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February storm threat discussion


Ellinwood

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Canadian more or less looks like the UK. Drops the energy into the desert southwest...the GFS is the outlier of the three being more progressive with the wave.

Canadian has a weak coastal from hour 144-156 that delivers pretty good qpf to the DC corridor.

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I somehow doubt the energy is gonna sit there for 4 days but it's not unrealistic

Not sure I get what you're saying. Shortwave comes into the PacNW 2/1 12Z or so, by 2/4 00Z digs into the desert southwest...meanwhile the GFS has moved the wave along and has a sfc low over southern NC and it's snowing in DC.

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pretty much...there is a very weak wave of low pressure moving to our west that tries to pop a very weak coastal that misses us...the whole thing is sloppy and uninspiring and might bring some very light snow/rain Saturday night, sunday

Gfs I'm sure will fold to the euro like it always does.

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Gfs I'm sure will fold to the euro like it always does.

You may be right, but the Euro has not settled into any consistent solution for next weekend. The GFS ensembles have been consistent showing a storm threat for next weekend. Now the spread on the ensembles is large, however almost all of the members have a storm somewhere along the eastern seaboard next weekend (some have stronger secondary re-development than others). Until the Euro settles down or the GFS punts on the storm idea, it will be interesting to follow.

MDstorm

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As far as the pattern down this way, I think it won't turn more favorable for anything..until maybe near the 10th or so. This is when the trough may retro enough to open the door to more widespread threats in the East. There may be enough of a ridge out west, and ridging poking into Greenland for a brief time, to allow this to happen...but this is not a certain thing at all. Of course you could always get clipped by Miller B's or maybe even overrunning, but I think the better chance comes maybe near the 10th. JMHO. Without a stout -NAO, I know it can be tough, so I don't think you can use stronger words..other than "chance" right now..but keep watching going forward.

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Gfs folded. The run is a disaster and winter is still over. There is not one cold day on the run

Not sure why you are living and dying but each run of the GFS op when it is flip flopping like a fish out of water. Not saying they are right but I think I would put more stock in the ensembles which look decent and have been far more consistant then the OP.

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Regardless of the individual storms, the models are actually progressing the cooler pattern into the 6-10 day, which is a good sign that will be a cold period in the eastern U.S. early-mid Feb. that will allow for snow chances.

The next step is trying to figure out where the longwave trough will set up within this cooler regime. (EDIT: or if there will even be one)

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Right now on the ensemble means at least thru day 10 it looks to be a little east of where we'd like plus the models still seem to be showing a negative ao as they have high heights back over the azores and low heights near and just south of iceland. That implies systems probably ould be moving really fast. Still the amplitude of the pattern suggest a period of colder than normal weather and that's a start.

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to break the back of a seasonal pattern that has held strong for over 2 months is going to be a biatch, especially with global SSTA continuing to support it

as much as I want it, I am skeptical of the models

and even if we do get a "change" to sustained cold for a time, will the pattern be conducive to snow as we won't have much time to cash in

so my advice is to avoid visiting the high floors of tall building for the next 45 days

here's hoping to a better next year :drunk:

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to break the back of a seasonal pattern that has held strong for over 2 months is going to be a biatch, especially with global SSTA continuing to support it

as much as I want it, I am skeptical of the models

and even if we do get a "change" to sustained cold for a time, will the pattern be conducive to snow as we won't have much time to cash in

so my advice is to avoid visiting the high floors of tall building for the next 45 days

here's hoping to a better next year :drunk:

CPD said in its note that although perhaps colder in mid-Feb, it would also be dryer pattern. FWIW.

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Bits and pieces from HPC.

THE 00Z ECMWF

IN PARTICULAR COMPARES UNFAVORABLY TO OTHER MODEL/ENSEMBLE

GUIDANCE WITH ITS SHRTWV TRACKING FROM THE SRN ROCKIES INTO THE OH

VLY DURING WED THU......

THE RAPID SHARPENING/AMPLIFICATION OF THE WRN

NOAM RIDGE SEEMS TO FAVOR AT LEAST AN INTERMEDIATE TROF AXIS

VERSUS THE ERN SIDE OF THE ENVELOPE.....

A DIFFICULT AND LOW TO NO

CONFIDENCE FORECAST IN DETAILS LATE PERIOD MAINLY WITH THE ERN

CONUS TROF.....

DEPICTION BY DAY 5 FRI

OF A CENTER JUMPING SFC LOW FROM THE OH VALLEY TO THE NC COAST AND

THAN AN EXIT NEWD TO NEAR THE NEW ENG BENCH MARK BY DAY 6 SAT

SEEMS REASONABLE AT THIS TIME ALBEIT WITH CONTINUED VERY LOW

CONFIDENCE.

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