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1/17/16 Winter Weather Threat


packfan98

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Looks like 38/50 Euro members have some kind of low.  Some north and south.. The mean still has your flurry or two for a big chunk of NC and far northern GA.

 

The ensemble mean takes the center across central florida it looks.. before getting picked up out to sea in the northern stream? 

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Sorry I was in a college class and couldn't expound upon rgem.

This is the 12gfs big hitter from yesterday... Compare it to what the rgem just showed...

post-8878-0-74951700-1452801977_thumb.pn

post-8878-0-95176000-1452801994_thumb.pn

Even though the main models like gfs and euro are not looking great our shorter range models are picking up on some intricacies of the vort that the main models may be missing. Watch this closely as normal short range models pick up on this stuff before the big models.

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From GSP

BY EARLY SUNDAY...THE NEXT SOUTHERN SHORT WAVE TROUGH IS EXPECTED TO

SUPPORT CYCLOGENESIS ACROSS THE EASTERN GULF OF MEXICO. SHORT TERM

MODELS STILL ADVERTISE A DEFORMATION ZONE DEVELOPING OVER THE

CAROLINAS LATE SAT NIGHT/EARLY SUNDAY. HOWEVER...THE PRECIP RESPONSE

REMAINS VERY MUTED. THE GOOD NEWS IS GUIDANCE APPEARS TO BE

CONVERGING TOWARD A CLEAR QPF CONSENSUS...AS THE PREVIOUSLY

PRECIP-FREE ECMWF AND CANADIAN MODELS NOW PAINT A STRIPE OF VERY...

VERY LIGHT PRECIP (A FEW HUNDREDTHS AT MOST) ACROSS MUCH OF THE

FORECAST AREA. THIS IS MORE OR LESS IN LINE WITH THE PREVIOUSLY

WETTER GFS. MODEL CROSS-SECTIONS (ESP THE NAM) ARE ACTUALLY QUITE

INTERESTING FOR THIS EVENT...WITH NEAR-SATURATED AIR EXTENDING WELL

INTO THE DENDRITIC ICE CRYSTAL-GROWTH REGION...AND SOME (ALBEIT

WEAK) UVV WITHIN THIS REGION. WHILE LOW STABILITY IN THIS LAYER

COULD POSSIBLY SUPPORT SOME VERY LOCALIZED/MESOSCALE BANDING...

STILL SEE NO REASON WHY QPF WON/T BE VERY LIGHT IN MOST AREAS.

WILL CONTINUE TO ADVERTISE SLIGHT/LOW CHANCE POPS THROUGH THIS

PERIOD. IN TERMS OF P-TYPE...MODELS ARE ALSO COMING INTO BETTER

AGREEMENT ON THE SOUTHWARD PENETRATION OF COLD AIR. BASED UPON THIS

CONSENSUS...THE MOST LIKELY P-TYPE DISTRIBUTION WOULD BE MOSTLY

RAIN ACROSS THE SOUTHEAST TIER OF ZONES...A LIGHT RAIN/LIGHT SNOW

MIX ALONG AND NEAR THE I-85 CORRIDOR...AND MOSTLY LIGHT SNOW ALONG

THE I-40 CORRIDOR IN THE PIEDMONT AND ACROSS THE MTNS. BUT TO

REITERATE (AND THIS CAN/T BE STRESSED ENOUGH)...THE CHANCE OF EVEN A

DUSTING OF SNOW IN THESE AREAS IS 20-30 PERCENT AT BEST.

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So you're saying there's a chance. :lol:

 

Yes.  Apparently a less than 1 out of 20 chance for my backyard.  And yet, I continue to remain captivated by that small probability, which is still much greater than the probability of winning the grand prize in last night's Powerball drawing that had so much of the rest of the country captivated.  I saved my money that I could have spent on the Powerball to bet on this event instead.  :)

 

^^^^ It seems members of your team at GSP don't rule out the possibility of flakes up here in my area either.  Nice!

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birmingham afd, phased solution still not off the table.

