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12/19-12/20 threat


CoastalWx

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Really doesn't mean much, but the usually flat and less impressed (and nearly defunct) ETA is also a bit impressed with the shortwave entering the Baja than the Euro..and has a depiction more similar to the GFS in that regard. Which eventually leads to this.

http://www.meteo.psu...ENT_12z/f84.gif

Yeah the only reason they bother running it is for use in the multi-model SREF.

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I believe he was busy writing the HPC discussion...

12Z GFS REMAINS THE MOST AGGRESSIVE MODEL WITH ITS STRONGER

SHORTWAVE AMPLIFICATION AS IT APPROACHES THE EAST COAST SATURDAY.

ITS MID LEVEL CONFIGURATION BY DAYS 4-5 FITS THE 00Z ECMWF ENS

MEAN PATTERN. ITS EXACT TRACK IS CRITICAL TO PCPN CHANCES AND

AMOUNTS ALONG THE NORTHEAST COAST ESPECIALLY NEW ENGLAND. GOOD

AGREEMENT BY THE 12 GFS ENS MEAN AND 12Z CMC BUT CONTINUED FLAT

AND WELL AT SEA BY THE UKMET AND 12Z ECMWF. UNCERTAINTY CONTINUES

WITH TWO SEPERATE CAMPS. RAPID OFFSHORE DEEPENING SCENARIO BY THE

GFS RUNS SEEMS MORE LIKELY AS THE SHORTWAVE AND DEVELOPING SFC LOW

ENCOUNTER AN UNSTABLE MARINE ENVIRONMENT WITH INCREASED

BAROCLINICITY FROM THE CURRENT STRONG COLD ADVECTION FLOW OVER

RELATIVELY WARM OCEAN WATERS.

SOME COASTAL RAIN ALONG THE SOUTHEASTERN SEABOARD SATURDAY WITH

SOME POSSIBLE LIGHT SNOW ALONG THE NRN EDGE OF PCPN ACROSS ERN

VA/SRN MD/DELMARVA/ COASTAL NJ. DEEPENING LOW NEAR THE NORTHEAST

40/70 BENCHMARK AND CLOSED OFF MID LEVEL AND WELL DEVELOPED H850

LOW SETTING THE STAGE FOR POTENTIAL HVY SNOWFALL INTO ERN AND

COASTAL NEW ENGLAND LATE SUNDAY AND MONDAY. CONTINUED WELL BELOW

NORMAL TEMPS EAST OF THE MS VALLEY WITH AGAIN WINDY CONDITIONS AND

LAKE EFFECT SNOWS TUESDAY-ONWARD INTO THE WEEKEND. ANOTHER COLD

SURGE POTENTIAL DEEP EXTENDING AGAIN INTO FLORIDA LATE NEXT WEEK

AND WEEKEND.

That seems like absolute crap reasoning...

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But Rosenstein is one of the better ones no? I like Flood...trust him. Uccelinni still there? Wonder what he thinks

I have no idea about the HPC forecasters. However, I just don't understand the reasoning there. The main issue is with the southwest shortwave...it has nothing to do with marine baroclinicity. If the shortwave isn't there..it isn't there.

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HPC model diagnostics disco:

...WAVE NEARING THE CALIFORNIA COAST FRI...

PREFERENCE: GFS/UKMET/CANADIAN GLBL COMPROMISE

THERE IS STILL A DECENT AMOUNT OF SPREAD BY FRI... WITH THE NAMLEANING TO THE SLOW SIDE OF THE SPREAD AND THE 00Z/12Z ECMWF ONTHE FAST/SERN SIDE OF THE ENVELOPE. THE 12Z UKMET/CANADIANGLBL/REG GEM GENERALLY ADD SUPPORT FOR AN INTERMEDIATE SOLNBETWEEN THE NAM AND 00Z ECMWF EXTREMES. THE 12Z ECMWF IS A LITTLEFLATTER THAN OTHER SOLNS WITH MID LVL FLOW REACHING NRN CA AS OFF48 EARLY FRI... SO WOULD RECOMMEND THE MOST SIMILAR CLUSTERING OFGFS/UKMET/CANADIAN GLBL SOLNS.

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HPC model diagnostics disco:

...WAVE NEARING THE CALIFORNIA COAST FRI...

PREFERENCE: GFS/UKMET/CANADIAN GLBL COMPROMISE

THERE IS STILL A DECENT AMOUNT OF SPREAD BY FRI... WITH THE NAMLEANING TO THE SLOW SIDE OF THE SPREAD AND THE 00Z/12Z ECMWF ONTHE FAST/SERN SIDE OF THE ENVELOPE. THE 12Z UKMET/CANADIANGLBL/REG GEM GENERALLY ADD SUPPORT FOR AN INTERMEDIATE SOLNBETWEEN THE NAM AND 00Z ECMWF EXTREMES. THE 12Z ECMWF IS A LITTLEFLATTER THAN OTHER SOLNS WITH MID LVL FLOW REACHING NRN CA AS OFF48 EARLY FRI... SO WOULD RECOMMEND THE MOST SIMILAR CLUSTERING OFGFS/UKMET/CANADIAN GLBL SOLNS.

King Euro versus the world.

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Stating the obvious, but one way or the other the GFS or Euro has to move to the other camp and soon, otherwise it will be an epic fail in the 4-5 day lead.

and which one is more notorious for epic fails in the 4-5 day lead? I'll give you a hint. It rhymes with shmeeffess

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WIth all of todays runs considered everyone has to feel pretty good..at least better than 24 hrs ago that we will all see snow this weekend..whether it's a couple inches or more who knows..but we all see snow with model concensus

Yup 5 straight Euro runs with a miss. Feel great!

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Well other than Will who is laying in the bathtub with hairdryer plugged in but not turned on. most of us still agree the Euro bias potentially is at play here..so there's no reason to flip the switch on the hairdryer to on yet

Did you take a poll of bald men living on a mountain in CT?

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Well other than Will who is laying in the bathtub with hairdryer plugged in but not turned on. most of us still agree the Euro bias potentially is at play here..so there's no reason to flip the switch on the hairdryer to on yet

It's certainly possible the Euro's bias is somewhat the cause of this. Still... I'm not that excited about getting a blockbuster back here.

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