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March 13 - 15 Major Winter Storm Potential


NEG NAO

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Updating exact (in prorgess)

3/12 12Z Guidance Summary:

 

3/12 12Z Guidance Summary:

 

QPF / SNow range NYC area

 

SREF: 1.30 - 1.55 / 10 - 18"

NAM:  1.00 /  6 - 12"

PNAM: 1.70 - 1.95 /  15 - 22"

RGEM: 1.65 - 1.80 / 10 - 18" 

GFS: 0.85 - 1.15 / 8 - 12"

GEFS:
GGM:

UKMET:
JMA:

ECM:
EPS:


EPS:

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4 minutes ago, SnoSki14 said:

Slower and clearly further west but still not perfect. However it looks much improved over the 6z run. 

With an inferior model all you can hope for are baby steps. Sorry but there is little viable comparison to the Euro. They dont call it the king for nothin! To be clear I say this not because of QPF because structure doesnt translate at all and this constant convective feedback issue can get awfully annoying!

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1 minute ago, brooklynwx99 said:

The GFS should have more precip in the area, but issues with convection jump QPF east. H5 was better on this run though, so don't bother with QPF regarding the GFS. The LP was farther west, but QPF was pulled east due to convective interference.

gfs_z500_vort_us_fh42_trend.thumb.gif.f0e13098649cec01d7667d76a63641b3.gif

Your insight is always very good. Post more if you can

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I don't think the GFS was a big move west or east for that matter. Sometimes comparing the two frames (from 6z/12z) does not show a move west/east because the storm is moving slower/faster, making it seem as if the low has shifted in one direction, when really it is not comparing apples to apples. That being said, it did bring a bit more precip into most areas, making it similar to the 00z run, improved over the 06z run


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