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DISCUSSION ONLY: Friday night/Saturda rain/snow (2/15-16/2013)


famartin

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Thank you... what's your take?  Perhaps late in the game to catch on to recent trends in accordance with the others?  12 for 12 on the GEFS is pretty telling.  Something doesn't add up.  

My thoughts are wait till 0z and see how things stack up. Should get a better idea. The potential is there, as people have noted.

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HPC says the Euro is not the way to go...

 

 

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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Shouldn't we be relying on these pretty strongly right now?  I just saw you put "FWIW" as if you were referencing a 2nd tier source.

I wouldn't rely on them till after 12z tomorrow. Someone gave an excerpt from hpc or something that they need to go figure out why the srefs in the 12-24 hr period have been bad.

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