Jump to content
  • Member Statistics

    17,586
    Total Members
    7,904
    Most Online
    LopezElliana
    Newest Member
    LopezElliana
    Joined

East Coast winter storm, February 13th-14th, imminent (Part II)


Typhoon Tip

Recommended Posts

Seriously now, high societal impact and getting higher up here as more and more of the population comes under the gun. Look for tomorrow's 12z runs to finalize, might want to check your out of power supplies. Just to be safe.

 

For real?  I have small 2kw genny that can run the frig but thats about it.......family of four in one bed FTW?  Oh F that.....:axe:  For some reason I can't wrap my head around this one being high impact.........too much uncertainty ATM

Link to comment
Share on other sites

  • Replies 1.6k
  • Created
  • Last Reply

Can someone comment on whether the UK / RGEM have any synoptic resemblance to 0z GFS vs. NAM... 

 

GFS vs. NAM are worlds apart synoptically... GFS nails us with late-blooming CCB, NAM nails us with front-end thump of a mature storm.

 

Poring over H5, the sagging of the shortwave further south and closing earlier (as Coastal mentioned) might explain the abrupt development east of SNE and CCB late on the GFS. But NAM for multiple runs shows nothing like that. Ironically, NAM never closes off at H5.

 

Loving this drama with big consequences T-minus 48...

Link to comment
Share on other sites

Can someone comment on whether the UK / RGEM have any synoptic resemblance to 0z GFS vs. NAM... 

 

GFS vs. NAM are worlds apart synoptically... GFS nails us with late-blooming CCB, NAM nails us with front-end thump of a mature storm.

 

Poring over H5, the sagging of the shortwave further south and closing earlier (as Coastal mentioned) might explain the abrupt development east of SNE and CCB late on the GFS. But NAM for multiple runs shows nothing like that. Ironically, NAM never closes off at H5.

 

Loving this drama with big consequences T-minus 48...

 

 

NAM did get us with a CCB finish...it wasn't as ridiculous as the GFS of course, but its there.

 

f57.gif

 

 

 

Ukie is still pretty far west but not as much as earlier. GGEM def went east and it sort of a compromise between the NAM and GFS for the finale.

Link to comment
Share on other sites

Ukie has a stronger front ender which makes sense to me. Not sure if it is a convection thing on the GFS or not, but seems suspiciously dry. Canadian also has a front end thump, but does not get much precip to western SNE, Ukie and Canadian both have a backlash signal with Ukie more western SNE, Canadian more central and eastern SNE.

Link to comment
Share on other sites

Why are they too soft on snow totals?

They may not be. This probably still has some tricks to pull.

John Q public relies on the Government. Being the go-to outlet informing and protecting the masses. They have to start conservative and ramp up if necessary. I tend to weenie out and have fun, but come crunch time the amateur wanna be comes forth

Link to comment
Share on other sites

Ukie has a stronger front ender which makes sense to me. Not sure if it is a convection thing on the GFS or not, but seems suspiciously dry. Canadian also has a front end thump, but does not get much precip to western SNE, Ukie and Canadian both have a backlash signal with Ukie more western SNE, Canadian more central and eastern SNE.

 

Definitely is!  At 36 hours it's got strobe lightning over the interface along the G-"string"  (QPF interpretation); it's almost like it loses that and goes, 'wait, I have about a billion microbars of lift to contend with', and we end up with it trying to correct with that big output 

Link to comment
Share on other sites

NAM did get us with a CCB finish...it wasn't as ridiculous as the GFS of course, but its there.

 

Ukie is still pretty far west but not as much as earlier. GGEM def went east and it sort of a compromise between the NAM and GFS for the finale.

 

All in all great trends tonight. Most of us were dusting off the toaster this afternoon.

 

I don't get the QPF distribution on the GFS... seems a bit suspect to me. Comparing SLP track and H5, NAM actually looks a little flatter at H5, GFS a little more intense and negatively tilted. The mid-Atlantic folks were commenting on this too. 

Link to comment
Share on other sites

Long time lurker. First time poster. Should be a fun storm that comes down to now casting Here in Milton, MA 7 miles SW of Boston expecting a mixed bag, and hoping for the best. Hoping NNE can finally cash in. You guys are long due for a good one up there.

