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12/20-12/21 Moderate/Intense Clipper Event?


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this is amazingly frustrating.....it's bad enough when you get missed to the south.....the north....the east. but for godsakes this will be the third storm this winter where we're missed to...the WEST. wtf...lol

It makes it even worse that it's a clipper, the one storm we can usually rely on. Need to see the GFS, but it may be time for us to focus on Christmas Eve.

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this is amazingly frustrating.....it's bad enough when you get missed to the south.....the north....the east. but for godsakes this will be the third storm this winter where we're missed to...the WEST. wtf...lol

If it was the NORMAL miss to the west ( Storm tracking from TX to WI/Up of MI/Canada i could even live with it but this crap is for the birds. wow...

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It makes it even worse that it's a clipper, the one storm we can usually rely on. Need to see the GFS, but it may be time for us to focus on Christmas Eve.

meh.. This is not true ( clipper diving out of Canada ) clipper though. Other then a ugly wretched mess i am not sure what to call it. :lol:

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meh.. This is not true ( clipper diving out of Canada ) clipper though. Other then a ugly wretched mess i am not sure what to call it. :lol:

Yeah it is definitely not a true Alberta type clipper as they remain very progressive and an open wave aloft (track fast) and are in a pretty steady-state of cyclogenesis in the low levels. This system, besides deepening and closing off well past the typical Alberta Clipper (in terms of vertical depth), the low level latent heat release effects will hasten cyclogenesis and occlusion and eventual rapid weakening unlike a typical clipper. The dryness (lacks significant diabatic effects in the low levels) of typical clippers helps them remain in that steady-state.

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meh.. This is not true ( clipper diving out of Canada ) clipper though. Other then a ugly wretched mess i am not sure what to call it. :lol:

yea, this is not really a clipper event for us here in Ohio. The clipper/low is very far north. The precip associated with it, (assuming any makes it here), is strictly waa stuff.

by the way...fwiw, not much...i just looked at the jma on accuwx and it looks like the xmas storm is an exact duplicate of what is supposed to occur monday/tuesday. Only diff is the nw to se band of precip is a little further south.

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exactly, when i say miss, i mean miss as in all precip.

Well we do atleast have these to hang some hope on.. :scooter:

f87.gif

Yeah it is definitely not a true Alberta type clipper as they remain very progressive and an open wave aloft (track fast) and are in a pretty steady-state of cyclogenesis in the low levels. This system, besides deepening and closing off well past the typical Alberta Clipper (in terms of vertical depth), the low level latent heat release effects will hasten cyclogenesis and occlusion and eventual rapid weakening unlike a typical clipper. The dryness (lacks significant diabatic effects in the low levels) of typical clippers helps them remain in that steady-state.

Thanks. I really am lazy and thus do appreciate you taking the time to explain it all as i know many do enjoy reading it.

yea, this is not really a clipper event for us here in Ohio. The clipper/low is very far north. The precip associated with it, (assuming any makes it here), is strictly waa stuff.

by the way...fwiw, not much...i just looked at the jma on accuwx and it looks like the xmas storm is an exact duplicate of what is supposed to occur monday/tuesday. Only diff is the nw to se band of precip is a little further south.

It would not surprise me at this point. :lol: Nothing will till the Atlantic is finally cleaned out.

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Classic clipper for those that want to see one in motion.

http://www.meteo.psu...07/us0222j3.php

Note how it maintains an open wave status until it reaches the Atlantic 500-700 hpa with a low level cyclone (850/surface).

It is generally a rather steady and slow amplification of a disturbance as opposed to a rapid cyclogenesis event where the growth of the disturbance aloft is very non-linear.

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really nice hit for northern IL at 48hrs on the 0z GFS

the sfc low is also further southeast on this run than it is on the 18z and 12z runs.

okay. look for 1-3 " with WAA and then drizzle........gone by tues. eve, it's a Minny winter and is long overdue :snowman:

looked again: GFS...smokin...something....

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Even though the GFS is the outlier to the south, it's been trending in the NAM's direction slowly but surely each successive run. That makes me lean toward the NAM. Obviously the SREF is more inline with the NAM as well. The Canadian's handling of this is poor to say the least. The 12z RGEM forecast 2-3 inches of snow for parts of Iowa and Illinois less than 36hrs out, and then showed less than an inch in the same area on the new 00z. It's clearly lost all sense of reality with the pattern we're in now.

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nam and gfs still apparently off by a couple hundred miles on where the heaviest precip axis lines up across MN/IA. NAM and a few SREF members are close to bringing it north of MSP.

regardless, this is probably enough to have MPX hoist a watch tonight.

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