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March 2-4 Snowstorm Potential Part 2


REDMK6GLI

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I think this is gonna have a sharp feb 6 2010 cutoff some where between NYC and I195. Be interesting to see exactly where. Feb 6 2010, the raritian river was basically the bisection line from a foot to a few inches then nothing just a few miles north.

I think . 5 this times into nyc this time. In 2010 it only made it to bulls head in Staten Island. I think the cut off could b I 80 this time.

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I think . 5 this times into nyc this time. In 2010 it only made it to bulls head in Staten Island. I think the cut off could b I 80 this time.

I'm 10 miles or so from Long Beach and they had several inches and I had several flurries

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MODEL DIAGNOSTIC DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
1140 PM EST FRI FEB 28 2014

VALID MAR 01/0000 UTC THRU MAR 04/1200 UTC

...SEE NOUS42 KWNO (ADMNFD) FOR THE STATUS OF THE UPPER AIR
INGEST...


00Z MODEL EVALUATION...INCLUDING THE NAM AND GFS

...STRONG SYSTEM IN THE SOUTHWEST TONIGHT...RAPIDLY SHEARING
TOWARD THE EAST COAST SUN/MON...
...SURFACE LOW DEVELOPING ALONG THE ARCTIC FRONT OVER THE TN/OH
VALLEYS/MID-ATLANTIC...

PREFERENCE: BLEND OF THE 00Z GFS/12Z ECMWF
CONFIDENCE: SLIGHTLY BELOW AVERAGE

THE 00Z NAM IS A BIT STRONGER THAN THE GLOBAL MODEL CONSENSUS WITH
THE STRONG DEEP LYR LOW CENTER OFFSHORE CA THAT WILL BE MOVING
INLAND ACROSS CNTRL/SRN CA OVERNIGHT AND THROUGH SAT. THE ENERGY
AGAIN IS EXPECTED TO QUICKLY MOVE INTO THE FOUR CORNERS REGION BY
SUN WHILE SHEARING OUT...AND THE ENERGY WILL SHEAR DOWNSTREAM INTO
THE LWR MS/TN VLYS BY MON WHILE INTERACTING WITH THE SRN PORTION
OF AN ARCTIC FRONTAL ZONE THAT WILL BE DRAPED FROM THE LWR MS VLY
NEWD INTO THE MID-ATLANTIC REGION. ASIDE FROM THE NAM BEING A
LITTLE STRONGER WITH THE INITIAL SURGE OF HEIGHT FALLS INTO
CA...THERE IS NOT SPREAD ALOFT DOWNSTREAM AT LEAST UNTIL THE
SHEARING ENERGY REACHES THE LWR MS/TN VLYS AND MID-ATLANTIC LATE
SUN THROUGH MON....WHEN THE NAM BEGINS BECOMES A BIT MORE
PROGRESSIVE WITH THE ENERGY ENTERING A DEVELOPING MID/UPR LVL
CONFLUENCE ZONE OVER THE MID-ATLANTIC AND NEW ENGLAND. THE 12Z
UKMET IS A TAD SLOWER THAN THE GLOBAL MODEL CONSENSUS...WITH THE
00Z GFS/12Z ECMWF AND 12Z GEM GLOBAL SPLITTING THE DIFF.

