Highlights for the rest of this week
--Threat of locally strong, drenching thunderstorms for western and southern Alberta Thursday afternoon and evening as weak disturbance meets up with a warm and more humid air mass.
--Thunderstorms will likely be more widespread from the Canadian Rockies through Saskatchewan and perhaps Manitoba Friday into Saturday as cooler air settles in aloft, creating an unstable atmosphere during the afternoon and evening both days.
--Temperatures will continue to average well above normal into the weekend from central Quebec and into a large part of Atlantic Canada. Also, having ocean water temperatures running 2 to 3 Celsius above normal doesn't hurt either. I expect water temperatures to continue to average well above normal surrounding Atlantic Canada through the summer. The greatest impact this will have is on nighttime air temperatures (higher humidity/more clouds keeps temperatures from falling all that much at night).
--The humidity will remain high from southern Ontario through the St. Lawrence Valley into this weekend thus giving dehumidifiers a nice workout!
--A ridge of high pressure will likely re-build over western Canada next week leading to a resurgence of very warm to hot weather starting from west to east during the Tuesday through Friday period. However, this air mass does not look as hot as the one we just dealt with in the West.
--The overall pattern across the northern Hemisphere appears to favor a return of a trough into eastern Canada, Midwest/Northeast U.S. late next week, which would bring temperatures back down slightly with an increasing chance of fronts with showers and thunderstorms. However, this trough will not stretch as far south as the one that has been in the East/Midwest recently so there should be less moisture available since there will not be much of a tropical connection.
--Temperatures should continue to average above-normal over a large part of Atlantic Canada into at least mid-month.
My latest interpretation of the weekly long-range forecast model.
A look at the weather pattern across Canada into next week.
This is the AccuWeather.com fall forecast for Canada, which includes the months of September, October and November 2014.
A pattern shift later next week and a look at the potential weather into mid-September.
Significant rain coming for Quebec and a look back at July.
Smoke and haze and a look at the long range into early September.