NAO, PNA and La Nina Are Just Ruining Our Winter
Dec 12, 2011; 9:36 AM ET
Discussion
Videos will resume on Wednesday when I am back in the office. In the meantime, the weather pattern, while stormy, is not the one snow lovers in the eastern part of the country want to see prior to Christmas.
Here is why....
La Nina - Remains weak, so pattern remains typical of a La Nina with the cold weather in the West and northern Plains and the warmth across the East. The storm track has been from the southwest to the western Great Lakes.
NAO - North Atlantic Oscillation remains positive, so no blocking and therefore no East Coast storms for major snowstorms. When the NAO goes negative, watch out.
PNA - Pacific/North America Pattern remains neutral and now looks like it will go negative. What does that mean....trough and cold in the West and warmth/ridge in the East -- this is not good for snowstorms in the East, but Western ski resorts will be rejoicing!
I really don't see much in the way of changes to the current pattern. While we will see storms, especially this week, the snow problems will be limited to areas where the cold can hold its ground long enough to allow for some snow. I do think the western Great Lakes and northern Plains have the best chance of snow prior to Christmas.
I know a lot of you been looking at the storm around Christmas. Again, until we can get any of these indices to change, I would not get all that excited for major snowstorms in the eastern part of the country. It surely is a big change from the past two years.
What sucks for us in the east is good for the west..we will have our day..hopefully sooner than later...keep watching for the NAO to go neg..
http://www.cpc.ncep.noaa.gov/products/precip/CWlink/pna/nao.fcst.gifDoesn't seem to be too big of a deal if you were up at any of the areas from SS thru Canaan & up to 7springs...Snowy & Cold today but what about x-mas?..Could be a rain to snow event(late x-mas/mon morn) for the high Country (GFS Model)Euro model brings cold in earlier..not too exciting before then.