Originally posted by rdewey+--><div class='quotetop'>QUOTE(rdewey)</div>
<!--QuoteBegin-Mickey Ptak
From what I have observed, from this year alone, is that the cold core setups we have had in 2005 where always stacked on top of themselves at the verious levels. So that is were I have come up with the \"cold core low\".
Mick
I don't know if being "cold core" has anything to do with the breaking of events. I think the biggest breaker was the fact that the
shortwaves became cutoff and vertically stacked - at which point most systems begin the weakening process / shear out. That would mean the wind field would become less organized, vorticity advection begins to cease as the system slows, and any convergence would begin to subside as forward momentum of cold fronts / drylines slows down.
An example of a true "cold core" low would be a winter storm that develops north of the baroclinic zone...
EDIT: After reading your (Mick's) other post in the "Upcoming active week" thread, I can see that's the point you were trying to make - vertically stacked and closed off systems aren't really good producers... Although the GFS shows this system as being only weakly closed - but it's strongly positively tilted...[/b]