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January 3-4 Storm Thread part II


rduwx

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Well UK at 72 looks east of CMC and way east of NAM...but we care about what happens before that.  But based on the 48 hour map, the trough doesn't look as sharp as the 0z run.  And assuming since nobody posted any precip out put from the 0z UK it couldn't have been good and this run looks worse.

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  On 1/1/2018 at 4:06 PM, griteater said:

Models are trying to figure out what to do with the surface pressure field just off the coast (NW of the main low on the model), adjusting to lower pressures there each run. 

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yep its like clock work 850 vort is moving north this is why we shift the 0c 850 line NW at this range 

gem_z850_vort_us_fh54_trend.gif

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  On 1/1/2018 at 4:09 PM, packbacker said:

Well UK at 72 looks east of CMC and way east of NAM...but we care about what happens before that.  But based on the 48 hour map, the trough doesn't look as sharp as the 0z run.  And assuming since nobody posted any precip out put from the 0z UK it couldn't have been good and this run looks worse.

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the 0z uk didn't look bad at all precip wise. snow all the way back to augusta. 

P1_GZ_D5_PN_072_0000.gif

 

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  On 1/1/2018 at 4:41 PM, BIG FROSTY said:

070e2e87c125f1f33369a958dc12ad45.jpg


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My guess is he is talking about the PV low over the lakes...not the chaser.  The chaser definitely phases and definitely helps the southern piece go neutral/neg, hour 42.  At 66 you see the PV low drop down, that will not phase, if it did then yes, it would 93 redux.

Yep...makes sense what he says...in the NAM runs you see the PV low (NS) kick out the southern h5 low, which is why the heaver QPF never really makes it to central NC.

gem_z500_vort_us_8.png

 

gem_z500_vort_us_12.png

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  On 1/1/2018 at 4:50 PM, packbacker said:

My guess is he is talking about the PV low over the lakes...not the chaser.  The chaser definitely phases and definitely helps the southern piece go neutral/neg, hour 42.  At 66 you see the PV low drop down, that will not phase, if it did then yes, it would 93 redux.

 

 

 

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If that phased, we'd get rain. So I'm fine without a triple-phaser.

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