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Christmas Storm VI


Cold Rain

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Euro out to 12. Not sure if the model will matter at this point so much for the details, but its got a still closed low at 12 in central Tex. Lot of qpf in Texas around the low. Nice amplification the western Central Canada. at 18 the low is coming off Houston. That doesn't look right. Already it went that far in 6 hours??:arrowhead:

What is that like a forward speed of 50 miles an hour?

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still closed near La TX border in 24, witha surface low south of La. Light snow across Tenn Valley, N Ga and western Carolinas At 30, no real low, but broad. It doesn't look like a perfect phase but its hard to tell the details of the shortwave diving in. Its sort of broad. the southern wve looks gone or sheared by now.

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the closing off 5H is too postitively tilted in the Ohio Valley to really help spark a big developing low in the Southeast, but the QPF is still pretty good in GA and most of SC by 36 hours. Its almost teh same look as GFS not quite. The important detail is the backside of the trough, and who knows which model is going to get that right, it makes all the differnce in teh world.

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Southern Stream s/w is actually farther east than the 12z GFS position -- GFS had it on Texas/La. border, Euro is in central La. -- I thought faster was good?!?!?

Sometimes faster is good but if the southern stream is too fast, then the northern stream may not capture at all.

I know this sounds weird but I really like the general trend of the 12z model suite. None are predicting a bomb compared to the Euro of a couple days ago. But like foothills stated earlier, this may turn into a nice little Christmas event for somebody and at least some snow for a larger area. Maybe just maybe as Santa comes rolling in tonight he'll bring us all a special present in the form of another westward trend in the model suite.

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According to the Euro the winners this run might be ATL-CLT-RDU a I-85 special.

Yep, the angle of the cutoff at 5H is pos. tilt from GA to NY so tht means the low develops too far off shore, but by then the intial moisture belt pivoted through Ga and up into western and central Carolinas, so we stay in duration snow . Hard to say about this run, i don't prefer using ECM for an event this dynamic at this 24 to 36 hour range, but it may be right at 5H. Any small error though , like everyone is saying, means a ton of difference.

QPF part of western and northern central SC are over .50" and from eastern Alabama northeast through GA and the Carolinas is .25" to 50" except nw and north central NC is less than .25". Also very east NC gets greater than .50"

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Yep, the angle of the cutoff at 5H is pos. tilt from GA to NY so tht means the low develops too far off shore, but by then the intial moisture belt pivoted through Ga and up into western and central Carolinas, so we stay in duration snow . Hard to say about this run, i don't prefer using ECM for an event this dynamic at this 24 to 36 hour range, but it may be right at 5H. Any small error though , like everyone is saying, means a ton of difference.

QPF part of western and northern central SC are over .50" and from eastern Alabama northeast through GA and the Carolinas is .25" to 50" except nw and north central NC is less than .25". Also very east NC gets greater than .50"

You would have to believe FFC will be putting out advisories/watches with the afternoon update...

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probably around .20 - .30.

Thanks dude! From FFC at 1:02...

UPDATE...

FORECAST LOOKS TO BE ON TRACK FOR TODAY...WITH TEMPERATURES

WARMING INTO THE UPPER 40S TO MID 50S THIS AFTERNOON ACROSS THE

CWA. MODELS SHOWING LITTLE DIFFERENCE BETWEEN THE 06Z AND 00Z

RUNS...AND WILL WAIT TO LOOK AT THE 12Z MODELS BEFORE MAKING ANY

ADJUSTMENTS TO THE CHRISTMAS DAY FORECAST AS FAR AS SNOW AND

ACCUMULATIONS. AS OF NOW...FORECAST THROUGH THE SHORT TERM LOOKS

TO BE ON TRACK.

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This run stays a bit too positively tilted for any big snow in the SE except in eastern NC and maybe NE SC. Still looks like a very good snow shower event over a lot of north GA Xmas night and AM Sunday. A ton of snow should fall at the higher peaks of the Apps.

The GFS also had that stationary axis of precip stretching for ATL right through and up 85 through southern NC to CLT, so this run also has that. It looks likely because when the first part of the northern energy gets here, and begins to stall and wait for backside energy to capture the gulf low, that area of snow should continue imo, steady for the 85 corridor. The only differnce for eastern sections this run is the low doesnt' devlop too good to get the eastern halve of Carolinas. But both models have good snow ATL to CLT region.

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The GFS also had that stationary axis of precip stretching for ATL right through and up 85 through southern NC to CLT, so this run also has that. It looks likely because when the first part of the northern energy gets here, and begins to stall and wait for backside energy to capture the gulf low, that area of snow should continue imo, steady for the 85 corridor. The only differnce for eastern sections this run is the low doesnt' devlop too good to get the eastern halve of Carolinas. But both models have good snow ATL to CLT region.

Will this really be all snow though? I have some doubt on that point.

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