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January 31-February 2 MAJOR Winter Storm


Powerball

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We were due for one of the models to show a solution not in line with what has been consistent so far.... that's not a big surprise. I am not going to say that the shift in the GEM is a harbinger of what is to come, but it does remind me of how quickly things can change. As the energy starts to come on shore, could the GEM be responding to that? The WV loop shows the leading edge of the low crossing the N CA, S OR coast over the last hour.

http://www.goes.noaa.gov/GSSLOOPS/alwv.html (it looks like it's the current loop)

Is it possible that the GEM at least, is responding to changes as things begin to sample better? I predict a couple of shfts in the storms track throughout the day today as the models adjust and then it's my guess that by tomorrow we will have an even better track depiction, which is bound to make some happy, and disappoint others.

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You are set man, seriously...

we haven't seen any models runs go way absurd..the nam might be ice to snow...but it has trended colder and further SE, exp the backside.

oh and there is this:

I'd love for you to be right, but seriously Friv, this is screaming ice/mix storm for LAF IMO. Time will tell though...

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HPC...

...SEE NOUS42 KWNO ADMNFD FOR THE STATUS OF THE UPPER AIR

INGEST...

12Z NAM/GFS EVALUATION AND PRELIMINARY PREFERENCES

...UPPER TROUGH FORMING ACROSS THE INTERMOUNTAIN WEST/ROCKIES

THROUGH THE PERIOD...

PREFERENCE: UKMET

THE NAM AND GFS HAVE POTENTIALLY SIGNIFICANT INITIALIZATION ERRORS

OVER BRITISH COLUMBIA...

WITH THE NAM TOO WEAK AND NORTHEAST WITH THE CENTER OF THE

DEVELOPING SHORTWAVE TROUGH...

AND GFS TOO STRONG AND SOUTH OF ITS ACTUAL CENTER. THESE

DIFFERENCES CONTRIBUTE TO GROWING SOLUTION DIFFERENCES OVER

TIME...WITH THE GFS LESS AGGRESSIVE IN DIGGING THE TROUGH INTO THE

ROCKIES...A SOLUTION WHICH IS DISCOUNTED DUE TO INITIALIZATION

ERRORS AND ITS RELATIVE POSITION WITHIN THE GUIDANCE ENVELOPE.

MEANWHILE...THE NAM...ALTHOUGH WITH INITIALIZATION ISSUES OF ITS

OWN BUT NOT AS MUCH AS THE GFS...PRODUCES A FORECAST CLOSE TO THE

MODEL CONSENSUS INCLUDING ENSEMBLES...AND THUS IS CONSIDERED

REASONABLE. OTHERWISE...THE NEW UKMET HAS TRENDED TOWARD THE 00Z

ECMWF BUT IS NOT AS FAR WEST NOR AS DEEP WITH THE UPPER LOW BY 84

HRS...AND GIVEN ITS MORE RECENT AND MORE ACCEPTABLE

INITIALIZATION...HAS THE EARLY LEAD REGARDING PREFERENCES.

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It may be a bit early...but would it be useful to see how each of the 12z models initialized current conditions?

While that probably won't help with the exact final track, it may be useful to spot red flags when Model A has an eventual solution that is quite different from the relative consensus solutions of Models B, C, D, etc.

EDIT: looks like Chicago Storm beat me to it...

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