Thursday, January 29, 2009

Quiet conditions until a possible Blizzard next week

While portions of the country dig out from a major ice and snow storm. An even better storm may be in the works that would be the big daddy to the previous storm. As I mentioned on the January 19th blog the trough east of Japan was starting to develop and would signal a trough along the east coast within 6-10 days of it maturing. That would mean the start of February and the models are all on board for a major trough to develop in the east. As all three jet streams have a chance to phase into a blockbuster storm up the Appalachians or just to the east of them. The upper level pattern is resembling them of the blockbuster storm know as the Superstorm or Blizzard of 1993. Which was one of the worst winter storms of the century with crippling snow and hurricane force winds. Now right now I'm not predicting that or anything up to the level but its an eye opener when you see things like this come together. Here is an comparison of the 1993 500mb map a day before the storm and here is the map predicted in 63 hours from now. Here is the latest GFS model 92 hr. Surface map with two examples of storm tracks. Track #1 is an stronger storm that phases all three jet streams as the low turns more northward as it deepens. Track #2 is probably the more likely storm track. Which takes the low more east then north as the upper levels especially the Arctic Jet stream is slower to phase together. So the low pressure slowly deepens until it hits the warmer Atlantic coast. As the warm coastal waters act like a natural baroclinic zone to strengthen and attract the storm to. Both of the storm tracks are subject to change but both yield very heavy snows and possible severe weather for the southeast coast. Blizzard like conditions will develop but will it be across the Ohio Valley and along the west side of the Appalachians or will it be on the east side of them? This has big potential and will be watched closely over the next couple of days. If you live east of the Mississippi River you'll need to watch closely to the weather forecast over the next week. This could produce heavy snow from Tennessee northeast to Maine with blizzard conditions.

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