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The Interior/NW Suburbs Winter Thread


Guest Patrick

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ODEL DIAGNOSTIC DISCUSSION

NWS HYDROMETEOROLOGICAL PREDICTION CENTER COLLEGE PARK MD

1056 PM EST THU FEB 07 2013

VALID FEB 08/0000 UTC THRU FEB 11/1200 UTC

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

INGEST...

00Z NAM EVALUATION

THE 00Z NAM IS TOO WARM INVOF H85 ON THE ORDER OF 2 TO 3C ACROSS

THE INTERIOR OF THE MID-ATLANTIC FROM CENTRAL VA NEWD INTO E CNTRL

PA AS SUGGEST BY THE 00Z KIAD RAOB.

...DEEP CYCLONE ADVANCING THROUGH THE GREAT BASIN/FOUR

CORNERS...EJECTING OUT INTO THE CNTRL PLAINS/UPR MIDWEST...

PREFERENCE: 18Z GFS/00Z ECENS MEAN

CONFIDENCE: AVERAGE

ALL OF THE MDLS CONTINUE TO SHOW A WELL-DEFINED MID LVL CLSD LOW

CENTER AND ASSOCD TROF AXIS DIGGING SEWD ACROSS THE WEST COAST

WHICH WILL BE ADVANCING WELL INLAND ACROSS THE GREAT BASIN AND

INTO THE ROCKIES/FOUR CORNERS AREA THROUGH SAT. THIS ENERGY WILL

EJECT OUT INTO THE CNTRL PLAINS AND UPR MIDWEST ALONG WITH

DEVELOPING SFC LOW PRESSURE ON SUN INTO EARLY MON. THE GUIDANCE

OVERALL IS IN RATHER GOOD AGREEMENT...BUT THE 00Z NAM GRADUALLY

BECOMES A STRONG OUTLIER WITH THE HT FALLS SUN AND SUN NIGHT AS

THE ENERGY EJECTS OUT ACROSS THE CNTRL HIGH PLAINS AND TWD THE UPR

MIDWEST EARLY MON. THE NAM ALSO BECOMES SOMEWHAT OF A SLOW OUTLIER

BY EARLY MON AS WELL. THE 12Z UKMET IS THE MOST PROGRESSIVE WITH

THE HT FALLS. THE 12Z GEM GLOBAL...12Z ECMWF AND 18Z GFS ALL SPLIT

THE DIFF. THE 12Z ECENS MEAN AND 18Z GEFS MEAN COLLECTIVELY ARE A

BIT MORE SUPPORTIVE OF THE 18Z GFS VS THE 12Z ECMWF. BASED ON THIS

AND THE OVERALL MDL SPREAD...WILL FAVOR A 18Z GFS/00Z ECENS MEAN.

...NORTHERN STREAM TROF DIGGING INTO THE NORTHERN PLAINS BY SAT...

PREFERENCE: 12Z ECMWF

CONFIDENCE: AVERAGE

THE 12Z UKMET WAS A RELATIVELY SHARP AND SLOW OUTLIER WITH THIS

SHRTWV TROF DIGGING SEWD ACROSS ALBERTA/SASKATCHEWAN AND INTO THE

NRN PLAINS ON SAT. THE 00Z NAM...18Z GFS...12Z ECMWF AND 12AZ GEM

GLOBAL WERE ALL MORE PROGRESSIVE. OVERALL THE 12Z ECMWF IS SHOWING

VERY GOOD CONTINUITY WITH THIS SYS...AND SO WILL FAVOR THE 12Z

ECMWF ATTM.

...VORT ENERGY DIGGING SOUTH ACROSS THE CONTINENTAL DIVIDE SAT

NIGHT THROUGH SUN...

PREFERENCE: 12Z ECMWF

CONFIDENCE: AVERAGE

THE 18Z GFS AS WITH ITS PREV RUNS APPEARS TO BE A BIT MORE

AGGRESSIVE IN DROPPING VORT ENERGY SWD DOWN THE E SIDE OF THE DEEP

LYR RIDGE JUST OFF THE WEST COAST. THE 12Z UKMET THOUGH SUPPORTS

THE STRONGER 18Z GFS. MEANWHILE...THE 12Z GEM GLOBAL APPEARS TOO

WEAK WITH THE ENERGY...WITH THE 00Z NAM AND 12Z ECMWF SPLITTING

THE DIFF. THE 18Z GEFS MEMBERS GENERALLY DO NOT SUPPORT ANYTHING

AS ROBUST AS THE 18Z GFS...AND WITH THE 12Z ECENS MEAN SUPPORTING

THE 12Z ECMWF...WILL LEAN AWAY FROM THE GFS SOLN ATTM IN FAVOR OF

THE ECMWF.

...PHASING NORTHERN AND SOUTHERN STREAM ENERGY ALONG THE EASTERN

SEABOARD...

