The latest update of the ECMWF long-range model is quite a change from the previous run, which was not unexpected as the model has been all over the place recently, but also the fact that there is a significant warming event underway in the stratosphere in the far northern latitudes which could eventually (in 10-20 days) translate to a widespread outbreak of cold weather for a large part of southern Canada and into parts of the U.S. as the Arctic and North Atlantic Oscillations go back into the negative phase.
Clearly, the model has trended colder since the last run, but it still likely has even more catching up to do over the next week or two.
In the meantime, many in the east will be able to enjoy a spell of milder weather next week.
Remember, you can also follow my comments on the weather pattern on my twitter page @BrettAWX
My look at the overall pattern across Canada for this week.
Some forecast model clues through the end of August and an update on global sea surface temperatures.
Tornado threat into Tuesday from southeastern Saskatchewan to northwest Ontario.
Latest weekly clues to the long range forecast through mid-August.
Major storm for the Prairies early next week could bring heavy rainfall and severe thunderstorms.
Severe thunderstorm threat later Thursday and a general look at the upcoming weather pattern.