Quote:
Originally Posted by
robbo mcs 
Hi,
Actually you are wrong. There is not an established el nino at the moment. The southern ocean oscillation index is actually neutral at the moment, not established one way or the other. The trend is towards el nino, but not yet established
Cheers
Robbo
According to the NOAA, there is (and has been) a weak El Nino throughout the summer of 2009 and it is expected to strengthen:
http://www.cpc.ncep.noaa.gov/products/analysis_monitoring/enso_advisory/ensodisc.pdf.
For the OP, that can mean a rough season in the NW. On one hand you get moisture, but the problem can be that the freezing levels end up being too high and you get rain in the mountains (and mud slides in the passes). It all depends on the strength of El-Nino.
If I still lived in Seattle, I'd be hoping for the best and expecting the worst. I'd be planning some trips out of state, watching Mt Baker a lot more, and generally trying to lower my expectations of getting any skiing in before Christmas. The good news is that most of the time El Nino doesn't completely ruin the season so you should have still have some good turns.