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December Pattern Disco- 2013


Damage In Tolland

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Scott, it appears energy vorticity max tries to round the base of the PV trough over Hudson Bay and moves into the US through MN and through the Great Lakes into the Northeast.  Right now the GFS shows it as a frontal low developing along the baroclinic zone just off the East Coast, however the frontal low really begins to develop out to sea.  What are your thoughts on the 18z GFS so far?

 

Which time? at hr 126?

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00z and the 12z suites of the foreign and american models all show this potential wrap around energy lobe from the Polar Vortex over Hudson Bay towards hour 120, moving through the Great Lakes and Northeastern US, but its not far enough south to make a difference on a potential snowstorm after the December 9th threat.  Still time for things to change as the baroclinic zone is juiced up.

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Hey James I'm not a big fan of these follow up lows. I think the 18z gfs is too aggressive with this based on past experience. I could be wrong, but my money is on that wave not occurring.

 

The thing is, most models have this energy coming out of Manitoba, Canada and rounding the base of the trough by 120 hours and entering the NE US by 126 hours.  If model trends were to favor a stronger vorticity max, then I could see the second frontal wave developing, but right now its a toss up and the odds aren't really for it

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Those discussing the 00z op weren't discussing the 12z.

Looks like no real changes...we're going to ride the line so it's no surprise the op runs are this chaotic from run to run.

 

Well to my weenie eyes, it looked like the ridging well south of AK and subtle height rises again by the Aleutians are helping.

 

But yes, we ride the line and relaxation is certainly possible.

 

In the meantime, dam cold next week.

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