The Weather Network

The Weather Network

March 04, 2009 12:42 ET

The Weather Network Spring Forecast: Roller-Coaster Pattern Continues for Eastern Half of Country

OAKVILLE, ONTARIO--(Marketwire - March 4, 2009) - After a winter which featured dramatic swings in the weather pattern across the country, spring will begin in much the same way for Ontario, Quebec and Eastern Canada.

Temperatures and precipitation in Western Canada are expected to settle into a normal pattern overall, with slightly cooler than normal temperatures for coastal British Columbia. The path of the jet stream will bring above normal precipitation to Southern Manitoba and Northwestern Ontario as spring storm systems pass directly through the region. Farther east, large swings in temperatures are likely from Ontario through Quebec and the Maritimes with the likelihood of some powerful early spring storms for Atlantic Canada. Overall however, temperature and precipitation values are expected to average out close to normal. The jet stream pattern for the spring months will bring above normal temperatures to Canada's northern regions around Hudson Bay.

"Spring, like fall is a transitional season, and wild swings in temperature are common east of the Rockies as warmer air from the south duels with arctic air that is often reluctant to give up its grip on many regions," says Chris Scott, Forecast Operations Manager with The Weather Network. "Early spring can be a stormy time in many parts of Canada, but increased heating from the sun always wins the battle in the end as most regions look forward to fair conditions by the last half of April. This spring fits the same pattern, and with weakening La Nina conditions in the equatorial Pacific Ocean, we expect a typical transition into spring across the country."

What is "La Nina"?

La Nina is one part of the climate cycle called the El Nino/Southern Oscillation. It is characterized by cooler than normal sea-surface temperatures in the equatorial Pacific Ocean that endure for several seasons. La Nina, and its counterpart El Nino, have a large impact on the jet stream and weather patterns around the world.

The Weather Network 2009 spring programming

March 30th marks the arrival of new seasonal programming on The Weather Network. The Lawn and Garden, Pollen and UV reports will be returning to the television service. All reports will also be available 24/7 on theweathernetwork.com, with many also available on the go at mobile.theweathernetwork.com.

Spring Pollen Levels

The weather has a major influence on the type of allergy season sufferers can expect. Different types of trees have adapted to cope with different environmental factors, which results in pollen seasons varying significantly from year to year. A warm spring may trigger pollen production to begin earlier, whereas a cool and damp spring will delay or lessen the pollen in the atmosphere. Location also plays a large part, a region which generally experiences a lot of rainfall such as the Lower Mainland of British Columbia will not have as significant a pollen season as would drier regions. Visit the Health & Environment page at theweathernetwork.com for details on pollen levels in specific cities.

Provincial Breakdown

British Columbia: The majority of British Columbia will experience normal conditions. The first half of the season will bring below normal temperatures that are expected to balance out by May, with the exception of the coast where the pattern of the jet stream will result in below normal temperatures overall. Precipitation for the province will be near normal for the season. Southern and central interior regions of the province will experience localized areas of wetter than normal conditions through to May.

Prairie Provinces: The majority of the Prairie Provinces will see normal temperatures and precipitation. Southeastern Saskatchewan and Southern Manitoba are expected to see above average precipitation.

Ontario & Quebec: Near normal temperatures will dominate the region. Above normal temperatures are forecast for far northern regions of the two provinces. Above normal precipitation is expected from Northwestern Ontario through extreme Southwestern Quebec.

Atlantic Canada: Near normal temperatures and precipitation are forecast for the region.

Northern Canada: Near normal precipitation is expected for Canada's north with above normal temperatures for Eastern Nunavut. Near normal temperatures are forecast elsewhere throughout the region.

For complete details on the spring outlook and national weather maps, please watch The Weather Network or visit theweathernetwork.com.



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The Weather Network's Spring 2009 Forecast
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Region Temperature outlook Precipitation outlook
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British Columbia Slightly below normal along Near normal across the
coastal BC. Near normal province.
elsewhere.
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Alberta Near normal across the Near normal across the
province. province.
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Saskatchewan Near normal across the Above normal for extreme
province. southeastern portions of
the province. Near normal
elsewhere.
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Manitoba Above normal for the Expect wetter than normal
northeastern portion of the conditions around
province. Near normal southern parts of the
elsewhere. province. Near normal
elsewhere.
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Ontario Above normal for northern Expect wetter than normal
parts of the province. Near conditions in the
normal elsewhere. northwest, northeast and
central regions. Near
normal elsewhere.
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Quebec Near normal for most of the Near normal across the
province except the far province, except slightly
north where it should be above across the extreme
slightly warmer than southwest.
normal.
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The Maritimes and Near normal across the Near normal across the
Newfoundland & region. region.
Labrador
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Yukon, Northwest Near normal across the Near normal across the
Territories, Northwest Territories, region.
Nunavut Yukon and western regions
of Nunavut. Above normal
for the rest of Nunavut
including Iqaluit.
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