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December 2020 Discussion


40/70 Benchmark
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4 minutes ago, Sey-Mour Snow said:

Snow maps only have a chance of verifying in snowy climates like New England.  Any map that shows snow over Richmond is going to be overdone 99.9% of the time. 

 


In  fact 2  years  TODAY in RIC  had  12-16" of snow
NWS  went   1-3 " 

 what is worse is that   ALL of the model   data with 72 hrs EXCEPT for the GFS has  HUGE   snow amount there  

so its   the mentality   that  thinks  well that never happens    there  which is  the problem 
hence  the reason  why  NWS    and all 3 TV stations   spent the next 4  days issuing apologizes

 

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Heh ... at least it keeps the wave open at D7 passing the the wind max thru the upper MA and S of NE ... That's a reasonable good fit - problem is...getting to that point first.  That D4 --> 5 ...well, assessing what's coming off the Pacific ...let's get that ironed out first. 

I mean this thing comes from well west of California to S of NS and the wind max's trajectory doesn't really vary in the N-S plain by more than 1K naut miles...  pretty cool actually - like a rifle wave ... 

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Just now, DTWXRISK said:

 As much  as I  Want  those snow maps to be right  for NYC   ne NJ coastal  CT  ..  the    surface temps are  NOT great




 

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Its going to be a call that will need to be made by staring at the sounding the night before.....like our last event in interior eastern MA.

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1 minute ago, 40/70 Benchmark said:

Its going to be a call that will need to be made by staring at the sounding the night before.....like our last event in interior eastern MA.

mid-levels are way colder...so the only thing looking at soundings will matter for is whether the ratios are like 10 to 1 or 18 to 1....like a normal snowstorm.

 

Tha is assuming of course that something like the Euro/GFS are semi-close to reality.

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1 minute ago, ORH_wxman said:

mid-levels are way colder...so the only thing looking at soundings will matter for is whether the ratios are like 10 to 1 or 18 to 1....like a normal snowstorm.

 

Tha is assuming of course that something like the Euro/GFS are semi-close to reality.

I mean down there, not here.

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