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February 4th-7th Winter Storm Potential


Thundersnow12
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50 minutes ago, Chicago Storm said:


Still not a single storm, as it occurs in 4 different waves.

Single storm idea, which iirc was only shown by one GEM run, is probably out of contention.


.

The last wave being almost a week out. It could end up as eventful as the one coming up Mon -Tue.

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Euro says, "Wtf is the GFS smoking?" Edit:  Actually, now that I look back at the GFS, it does spin up a big storm.  It's just well east of the Euro.

floop-ecmwf_full-2020020200.prateptype_cat_ecmwf.us_mw.gif.501832e1682e4e2c9f2d65e8ec93337c.gif

 

Definitely an interesting evolution on that run of the Euro. Main trough hanging back is to our benefit here as it goes negative tilt and closes off but much colder aloft by then. So well developed deformation axis snows happen Thursday afternoon and night into Friday displaced well west of what becomes main surface low.

 

An initial strong surface low with good track Wednesday night into southern IN has less cold sector precip than you'd think just by looking at MSLP prog, because of trough hanging back, so you're just in broad southwest mid and upper flow at that point. The secondary low then tracks over TN valley gets captured by the closing off ULL and bombs to low 970s over Lake Huron late Thursday night.

 

Hopefully this general idea has some support from the 00z Euro ensemble. Still so far out but the good news is that the better performing models (Euro and UKMET) have a good event with this set-up in the 00z cycle. It's such a complex pattern to nail with once again tons of convection likely in the warm sector like Jan 10-11 so it's gonna take time to sort this all out.

 

 

 

 

 

 

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23 minutes ago, A-L-E-K said:

Riding the euro to bustville over here

your golden. A week of continuous clouds with multiple rounds of rain/snow and some diurnal help will get you to your 3.1 call by Friday afternoon, Big game today....and not in Miami....

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Expect Euro to cave to other guidance. Metro Chicago going 0 for 4 on waves with exceptions of areas far SE may see some accums. UKMET if verifies will tighten up that band of accums knocking out margins. Will see if the OV pink maps end up verifying to the same degree as our systems this winter.

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1 minute ago, hawkeye_wx said:

Yep, total cave job.  This Euro run sped up the northern part of the energy and shifted the southern piece a good bit back to the sw.

I know that it is a complex situation with multiple waves but the Euro SUXS just as much as the other models there is 0 run to run consistency.

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1 hour ago, Cary67 said:

Expect Euro to cave to other guidance. Metro Chicago going 0 for 4 on waves with exceptions of areas far SE may see some accums. UKMET if verifies will tighten up that band of accums knocking out margins. Will see if the OV pink maps end up verifying to the same degree as our systems this winter.

Was my concern all day...now confirmed. :yikes: 2-4 incher, and onto SPRING! 

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