As I said earlier, based on current observations and the latest computer ensemble ENSO forecasts, it appears that the El Nino this fall and winter will be a weak one at best.
This is certainly not etched in stone as things can change between now and November, but this is our best forecast for El Nino right now. The strength and position of an El Nino is quite important to the forecaster.
Of course, the El Nino is not the only thing we factor into the winter forecast. We look at analogs, model and observational data must factor in many other natural oscillations. Some of other critical oscillations such as the NAO (North Atlantic Oscillation) and the AO (Arctic Oscillation) are nearly impossible to predict this far out and can fluctuate from one phase to another during weeks time.
Below are the composite temperature and precipitation anomaly impacts from a typical weak El Nino. These maps average out the weak El Nino winters of 1963-64, 1969-70, 1976-77, 1977-78 and 1987-88. Courtesy of Environment Canada. **Keep in mind, other shorter term oscillations (such as the AO, NAO and PNA) can mask the potential effects of an El Nino or La Nina.
You can follow me through the winter on my twitter @BrettAWX. I will be doing more videos on AccuWeather.com once again as winter approaches.
My thoughts on the snow through Tuesday in the East and West.
Other than a blast into western Canada next week, most of the Arctic air will remain north of the Arctic Circle into December with just brief intrusions while mild, Pacific air takes hold from west to east.
Still happy with my old snow map.
Accumulating snow this weekend for parts of southern, central and eastern Ontario.
Wild storm in the West through Tuesday. A little snow in the east for the weekend?
The latest clues to the weather pattern over the next several weeks.