AT THE SFC...THE MODELS ARE SUGGESTING THAT THE SHEARING ENERGY
WILL FOSTER AT LEAST TWO SFC WAVES OF LOW PRESSURE ALONG AN ARCTIC
FRONTAL ZONE...WITH ONE ON SUN DEVELOPING MOST LIKELY IN THE LEE
OF THE APPALACHIANS OVER THE CNTRL MID-ATLANTIC BEFORE EXITING
NEWD OFFSHORE NEW ENGLAND BY EARLY MON. THE 00Z NAM AND 12Z GEM
GLOBAL ARE MOST DEVELOPED/STRONGEST WITH THE FIRST WAVE...WITH THE
12Z UKMET/12Z ECMWF AND 00Z GFS ALL MORE SUPPRESSED/FLATTER. ALL
OF THE MODELS SUGGEST THE ARCTIC FRONTAL ZONE SETTLING FARTHER
SOUTH ACROSS THE MID-ATLANTIC AND TN VLY WITH THE INITIAL
WAVE...SETTING THE STAGE FOR A SECOND WAVE AS THE CORE OF WHAT IS
LEFT OF THE UPSTREAM SHORTWAVE ENERGY AIMS FOR THE EAST COAST. THE
00Z NAM/00Z GFS/12Z GEM GLOBAL AND 12Z ECMWF ARE MORE SUPPRESSED
WITH THE SECOND WAVE THAT EJECTS OUT OF THE TN VLY SUN
NIGHT...WITH THE 12Z UKMET FARTHEST NORTH. ALL OF THE MODELS TAKE
THIS SECOND WAVE MORE BODILY EASTWARD ACROSS THE SRN MID-ATLANTIC
MON WITH THE FRONTAL ZONE CONTINUING FARTHER SOUTH AS HIGH
PRESSURE NOSES ACROSS THE NORTHEAST. THE LATEST GEFS MEAN/ECENS
MEAN SOLNS STRONGLY SUPPORT THE DETERMINISTIC GFS/ECMWF CLUSTER
WITH THE UPSTREAM SHEARING ENERGY AND SUBSEQUENT DOWNSTREAM WAVE
ACTIVITY/FRONTAL ZONE PLACEMENTS. WILL PREFER A GFS/ECMWF BLEND
ATTM...WITH CONFIDENCE STILL A BIT LIMITED CONSIDERING THE OVERALL
MODEL SPREAD.   

 

:rolleyes:

 

http://www.wpc.ncep.noaa.gov/discussions/hpcdiscussions.php?disc=pmdhmd

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This ..the Korean and the ggem on the French site with the upside down maps always gave me a headache.

Anyway seeing the gefs north of the OP probably means the gfs is coming north the next run.

 

The GFS may very well be correct after 60 hours, what I'm not sure of though is if it is underdoing things from 48-60 on the overrunning snows..,.its tended to be very bad on any sort of overrunning induced precip all winter in many storm systems from the Southeast up into the Northeast...it completely blew overrunning in similar setups beyond 24 hours on 3 or 4 occasions I can recall...the ATL snowstorm being one of them.

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The GFS may very well be correct after 60 hours, what I'm not sure of though is if it is underdoing things from 48-60 on the overrunning snows..,.its tended to be very bad on any sort of overrunning induced precip all winter in many storm systems from the Southeast up into the Northeast...it completely blew overrunning in similar setups beyond 24 hours on 3 or 4 occasions I can recall...the ATL snowstorm being one of them.

 

The EURO at 12z showed a pretty good first batch of overrunning for us, GFS may very well be underdoing that part

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Lol the JMA is seriously juiced up. 1"+ plus nyc and 1.25+ south of nyc

Remember just yesterday at this time almost all major models were showing just that and some slightly more so there was no lol then. those in PHL- BWI are loling now but its who laughs last who laughs best. no rational reason other than Ukie and few of the lesser dependable models to hang hat on but I believe the swing bk begins with the Euro. Hold on to your hat!

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Remember just yesterday at this time almost all major models were showing just that and some slightly more so there was no lol then. those in PHL- BWI are loling now but its who laughs last who laughs best. no rational reason other than Ukie and few of the lesser dependable models to hang hat on but I believe the swing bk begins with the Euro. Hold on to your hat!

I lol at the JMA bc it's nothing like anything else...i also didn't say it was wrong. I just thought it was entertaining to see

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I think people are overreacting a bit at the moment.  Still time for this to trend and I don't think it can go any farther south than modeled at this point.  What we know is that this will be a cold storm for virtually everyone in this forums, and that we are only a 50 mile north bump as currently modeled to us again seeing 6-10".  Also I think the nature that it being early March people are less convinced of ratios.  If the 850's are as cold as currently modeled it doesn't matter what month it is we see good snow.  I'm expecting more fluff than paste tbh as we look quite cold.

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