bringing less snow to Atlantic Canada and more snow to Europe
Blocking pattern bringing less snow to Atlantic Canada and more snow to Europe

Jill Colton, staff writer

December 22, 2010 — An unusual bout of weather is sweeping over parts of northern Canada and Europe all thanks to the jet stream.

Temperatures have spiked across Nunavut.
Temperatures have spiked across Nunavut.

The jet stream is helping to generate record breaking temperatures across parts of Canada's north and bringing cold conditions to countries in Europe.

A huge ridge in the jet is bringing warm weather to places like Nunavut, explains Patrick Cool a meteorologist from The Weather Network. Coral Harbour Airport recorded a record high of 3.3C last Friday. The last time the mercury came close to this was in 1963 when the thermometer climbed to 1.7C.

Places like Kugaaruk Airport, Resolute Airport, Rowley Island and Shepherd Bay Island also climbed to new record highs.

Newfoundland and Labrador are also feeling the effects of the ridge. Rocky Harbour was the hot spot across the country last week when the daytime high soared to 10.1C. Badger (8.5C) and Carwright (6C) were among several communities that shattered temperature records.

Heavy snow has piled up across Europe.
Heavy snow has piled up across Europe.

The warm conditions are expected to persist for Newfoundland. A retrograding low is bringing in a backdoor warm front. This helps usher in warm temperatures as it retrogrades south... explains Dayna Vettese, a meteorologist at The Weather Network.

The trough in the jet is also responsible for the significant lake effect snow that persisted for the last two weeks across southern Ontario, notes Cool.

Meanwhile, the jet stream is having an opposite effect on parts of Europe. The Greenland high is creating a deep trough in the jet. This is leaving an opening for Arctic air to flow across Europe resulting in colder weather and snow, says Cool.

Winter has tightened its grip on countries like the United Kingdom, Germany and Italy causing everything from flight cancellations to vehicle accidents due to icy roads.

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