 

"THERE ARE IMPORTANT CHANGES  

WITH THE DEPICTION OF A 500 MB TROUGH APPROACHING FROM TEXAS AS  
WELL. MODELS ARE NOW PICKING UP ON TWO SEPARATE SHORTWAVES...ONE  
IN THE NORTHERN STREAM...AND THE OTHER IN THE SOUTHERN STREAM AS  
THE SYSTEM DEVELOPS OVER TEXAS. THE TIMING AND PROGRESSION OF  
THESE WAVES WILL BE CRUCIAL TO THE STRENGTH AND TRACK OF THE GULF  
LOW...AND THERE APPEARS TO BE A WINDOW OF OPPORTUNITY FOR THE  
MODELS TO TREND TOWARD A PHASED SOLUTION...REFLECTED BY SEVERAL  
ECMWF ENSEMBLE MEMBERS HAVING SUB-1000 MB LOW PRESSURE IN THE  
NORTHERN GULF.
 THIS THROWS A BIT OF A WRENCH IN THE FORECAST AND  
BEARS CLOSE WATCHING DUE TO THE POTENTIAL FOR PRECIPITATION TO  
DEVELOP FARTHER INLAND."

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birmingham afd, phased solution still not off the table.

 

"THERE ARE IMPORTANT CHANGES  

WITH THE DEPICTION OF A 500 MB TROUGH APPROACHING FROM TEXAS AS  

WELL. MODELS ARE NOW PICKING UP ON TWO SEPARATE SHORTWAVES...ONE  

IN THE NORTHERN STREAM...AND THE OTHER IN THE SOUTHERN STREAM AS  

THE SYSTEM DEVELOPS OVER TEXAS. THE TIMING AND PROGRESSION OF  

THESE WAVES WILL BE CRUCIAL TO THE STRENGTH AND TRACK OF THE GULF  

LOW...AND THERE APPEARS TO BE A WINDOW OF OPPORTUNITY FOR THE  

MODELS TO TREND TOWARD A PHASED SOLUTION...REFLECTED BY SEVERAL  

ECMWF ENSEMBLE MEMBERS HAVING SUB-1000 MB LOW PRESSURE IN THE  

NORTHERN GULF. THIS THROWS A BIT OF A WRENCH IN THE FORECAST AND  

BEARS CLOSE WATCHING DUE TO THE POTENTIAL FOR PRECIPITATION TO  

DEVELOP FARTHER INLAND."

 

Matt wrote that and was talking about it earlier.  First time I've really seen him half-way enthused with the system.  He tends to be conservative with Winter WX.

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RAH is taking their sweet time getting out the AFD

THE PAST THREE RUNS OF THE GFS HAVE COME INTO LINE WITH THE

PREVIOUSLY-PREFERRED "SUPPRESSED" MODEL CONSENSUS WITH RESPECT TO

THE LOW TRACK THROUGH THE GULF OF MEXICO AND WELL OFFSHORE THE

SOUTHEAST US COAST SATURDAY NIGHT-SUNDAY...AND CONSEQUENTLY QUELLED

ALL OF THE (UNNECESSARY) HYPE FROM PERFECT PROGGING OF GFS SOLUTIONS

FOR THE ALLEGED SNOWSTORM -OR LACK THEREOF- FOR CENTRAL NC.

VERY LIGHT PRECIPITATION MAY INDEED OCCUR IN CENTRAL NC FOR A BRIEF

PERIOD LATE SATURDAY NIGHT INTO EARLY SUNDAY...BUT NOT AS A RESULT

OF THE FANTASY SNOWSTORM THE GFS ONCE GENERATED...AND INSTEAD IN

ASSOCIATION WITH THE APPROACH AND PASSAGE OF A NORTHERN STREAM

SHORTWAVE TROUGH NOW ALONG THE WESTERN BRITISH COLUMBIA COAST. THIS

SHORTWAVE WAS ONE OF THREE THAT THE GFS HAD PREVIOUSLY USED TO PHASE

A FULL-LATITUDE...NOR`EASTER-INDUCING TROUGH UP THE EAST COAST ON

SUNDAY.

 

...they sure arent feeling it lol.

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