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March 6-8th Ocean Storm Discussion Part II


free_man

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Wow at the GFS... Verbatim, probably a warning event for the entire state of CT/RI/MA/NH and much of Maine and Vermont... Looks like it's cold enough for all snow down here, might have some trouble accumulating, but it looks like everything except the immediate surface is OK for down here. Someone correct me if I'm wrong.

 

I almost feel like at this point the EURO has to come north, if it dosen't, this might be one of the largest differences between the GFS and EURO ever at this time...

 

I'm giving the EURO 12z to catch on, and the GFS 18z to back off. If after 18z they don't have some sort of remote agreement, than it's all out chaos, and I almost feel like mets start having to pay attention to the GFS, because on the chance that it's right, and a blizzard comes in unforecasted, that could be a major problem. With something of this magnitude possible, the people have to be aware.....

 

-skisheep

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Well...it's tempting to say this would be the last hurrah of the winter but ...heh, the tele's are flagging -EPO/-NAO right out through the end of week 2!   This is true from both the Euro and GFS camps.   

 

This could extend bowling season -

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To amend, the only time the correction didn't occur or that the GFS wasn't amped enough was the huge blizzard.  I still view this as more of a hit vs miss scenario pending the euro/ggem vs historic vs epic....which to me means we discount the GFS and shift things SE until the other models collectively blink.

 

GFS was too far SE in 12/29 coastal as well.

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Frozen ground and snowcover around here will help to support snow accumulations, the sun angle sucks though.

 

Today's conditions make a snow storm seem reasonable--very winterlike 28.3/20 with strong NW winds.  Just went out to get some wood--a bit nippy to be sure.

 

once you get to maine's longitude, the difference in precip cutoffs between the gfs and euro increases to 700 miles

 

Just a minor difference.

 

Sun angle is not an issue at this lat until the latter portion of the month.

 

I don't buy that, Ray.   It all depends on the other conditions at play.  As I said in a post yesterday, at this time of year the angle is prohibive of big snow events (Oct '11 and April Fool's storm huge examples of that), but it certainly can and does inhibit accumulations that would not be the case in Dec-Jan.

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GFS was too far SE in 12/29 coastal as well.

 

I forget that one because I wasn't here was up north.  Seems like in the really big events it's not amped enough, based on all the other guidance right now we still have more of a SNE system right now...so my thought is until proven otherwise assume the OP GFS is too amped.

 

GGEM/UK/NAM and presumably a 12z Euro compromise would be the way to go if the GFS is far NW.  JMHO

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Again... should the GFS go on to prove more right than wrong, there most likely will not be any given cycle where all the models just 100% concede.  They'll fight while slowly capitulating across a few cycles.

 

I think this GGEM and UKMET ...sort of elucidate that.  If the Euro comes N this is a huge red flag imo -

 

Also, looking at this more detailed:  This type of synopsis with the oper. GFS is very "shadow" appealed.  Some interior N-S oriented valleys may get some meso boning -

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Lets rehash all the sun angle arguments:

1. It has a major effect in March if the precipitation rate is light and cloud decks are thin.

2. It has almost no effect when 1/4 +SN is falling and fairly minor even with 1/2 SN falling.

3. There is still almost 13 hours of darkness at this time of the year.

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Today's conditions make a snow storm seem reasonable--very winterlike 28.3/20 with strong NW winds.  Just went out to get some wood--a bit nippy to be sure.

 

 

Just a minor difference.

 

 

I don't buy that, Ray.   It all depends on the other conditions at play.  As I said in a post yesterday, at this time of year the angle is prohibive of big snow events (Oct '11 and April Fool's storm huge examples of that), but it certainly can and does inhibit accumulations that would not be the case in Dec-Jan.

Sure....during very light rates of fall, but in any event worthy of mention, it will not....perhaps a bit on asphalt.
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Lets rehash all the sun angle arguments:

1. It has a major effect in March if the precipitation rate is light and cloud decks are thin.

2. It has almost no effect when 1/4 +SN is falling and fairly minor even with 1/2 SN falling.

3. There is still almost 13 hours of darkness at this time of the year.

Exactly.
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Lets rehash all the sun angle arguments:

1. It has a major effect in March if the precipitation rate is light and cloud decks are thin.

2. It has almost no effect when 1/4 +SN is falling and fairly minor even with 1/2 SN falling.

3. There is still almost 13 hours of darkness at this time of the year.

 

 

Even simpler, this is not April, it March, before the Equinox - 

 

yes it's factorable, but scaling exercise would show that it is among the smaller factors on Mar 4.   April 4, much bigger.   

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