...POWERFUL COASTAL LOW EVOLVING OFF THE MID-ATLANTIC AND NEW

ENGLAND COASTS...

PREFERENCE: 12Z ECMWF

CONFIDENCE: AVERAGE

SRN STREAM ENERGY OVER THE LWR MS VLY AND A DEVELOPING AREA OF LOW

PRESSURE JUST INLAND THIS EVENING OFF THE SOUTHEAST COASTLINE WILL

LIFT NEWD ALONG THE MID-ATLANTIC COAST FRI. AMPLIFYING NRN STREAM

HT FALLS DIGGING ACROSS THE LWR GRT LAKES AND UPR OH VLY REGION

WILL CAPTURE AND PHASE WITH THE SRN STREAM ENERGY AND DRIVE A LOW

CENTER THAT WILL BOMB OUT OFF THE NRN MID-ATLANTIC AND SRN NEW

ENGLAND COASTS LATE FRI INTO EARLY SAT...WITH LOW PRESSURE

CROSSING NEAR THE BENCHMARK. LOW PRESSURE WILL THEN MOVE ENEWD OUT

TO SEA LATE SAT INTO SUN BEFORE THEN INVOF THE BENCHMARK FRI NIGHT

AND EARLY SAT...BEFORE THEN PUSHING EAST AND AWAY FROM NEW ENGLAND

ON SUN. REGARDING THE MDL DETAILS...THE 12Z ECMWF AND 00Z NAM

CONTINUE TO BE A LITTLE WEST OF THE OVERALL MDL CONSENSUS...WITH

THE 18Z GFS...12Z GEM GLOBAL AND THE 12Z UKMET A LITTLE FARTHER

EAST. THE 12Z ECENS MEAN ACTUALLY SUGGESTS A LOW TRACK JUST A TAD

LEFT OF THE 12Z ECMWF. THE 18Z GEFS MEAN SUPPORTS THE 18Z GFS.

BASED ON ALL THIS...HPC WILL FAVOR A SOLN STRONGLY TWD THE 12Z

ECMWF ATTM.

...MODEL TREND GRAPHICS AT www.hpc.ncep.noaa.gov/html/model2.shtml

...500 MB FORECASTS AT

...500 MB FORECASTS AT www.hpc.ncep.noaa.gov/h5pref/h5pref.shtml

ORRISON

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Guest Patrick

light snow here above Lake Wallkill...have a new inch on all surfaces as of 11:35.  So far, just enough to freshen up the snowpack.  I really want to go outside and pull the heavier bands westward lol.  Mt. Holly sticking with 10-14 up this way, but I could easily see that slipping just east of me.  Regardless, an awesome day out there with snow falling and a brisk wind.

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Moderate snow here in Monroe with temp at 30. Still just a coating but starting to whiten up some more.

Winds picking up. Latest forecast still showing 12-16 inches here. Just going to sit back and see what happens. Will gladly take a foot along with the winds- hopefully we get a good dumping either way.

Everyone enjoy and be safe!

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Woah what a difference a few minutes makes.  It's nuking out there right now!  Down to 1/8 mi vis with beautiful flakes mostly falling sideways but the wind seems to be lightening up and turning slightly more northerly rather than north/northeast.

 

Just about time to take the wifes Subie out and test the new snow tires I put on a few weeks ago.

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Good afternoon Folks,

 

Best snow of the day is falling.

Looks to be the biggest snow of the season imby.

Current temp 27F

New snow - 2.0 inches

 

Hopefully some of those bands blow NW later this afternoon/tonight.

I expect to finish around 10 inches unless something crazy goes down later with  a knarly band.

 

Cheers,

 

 

Matt

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Guest Patrick

Ditto... but you do have about 398 feet of elevation on me :)

 

Watching the radar...looks like the bomb has been detonated, and good to see precip filling in to our South and Southwest...bodes very well for later on. 

 

Good afternoon Folks,

 

Best snow of the day is falling.

Looks to be the biggest snow of the season imby.

Current temp 27F

New snow - 2.0 inches

 

Hopefully some of those bands blow NW later this afternoon/tonight.

I expect to finish around 10 inches unless something crazy goes down later with  a knarly band.

 

Cheers,

 

 

Matt

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Going to be a close call for those of us in NW NJ later tonight. May just miss the major banding but still see a solid 8-12". Or maybe we will be surprised with the heavy band a little further west and some of us get 10-18". Outside of that one fear is being close but outside the heavy band and thus sitting in light snow and subsidence for a prolonged period. That could leave some in the 6-8" range. For those reason as I have advertised to friends since early yesterday 8-16" for most of NNJ with some higher amounts possible if heavier band reaches into area for a prolonged period. From my understanding may face another coastal threat about this time next week.

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heaviest snow yet here....and radar is ugly. S+ with 1"per hour rate going on right now.

Nice steady light to moderate snow here all day despite radars less then stellar appearance. Maybe that is sign later will be pleasantly surprising. ;)

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