ExpiredNews - Atlantic Canada Nor'easter: Eight weather terms you'll be hearing - The Weather Network


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There are a lot of weather terms being thrown around as Atlantic Canada braces for a powerful Nor'easter. Here's what some of them mean.
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"This is meteorological locker room talk describing the explosive deepening of a low pressure system where the central low pressure drops more than roughly 24 mb (hPa) in 24 hours (i.e. ‘birth’ of a ‘bomb’)," explains Weather Network Chief Meteorologist Chris Scott.

"Depending on the model you look at, the storm we're currently keeping an eye on is predicted to deepen by 35-50 mb in 24 hours."


"Wind-related impacts will be the greatest effect of this Nor’easter," says Weather Network meteorologist Monica Vaswani. "Models are consistently indicating rapid cyclogensis."

This is, essentially, a deepening of the low pressure system.

Cyclogenesis is defined as the development or strengthening of cyclonic circulation in the atmosphere -- "essentially, it's the genesis of a cyclone," says Weather Network meteorologist Daya Vettese.


A blizzard is defined as a severe snow storm that packs strong winds and low visibility. Environment Canada issues blizzard warnings when winds of 40 km/hr or greater are forecast to reduce visibility 400 metres or less due to blowing snow and/or falling snow for at least 4 hours. In northern parts of the country, a blizzard warning is issued when visibility is expected to be reduced for at least six hours.

TUNE IN FOR LIVE COVERAGE: Chris St. Clair will on location in PEI, Chief Meteorologist Chris Scott and Meteorologist Mark Robinson will be monitoring the storm from Cape Breton and Nathan Coleman will be on location in Halifax.


This storm will bring with it a risk of freezing rain over parts of northern Nova Scotia as warmer air aloft wraps back into the storm system.

"Warm air aloft is a warm air mass above an area of colder air," Grinter says.

"It's usually associated with a warm front overriding cold air ahead of causing mixed precipitation types like freezing rain and ice pellets."

Intense and dangerous Nor'easter to impact Atlantic Canada midweek
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Nor'easter coverage: Nine maps that explain everything
Prepare for quick burst of snow, sudden reduced visibilities in parts of Ontario Tuesday
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