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Feb 17/18 Storm Threat - Discussion


mahk_webstah

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especially if it has the same run 2x in a row...NAM will probably show a 20 inch bomb for us at 18z....

Yup, as we just saw, when the EURO gets locked into something, it's usually right. One good thing was with last night, only thing that had snow here was NECP models, while here we have literally everything against the EURO, although I'm still taking the EURO.

-skisheep

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Yup, as we just saw, when the EURO gets locked into something, it's usually right. One good thing was with last night, only thing that had snow here was NECP models, while here we have literally everything against the EURO, although I'm still taking the EURO.

-skisheep

I would not call 2 solutions in a row "locked in".

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How could you not buy the Euro after the last few events? 

 

Euro = Albert Einstein of weather models.  I still love that comparison, lol. 

 

It did not do as well as people think on last night's event, it was way too far SE it ultimately backed its way into the right solution for the wrong reason because there seemed to be a bit of a dry nose over LI/NYC otherwise it would have busted severely on the QPF.

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While the euro certainly held serve looking at the precip panels, there were some noted trends towards a more bullish solution when comparing the 500 vort maps...it particularly relies on how the front/northern short wave is oriented/rotating around the Polar vortex lobe over the great lakes..

Yeah aloft it resembles the Ukie
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HPC

 

DEEP CYCLONE DEVELOPING IN THE NORTHEAST...PREFERENCE:  TOWARDS A 12Z CANADIAN/12Z UKMET/12Z GFS COMPROMISEWITH LOW CONFIDENCETHE MAIN BRANCH OF THE WESTERLIES ACROSS WESTERN NORTH AMERICA ISEXPECTED TO DROP IN LATITUDE WITH TIME, WHICH SHOULD ALLOW ADEVELOPING DEEP CYCLONE JUST NORTH OF THE GREAT LAKES TO LOSE SOMELATITUDE IN TANDEM, WITH ENERGY COMING AROUND THE EASTERN SIDE OFTHE UPSTREAM RIDGE ALLOWING THE SYSTEM TO DEEPEN WITH TIME.  THEGUIDANCE AGREES ON THESE IDEAS, BUT DETAIL ISSUES RIDDLE THEGUIDANCE.  THE 12Z ECMWF AND ITS 00Z ENSEMBLE MEAN ARE NOW THEWEAK OUTLIERS WITH THE VORTEX NEAR THE NORTHEAST/ATLANTIC CANADA,RATHER THAN SHIFTING THEIR UPPER LOW TO THE SOUTHERN STREAM ENERGYMOVING UP THE EAST COAST, WHICH ALLOWS FOR A WEAKER AND MORESTRUNG OUT CYCLONE FARTHER OUT TO SEA, WITH LESS PRECIPITATIONPOTENTIAL ACROSS THE MID-ATLANTIC STATES/NEW ENGLAND THAN THEOTHER GUIDANCE.  WITH TRENDS IN THE CANADIAN SWINGING TOWARDS ASTRONGER SOLUTION (AS ADVERTISED BY THE UKMET FOR OVER A DAY NOW),AND THE MODEL CONSENSUS CURRENTLY LYING WITH THE NON-ECMWF RELATEDGUIDANCE, THE 00Z GLOBAL ENSEMBLE GUIDANCE AND 00Z ECMWF ARE BEINGGIVEN MINIMAL WEIGHT.  THE PREFERENCE REMAINS A 12Z UKMET/12ZCANADIAN/12Z GFS COMPROMISE, WHICH IS PREFERRED WITH LOWCONFIDENCE CONSIDERING THE STREAM INTERACTION/PHASING INVOLVEDWITH THIS SYSTEM, WHICH TENDS TO BE A LOW CONFIDENCE FORECAST INITSELF, AND SINCE THEIR SOLUTION OCCASIONALLY BREACHES THE 00ZGLOBAL ENSEMBLE GUIDANCE ENVELOPE WITH THE SURFACE LOW TRACK (TOTHE WEST).  THIS SYSTEM HAS BEEN MARKED AS A CANDIDATE FORATLANTIC TARGETED OBSERVATIONS/SHORT RANGE WINTER WEATHERRECONNAISSANCE.  SEE OUR QPF AND WINTER WEATHERPRODUCTS/DISCUSSIONS FOR MORE DETAILS ON THE PRECIPITATIONPOTENTIAL OF THIS SYSTEM.

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