Tuesday, March 20, 2012

AccuWeather.com - Meteo Madness | Wild Warm Winter Theory, Plus Snow Cover and Storms


Mar 20, 2012; 7:08 AM ET
Comments
1. I may be nuts but I been trying to figure out why this winter was so warm and why the spring is now just amazingly warm. I stumbled upon something that may or may not be relevant. Below is an image of the Pacific Ocean's temperature anomalies and the debris field from the tsunami that hit a year ago. Notice how the two match up almost perfectly. The theory is that the debris floating in the Pacific caused a large area of warm water in the north Pacific, understanding that the ocean and atmosphere are coupled so if one changes the other changes; i.e. La Nina and El Nino's as perfect examples. So, if that area of the Pacific is warmed it will cause a natural boundary for storms to develop along. The last 90-day storm tracks show many of the Pacific storms developed right along that zone. In regards to the jet stream, instead of getting the typical split flow during the La Nina we had a roaring zonal flow across the north Pacific which basically did not allow the jet to buckle across the eastern part of the country and disrupted any blocking. So that's my theory. Maybe it's nonsense but it seems to have some merit.
2. The other thing that amazes me is the lack of snow cover across the county in March. Typically you have a lot of snow cover left across the eastern part of the country this time of the year, but right now all we have is a patch across parts of Vermont, New Hampshire and northern Maine that is disappearing quickly. Also, notice the lack of snow cover across central Canada. I bring that up because any cold air masses coming down from Canada will not have any snow cover to go over to get modified so while the computer models may show cold air coming, the end result may be an air mass that is more normal in regards to temps.

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