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Model Mezzanine - April(Fools) General Model Discussion


FXWX

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With the caveat of changing wavelengths, this impending drop in the NAO, and AO is precisely what we need to make a euro-type amped/recurve solution feasible.

http://www.cpc.ncep.noaa.gov/products/precip/CWlink/pna/nao.sprd2.gif

http://www.cpc.ncep.noaa.gov/products/precip/CWlink/daily_ao_index/ao.sprd2.gi

The PNA wants to cooperate as well:

http://www.cpc.ncep.noaa.gov/products/precip/CWlink/pna/pna.sprd2.gif

That's a potent combination. Historically we see some really amped solutions with a longwave trough setup along the east coast and the above parameters.

I think we all should be watching this with more interest...

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The 12z GFS develops a lot more separation between the waves. Boy that's close to something

 

Big change from 6z. We'll see what it means. We are kind of in a situation with little wiggle room. Because the baroclinic zone is so far offshore..we need the low to come close for precipitation. However, having the baroclinic zone offshore ensures deep cold too. 

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Big change from 6z. We'll see what it means. We are kind of in a situation with little wiggle room. Because the baroclinic zone is so far offshore..we need the low to come close for precipitation. However, having the baroclinic zone offshore ensures deep cold too. 

 

 

Yeah it's gonna be tough to get a real system from this...much higher chance we see ULL snow showers or something.

 

It is certainly still far enough out though that maybe we can see some bigger changes occur to give us that extra spacing we need.

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heh, ...i don't see any conceptual difference between the last several cycles and this one, wrt to the GFS oper. and this week's ending trough evolution; and in fact, this below is pretty common among all guidance at this point.

 

there may be significant detail difference, but those don't appear to off-set the general appeal of nested, destructive wave interference going on in that bad boy. 

 

post-904-0-38713400-1459874507_thumb.jpg

 

the trough acting without resulting better cyclogenesis in this case connotes unsettled windy, cold ... instability snow and grapple flits from time to time should about constitute the sensible impact spanning that era of time.  

 

can something more come of it?   sure, ...but the above depiction(s) need to substantially modulate.  

 

i highly doubt it will at this point, due to persistence sometimes being one's best friend in this business. in this case, the persistence is the wave interference its self.  frankly, it's amazing there was an event yesterday at all - but that was an 'in-betweener' type system not associated with a L/W event, like the week end is.  

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The Euro looks like brush for far eastern areas on Sunday morning, but hard to tell based on the 24 hour panels.

 

The shortwave is impressive, but the lack of spacing is really make it hard for any conveyors to get going...so there's not a lot of precip and the sfc low has a hard time trying to gain latitude initially.

 

We'll need a fundamental shift in the wave spacing to change that. Otherwise this is probably flurries/occasional snow showers under the ULL.

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The shortwave is impressive, but the lack of spacing is really make it hard for any conveyors to get going...so there's not a lot of precip and the sfc low has a hard time trying to gain latitude initially.

We'll need a fundamental shift in the wave spacing to change that. Otherwise this is probably flurries/occasional snow showers under the ULL.

Agreed. Time is still on our side for some larger scale shifts to occur, so still worth keeping an eye on over the next day or 2.

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Agreed. Time is still on our side for some larger scale shifts to occur, so still worth keeping an eye on over the next day or 2.

 

Sort of. At 12z the first shortwave is initializing over Montana, so it's not like it will be disappearing. The second which dives in and phases with it is about to enter the west Canadian coast.

 

The third shortwave, which is the one in question on the GFS, is still up in the arctic.

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