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Late autumn, early winter model mayhem


Typhoon Tip

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  On 12/4/2017 at 7:15 PM, dendrite said:

Can they explode north of 40.5 or is that the cutoff?

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They can actually explode anywhere honestly depending upon the H5 dynamics, but if you really want a juiced up storm, look at the ones that travel over or south of the benchmark, they get aided by static instability caused by the arctic air traveling over the extremely warm Gulf Stream.  Right now the water temps south of Long Island are close to 55-60F

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  On 12/4/2017 at 7:18 PM, USCAPEWEATHERAF said:

They can actually explode anywhere honestly depending upon the H5 dynamics, but if you really want a juiced up storm, look at the ones that travel over or south of the benchmark, they get aided by static instability caused by the arctic air traveling over the extremely warm Gulf Stream.  Right now the water temps south of Long Island are close to 55-60F

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40.5 is technically north of the BM meat.

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  On 12/4/2017 at 7:19 PM, USCAPEWEATHERAF said:

yes I know, I did to account for the waters north of the Benchmark

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Hey James you ever look at these on Tropical Tidbits under North Atlantic  then thermodynamics, they are pretty useful for determining how much energy is available. Energy is not always available, just because the water is warm, need a lot of factors to induce use.

gfs_thdv_atl_25.png

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  On 12/4/2017 at 7:27 PM, Ginx snewx said:

Hey James you ever look at these on Tropical Tidbits under North Atlantic  then thermodynamics, they are pretty useful for determining how much energy is available. Energy its not always there, just because the water is warm, need a lot of factors to induce use.

gfs_thdv_atl_25.png

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Judging by that map, there is plenty of energy available

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EPS looks pretty good for this weekend...clearly a lot of timing differences though...it kind of has a continuous strung out low from late Friday night into Saturday night before becoming a bit more consolidated Sunday morning. But its def close enough for some accumulating snow it looks like.

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  On 12/4/2017 at 7:44 PM, ORH_wxman said:

EPS looks pretty good for this weekend...clearly a lot of timing differences though...it kind of has a continuous strung out low from late Friday night into Saturday night before becoming a bit more consolidated Sunday morning. But its def close enough for some accumulating snow it looks like.

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will be nice to have flakes flying all weekend, great weekend to get the Tree and lights up. In da mood

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  On 12/4/2017 at 7:44 PM, ORH_wxman said:

EPS looks pretty good for this weekend...clearly a lot of timing differences though...it kind of has a continuous strung out low from late Friday night into Saturday night before becoming a bit more consolidated Sunday morning. But its def close enough for some accumulating snow it looks like.

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Over the next few days, The weekend systems should become clearer.

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  On 12/4/2017 at 7:38 PM, Ginx snewx said:

 Still bottom 10%

Unrelated To your reduction rule. Neg  850 U wind anomalies are a good thing right?? .......

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Positive U is "normal" flow, so west to east. Negative U is east wind. East wind: better moisture transport in the lower levels and a robust mid level low, slower system if you are looking at the upper levels (i.e. closed off all the way 300 mb). 

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  On 12/4/2017 at 7:44 PM, ORH_wxman said:

EPS looks pretty good for this weekend...clearly a lot of timing differences though...it kind of has a continuous strung out low from late Friday night into Saturday night before becoming a bit more consolidated Sunday morning. But its def close enough for some accumulating snow it looks like.

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There it is.. days and days of snow. Winter kickoff in grand style 

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  On 12/4/2017 at 7:51 PM, OceanStWx said:

Positive U is "normal" flow, so west to east. Negative U is east wind. East wind: better moisture transport in the lower levels and a robust mid level low, slower system if you are looking at the upper levels (i.e. closed off all the way 300 mb). 

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 Thanks Yea it was rhetorical question to those who are on the cold and dry bus, see U winds on the Euro and GFS kids

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