Cool weather will gradually give way to a warm pattern in eastern Canada next week as the last in a series of chilly troughs gets pushed out.
Highlights into next week
1. Parts of southwestern Ontario could see a cluster of heavy thunderstorms coming through very late tonight into Wednesday morning with plenty of lightning. This includes the city of Windsor.
2. Heat will surge into the southern Plains Friday with afternoon temperatures reaching at least 28 degrees in many areas and 30 degrees in a few spots. A much cooler pattern will return by the middle of next week.
Projected temperature anomalies for Sunday in degrees F. from the GFS model ensemble..
3. Strong to severe thunderstorms are possible Saturday afternoon and evening from southeastern Saskatchewan through southern Manitoba. Does not look like a setup for tornadoes at this time.
4. Very warm period shaping up from southern Ontario through southern Quebec from Monday to at least Wednesday next week with areas away from the lakes reaching at least 27 C.
5. Persistent troughs setting up over Atlantic Canada through the end of this weekend will keep that region cool with showers from time to time.
6. British Columbia will see cooler than normal temperatures from this Friday into at least the first half of next week with a series of Pacific fronts bringing some showers from time to time. However, signs still point toward a much warmer and drier pattern setting up in June.
7. No major, widespread rainstorms expected across southern Canada for the next week.
8. The threat for a freeze is now greatly diminished for southern Ontario, Quebec.
Some needed rainfall for southern Ontario this week.
Mild air masses likely to outnumber the chilly air masses for a good part of October.
Jet stream pattern across North America will become amplified across North America into next week, which means more extremes in weather.
Warm weather will dominate in the eastern half of the country for the next week. Pattern change possible during the last week of September.
The jet stream will strengthen from the Pacific across southern Canada over the next 1-2 weeks which will keep any sustained chilly/cold air masses up across western Alaska and eastern Siberia.
The latest clues to the long range into the month of October.