What will win­ter bring ?

Stanstead Journal - - FRONT PAGE -

The Ac­cuweather.com re­ports it’s go­ing to be a cold win­ter across a chunk of western Canada. Sev­eral arctic air masses should come down through Bri­tish Columbia and Al­berta. This win­ter could be one of the top three cold­est win­ters in the past 20 years for Vancouver and Vic­to­ria, Bri­tish Columbia. Edmonton, Al­berta, will likely be in the deep freeze for the fifth con­sec­u­tive win­ter. “Most of the win­ter will be fairly typ­i­cal from the St. Lawrence Val­ley re­gion to the Greater Toronto area,” Ac­cuweather Ex­pert Se­nior Me­te­o­rol­o­gist Brett An­der­son said. “How­ever, I do ex­pect one or two ma­jor snow­storms to af­fect the re­gion.” For On­tario, Toronto and Montreal, there will “cer­tainly be a cou­ple of blasts of arctic air com­ing down” to freeze the re­gion, An­der­son said. “That’s typ­i­cal of a La Niña, but [arctic blasts] don’t last very long; they come and they go.” There’s “cer­tainly go­ing to be some bit­ter cold com­ing down there in the mid­dle of win­ter.” La Niña is a phe­nom­e­non that oc­curs when sea sur­face tem­per­a­tures across the equa­to­rial cen­tral and east­ern Pa­cific are be­low nor­mal. The phe­nom­e­non of­ten pro­duces ex­treme cold out­breaks across western Canada dur­ing the win­ter due to the in­flu­ence it has on the jet stream. Snow­fall tends to be greater across On­tario and Que­bec in a La Niña win­ter, while there’s al­most al­ways un­usu­ally dry win­ter weather along the West Coast dur­ing

weak and mod­er­ate La Niñas. “Strong La Niñas can lead to wet win­ters along the West coast, but I am pre­dict­ing a mod­er­ate La Niña this win­ter,” An­der­son said. Across the coun­try, “it’s al­most a given” that north­east­ern Canada will have a milder win­ter com­pared You’ll see some fore­casts pre­dict­ing a cold, snowy win­ter in Bri­tish Columbia, but An­der­son said “it’s ei­ther one or the other.” Cold air doesn’t hold mois­ture very well. If it’s go­ing to be snowy, es­pe­cially in western parts of Bri­tish Columbia, “it’s usu­ally not go­ing to be ter­ri­bly cold, es­pe­cially in the moun­tains.” The past 10 to 15 win­ters have been drier than nor­mal across the Prairies, and that’s likely to be the same across a large part of the re­gion this win­ter. The ex­cep­tion, though, is south­west­ern Al­berta, which is good news for the win­ter sports en­thu­si­asts down there. A num­ber of Colorado lows will lead to above-nor­mal pre­cip­i­ta­tion across parts of On­tario into Que­bec. When it’s snowy, it’s dif­fi­cult to get too cold. There will be cold blasts, but it will be dif­fi­cult to get per­sis­tently cold in this area with this type of pat­tern. It will be drier than nor­mal in New­found­land and south­ern parts of Labrador. Most of the Prairies will also get less snow than nor­mal. Be­cause the Great Lakes are run­ning warmer than nor­mal, the ar­eas around it will have a greater amount of lake-ef­fect snow­fall as very cold air wraps in be­hind those Colorado lows.

Photo cour­tesy Accu Weather. com

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