Saturday, November 8, 2014

Watching the -AO, winter may start early.

I've been super busy with little time to really scrape the data like I should, but I've got enough sources and people I chat with that I'm on top and wanted to throw out some information.

First, you've likely heard a little chatter about some snow chances next week. Some of the model data has shown it off and on while other models are all over the place. Getting snow in November is about as rare as March 25th snows, but now we've done that 2 years in a row. Now, odds are it's like nothing, but some of the model data drives a cold front through and then a week wave follows behind. That would be our best set up for an event in November. Odds are, we end up with no snow.

Like poetry in motion, the snowcover gain has trigger some events and the arctic oscillation is about to tank and we could be having a sudden stratospheric warming (Which ties into the -AO and high latitude blocking) Big cold comes in next week and the -AO could reach close to -4 on the scale they use. One key piece is once it tanks to a -4 or -5 it usually replicates itself once or twice.  So, the bottom now looks to be about 3.5 or so, just a bit stronger and we could be in a colder pattern for 6 weeks or so.. which runs us up through years end.

Will keep you updated, but December may be looking colder than I had anticipated.
Strong -AO, usually breeds ANOTHER severely negative -AO

No comments:

Post a Comment