AccuWeather.com

Canadian Weather Blog

Significant Pattern Change the Last Week of March

Mar 14, 2010; 7:34 PM ET

This is my latest interpretation of the ECMWF weekly long range model output for North America......

The model indicates a significant pattern change across Canada for the last 10 days of March as the high pressure blocking that has persisted across much of central and northeastern Canada during the winter is projected to completely break down during the period, which means temperatures should go back to or slightly below normal for large parts of northern and central Canada.

Mean pattern for the week of March 22-28

--Warmer and drier than normal from Alaska through British Columbia and the Pacific Northwest.

--Below-normal precipitation across the Prairies.

--Slightly colder than normal over north-central Canada, and colder than normal over the southern Prairies.

--Chilly pattern over the central U.S. Plains, and wetter over the southern and central Plains.

--Slightly wetter over California.

--Colder and stormier from the Midwest and Great Lakes into Ontario and western Quebec.

--Warmer and drier over Florida.

--Temps and precip close to normal over the eastern United States.

--Temperatures above-normal over Atlantic Canada with near-normal precipitation amounts.

March 29- April 4

Another pattern change.....

--Rather stormy over Alaska.

--Cooler and wetter than normal over the southwestern United States.

--Temperatures and precipitation near-normal over British Columbia and the Pacific Northwest.

--Above-normal temperatures and below-normal precipitation from the Prairies through eastern Canada.

--Above-normal temperatures from the southern and central Plains through the Southeastern states.

--Above-normal temperatures and near-normal rainfall from the Midwest through the Great Lakes and Middle Atlantic region.

--Warmer and drier than normal over the Ohio Valley and Northeast.

--Temperatures close to normal and drier over the Maritimes.

--Drier with near-normal temps over Newfoundland.

April 5-11

Very little change from the previous week, except.....

--Milder over British Columbia.

--Well above-normal temperatures for Ontario.

--Above-normal precipitation from the northern U.S. Plains to the eastern Prairies.

--------------

I am working on my spring forecast, and it will be posted before the week is over.

blogs Home >

Comments

Comments left here should adhere to the AccuWeather.com Community Guidelines. Profanity, personal attacks, and spam will not be tolerated.

More Brett Anderson

Long Range Model Indicates Early Spring for Many

Feb 10, 2012; 11:42 AM ET

This is my latest interpretation of the weekly ECMWF long range forecast model, which now goes out into the second week of March.

Storms Bearing Down on Atlantic Canada

Feb 9, 2012; 4:10 PM ET

A rapidly intensifying storm well southeast of Nova Scotia will pass close to Cape Race, Newfoundland early Friday morning.

Cold and Some Snow Headed for the East

Feb 7, 2012; 1:53 PM ET

The weather map across Canada today is about as uneventful as you can get for the early part of February, but things will change late this week, especially in the East.

Is Spring Right around the Corner?

Feb 3, 2012; 11:10 AM ET

Is Spring right around the corner? According to the updated ECMWF weekly model, it is for the eastern two-thirds of Canada and the U.S.

Comparing the Great Lakes' Ice Coverage to Last Year

Feb 2, 2012; 3:32 PM ET

What a difference a year makes!

My Forecast for February

Jan 31, 2012; 3:27 PM ET

Here is my outlook for February 2012 across Canada.

Updated Storm Snowfall Map

Jan 31, 2012; 10:08 AM ET

We made some changes to the snowfall forecast for eastern and Atlantic Canada through Wednesday night.

Eastern Snowfall through Tuesday Night

Jan 30, 2012; 12:22 PM ET

I just drew up this snowfall forecast map that runs from this afternoon through Tuesday night.

Arctic Air Headed for Eastern Siberia

Jan 25, 2012; 1:33 PM ET

Signs indicate that Arctic air will continue to back away and head to the other side of the pole once again.

Random Thoughts

Jan 24, 2012; 3:26 PM ET

Winter has retreated to the far north once again, but will it be back?

Updated Weekly Long Range Model Forect

Jan 20, 2012; 3:19 PM ET

This is my latest interpretation of the ECMWF long range forecast.

Snowfall Updates

Jan 19, 2012; 1:35 PM ET

The weak clipper storm coming through eastern Canada this evening then into the western Maritimes late tonight....

Late-Week Snow Event in the East

Jan 18, 2012; 1:50 PM ET

Just put together this initial snowfall forecast map for the storm tracking from the Mississippi Valley to the middle Atlantic coast Friday into Saturday.

Update on Snowstorms

Jan 17, 2012; 1:37 PM ET

Update on the Pacific Northwest storm and the eastern Canadian storm...

Storm Snowfall Forecast Maps for West and East

Jan 16, 2012; 12:54 PM ET

This is my initial forecast for the storm system that will impact parts of eastern Canada and the Maritimes from early Tuesday through Wednesday.