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Thanksgiving Weekend Weather (Wed-Sun)


ORH_wxman

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Double? Well it's a first guess not final like 3 days out. :lol:

 

Understand the conservative measure, but I'm seeing things differently.   

 

This system ...even in a westward Euro track could snow 3 or 4" per hour prior to a flip with those jet mechanics being so immense. The 500mb left exit region collocates with a ginormous positive anomaly 300mb wind field/right entrance...That's ...like, what do we have say?!  My god -- thunderstorms would be envious of that. You could be +1C at 850 and snowing 1/16th of mile parachute visibility with occasional lightning. 

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Understand the conservative measure, but I'm seeing things differently.

This system ...even in a westward Euro track could snow 3 or 4" per hour prior to a flip with those jet mechanics being so immense. The 500mb left exit region collocates with a ginormous positive anomaly 300mb wind field/right entrance...That's ...like, what do we have say?! My god -- thunderstorms would be envious of that. You could be +1C at 850 and snowing 1/16th of mile parachute visibility with occasional lightning.

I agree, but it may tip as well quickly. 14" at ORH? Even the GFS won't do that. Respect the dryslot evident from 700-500mb.
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The new GFS has the Navy NOGAPS on it's side, though. That may lead to fun stress down the road when that becomes the operational GFS.

That's what bothers me. I won't get worked up from one example, but that's the model replacing the old GFS so I would hope it does better with east coast cyclogenesis.

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I agree, but it may tip as well quickly. 14" at ORH? Even the GFS won't do that. Respect the dryslot evident from 700-500mb.

 

 

There could be something like 6-8" at ORH over to ASH and then a hellacious pellet-fest for about 2-3 hours before another flip to ZR and possibly cold rain depending on exact track....if it was something to closer to the Euro.

 

 

One thing we may have to watch as we get closer, is if models start "seeing" that weenie high developing out ahead of it...it could help feed in some drier air and lower the temps some both in mid-levels and at sfc...so I wouldn't be shocked if the solutions cooled slightly with even the same tracks.

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Taken verbatim the dry slot stays E of a PVD/BOS line. Course, that is the GFS...  but he GFS QPF totals would supper 14" if it snows long enough at ORH with ease.  

 

Certainly will be interesting to see how this plays out.  I'm siding colder though...with dynamically assisted, very intense thermal packing between 900 and 800mb levels where +4C is bunched up again -4C across unusually short distances. 

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There could be something like 6-8" at ORH over to ASH and then a hellacious pellet-fest for about 2-3 hours before another flip to ZR and possibly cold rain depending on exact track....if it was something to closer to the Euro.

One thing we may have to watch as we get closer, is if models start "seeing" that weenie high developing out ahead of it...it could help feed in some drier air and lower the temps some both in mid-levels and at sfc...so I wouldn't be shocked if the solutions cooled slightly with even the same tracks.

With 925 staying cold, I could see that happening. It won't be snow to rain out that way, that's for sure. Big transition zone if the euro happened. I could see this literally being a 6 hr dump and then mix of IP/FZRA/FZDZ etc.
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There could be something like 6-8" at ORH over to ASH and then a hellacious pellet-fest for about 2-3 hours before another flip to ZR and possibly cold rain depending on exact track....if it was something to closer to the Euro.

One thing we may have to watch as we get closer, is if models start "seeing" that weenie high developing out ahead of it...it could help feed in some drier air and lower the temps some both in mid-levels and at sfc...so I wouldn't be shocked if the solutions cooled slightly with even the same tracks.

Watch them WBs guys
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John it dries out above 700 quickly after 3z. At least that was 12z and I assume 18z accentuates that even more if mid level lows went west. The temp profile below that is tough to support more than crappy flakes or FZDZ until the mid level low moves east again.

 

The GFS QPF charts put out three, separate 3-hourly totals exceeding .5" liq equiv.

 

-- so you're outguessing the output? Okay, but those totals are completely acceptable considering this system's source/origin, combined with all the mechanics I've be observing with this thing.

 

And actually, the synoptic evolution at 700mb as provided by NCEP's Model and Analysis page show RH exceed 70% west of PVD/BOS line the whole time the low makes it's pass... Not sure what you are looking at.   

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What a nightmare for travel,especially if hubs are effected Wed

Yeah, I'm supposed to be driving from western NJ to VA Beach on Wednesday. Not so worried (obviously) once nearing the Del Marva with this, but before hand, that's 100 miles spent in possible paste snow if using these colder runs.  

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