 

Not really, we're just greedy. 

 

We've really had a good 10 years here, save one epic bad winter.. but those happen.  This has been no 1980s. 

Link to comment
Share on other sites

Model diagnostic disco... they comment on exactly what we mentioned, that NAM never closes off at H5, GFS shortwave further south...

favoring 0z GFS over NAM, to add to the collective wtf:

 

00Z NAM/GFS EVALUATION AND PRELIMINARY PREFERENCES
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
NAM/GFS INITIALIZATION ERRORS DO NOT APPEAR TO SIGNIFICANTLY
AFFECT THEIR LARGE SCALE OUTPUT.


EASTERN U.S. CYCLONE AND WINTER STORM
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
PREFERENCE: BLEND OF THE 00Z GFS / 12Z ECMWF / 21Z SREF MEAN
CONFIDENCE: AVERAGE ON THE LARGE SCALE...BELOW AVERAGE FOR
PRECIPITATION TYPE

RELATIVELY SMALL DIFFERENCES STILL EXIST BETWEEN THE LATEST
AVAILABLE GUIDANCE ON THE SYNOPTIC SCALE...BUT THESE DIFFERENCES
TRANSLATE TO LARGE IMPACTS AT THE SURFACE WITH P-TYPE. ONE
CONSISTENT TREND HAS BEEN SLOWER FROM LAST NIGHTS MODEL RUNS...BUT
THERE HAS BEEN MORE OF A WOBBLE OCCURRING BETWEEN EAST/WEST
DISPLACEMENT WITH THE UPPER TROUGH / CORRESPONDING SURFACE LOW
WITH EACH MODEL RUN. THE 00Z NAM IS STILL ON THE WEAKER SIDE OF
THE GUIDANCE WITH THE AMPLIFYING UPPER TROUGH INTO THE SOUTHEAST
EARLY THU AND NEVER REALLY CLOSES OFF A CENTER AT 500 MB...WHICH
IS A SIGNIFICANT DEPARTURE FROM THE REMAINING MODELS.
THE NAM
THEREFORE HAS A DIFFERING 850 MB LOW ORIENTATION AND IS
FASTER/WEAKER AT THE SURFACE. THE 00Z GFS POSITION LOOKS
FINE...JUST A BIT EAST OF THE 12Z ECMWF BUT IS WEAKER AT 850-500
MB BY ABOUT 30 M.


THE LATEST ENSEMBLE SCATTER LOW PLOTS...INITIALIZED 12Z/11...SHOW
3 CLUSTERS AT 00Z/14. THE ECMWF CLUSTER IS OVER THE DELMARVA WITH
THE 12Z ECMWF ON THE EAST SIDE OF THE ECMWF MEMBERS...FOLLOWED BY
THE GEFS MEMBERS ENE OF THE ECMWF...AND THE CMC NORTHEAST OF THE
GEFS. GIVEN THE TWO SHORTWAVES RESPONSIBLE FOR THE EAST COAST
STORM ARE CURRENTLY OVER THE U.S. AND APPEAR TO BE WELL
SAMPLED...THE REASONABLY CONSISTENT GFS/ECMWF/UKMET APPEAR TO BE
WOBBLING ABOUT A POINT LIKELY TO VERIFY...ALONG WITH THE SREF
MEAN...WILL PREFER A BLEND OF THE 00Z GFS / 12Z ECMWF / 21Z SREF.

Link to comment
Share on other sites

Euro def colder and a bit east of 12z at 48h...it is stronger again too. Stronger and east. IT doesn't pinch off 500mb as much down in the mid-atlantic.

 

 

The silence is deafening. It's always been this way, lurking, surfing. Recovering from the overdose of an eastern shift. Get bored go check the city that never sleeps. EURO model runs should be in a thread unto itself. Many NY posters have access to the early frames.   

And of course Will.

 

Good start. Locked and loaded.

Link to comment
Share on other sites

Archived

This topic is now archived and is closed to further replies.

Guest
This topic is now closed to further replies.
  • Recently Browsing   0 members

    • No registered users viewing this page.

×
×
  • Create New...