El Nino's grand collapse this past spring into a dominant La Nina pattern was very similar to a Stock Market Crash in terms of the mayhem caused worldwide. Weather patterns literally locked in place causing some of us to roast, others, to shiver, and areas like Pakistan to drown in rainfall. An extremely interesting aspect of this La Nina was the global lack of hurricane production. Even though the Atlantic was well above average the total cyclone production as calculated in terms of Accumulated Cyclonic Energy (ACE) is at a 33 year low.
Global AAM just got a boost as mountain ranges are literally moving weather systems along in the deep tropics. Far to the north blocking high pressure formation is being promoted. This development is very important for 2 reasons:
- A destruction of the repetitive heat ridge which caused suffering in the US Southeast. Summer will soon be OVER.
- Easterly flow to the north combined with westerlies to the south encourage storm formation. We need to be on the lookout for a Nor'easter or tropical hybrid which brings wind and rain to the east. Another big reason to watch for a big storm is the coming of the NC State Fair!
This pattern looks like last winter. Source: NOAA Earth Science Research Laboratory. |
Winter 2009-10 featured fully developed versions of blocking in the North and a subtropical jet to the south. Source: NOAA Earth Science Research Laboratory. |
That's not "Fair"!!! Source: NOAA Air Resourced Laboratory |
More of "That's not Fair"? Source: NOAA Air Resources Laboratory |
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