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SE snow threat 1-15/16?


Cheeznado

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I think he was saying the trend for the NAM "and" the GFS is getting better meaning both models took steps towards a better setup.....or at least that's how I read what he meant.

 

Oh I don't care what he was saying, I just want him to actually put some meat behind it and explain. He is such a weenie. 

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Someone said in the main weather discussion forum that we have had a - NAO for 9 consecutive days apparently.

 

Oh.  Okay.

 

Well, I must admit the 21z SREF members don't look half bad at h500.  The mean ptype etc even has light snow as far south and east across GA through the end of the run.  A few members look really good though for the energy track.

 

One is wanting to go from neutral to negative all the way back into LA.

 

Now if only we can get a good evolution and agreement to get more people some Winter weather from this.

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Oh. Okay.

Well, I must admit the 21z SREF members don't look half bad at h500. The mean ptype etc even has light snow as far south and east across GA through the end of the run. A few members look really good though for the energy track.

One is wanting to go from neutral to negative all the way back into LA.

Now if only we can get a good evolution and agreement to get more people some Winter weather from this.

I guess it really doesn't matter that it has been negative for 9 days because it has been extremely weakly negative. Basically neutral. We need a - NAO <-1SD.
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O6z GFS is another step toward something good. At 500 the trough digs a little deeper, more blocking, and it is taking on a more negative tilt than the 0z run. Also looks slightly better in terms of precip. These are good trends folks. It is not far from a nice little event.

 

Yep still not there yet, all those pieces kind of phase at the wrong times...but like you said it def. still needs to be watched. If that qpf can go up just a little bit someone will get a nice surprise. 

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Flizzard in the RAH area Wednesday?

 

This morning's AFD...

 

A TRAILING SHORTWAVE TROUGH HAS TRENDED MUCH STRONGER AND FARTHER
SOUTH IN NWP GUIDANCE SOLUTIONS DURING THE PAST 24 HOURS...WITH AN
AREA OF CONCENTRATED MID LEVEL HEIGHT FALLS ON THE ORDER OF 150
METERS NOW FORECAST TO PASS ACROSS GA AND SC - A FAVORABLE TRACK FOR
LIGHT PRECIPITATION OVER CENTRAL NC...WITH OTHERWISE MOISTURE-
STARVED SHORTWAVES IN NW FLOW ALOFT. SO AFTER A DRY AFTERNOON...WE
WILL INTRODUCE A SHORT PERIOD OF A CHANCE OF LIGHT RAIN AND SNOW
OVER THE SANDHILLS AND COASTAL PLAIN
...WHERE LIFT AND MOISTURE ARE
MAXIMIZED WITH THE STRONGEST HEIGHT FALLS PASSING WELL TO OUR SOUTH.
THIS POTENTIAL BEARS WATCHING...BUT ANY PRECIPITATION SHOULD BE VERY
LIGHT...AND NO SIGNIFICANT IMPACTS ARE EXPECTED.

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Here is part of GSP's overnight:

 

AT THIS POINT IN THE FORECAST...GUIDANCE
SOLUTIONS SEEM TO DIVERGE SLIGHTLY WITH RESPECT TO FEATURE PLACEMENT
OF THE NEXT APPROACHING SYSTEM TUESDAY NIGHT. A FAST MOVING CLIPPER
SYSTEM WILL DIVE ACROSS THE UPPER MIDWEST AND INTO THE
TENNESSEE/OHIO VALLEYS OVERNIGHT TUESDAY INTO WEDNESDAY MORNING.
MOISTURE ASSOCIATED WITH THIS CLIPPER WILL PUSH INTO THE WESTERN NC
MOUNTAIN ZONES EARLY ON WEDNESDAY MORNING LEADING TO INCREASING
POPS. THERMAL PROFILES WILL ALREADY BE SUPPORTIVE OF SNOW
SHOWERS...HOWEVER LAPSE RATES WILL INCREASE THROUGH THE MORNING
THEREBY INDICATING THE POTENTIAL OF A FEW CONVECTIVE SNOW BANDS. AT
THIS TIME...EXPECTING MOST OF THE SIGNIFICANT ACCUMULATIONS TO
REMAIN ALONG THE HIGH TERRAIN. HOWEVER AS MENTIONED ABOVE...A FEW
GUIDANCE SOLUTIONS INDICATE SOME OF THESE SNOW SHOWERS AND PERHAPS
CONVECTIVE BANDS COULD ESCAPE THE MOUNTAINS AND ENTER INTO THE
FOOTHILLS/PIEDMONT OF WESTERN NC. FORECAST DOES NOT REFLECT THIS
WITH ANY ACCUMULATIONS OUTSIDE OF THE MOUNTAINS...WITH THAT SAID A
MENTION OF SNOW SHOWERS ACROSS THESE AREAS WILL REMAIN IN THE
FORECAST.
TEMPERATURES ON WEDNESDAY WILL BE ON THE ORDER OF 5-8
DEGREES BELOW NORMAL WITH TEMPERATURES FALLING RAPIDLY LATE IN THE
AFTERNOON AS THE SURFACE COLD FRONT ASSOCIATED WITH THE CLIPPER
PASSES THROUGH THE REGION.

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SREF plume's starting to show snow signals even in RDU for this time period.  From the last run GSO's mean hops, as does HKY and CLT.  For GSP a similar dance is also taking place, and it looks as though even more members in ATL are coming on board for at least a dusting.  Sw & parts of SE VA looks to be primed for snow also.  The SREF is catching onto something, lets see if the trend continues.

 

 

 

 

RDU SREF Plume's:

http://www.spc.noaa.gov/exper/sref/fplumes/index2.php?YMD=20140112&RT=09&PRM=Total-SNO&SID=RDU&INC=ALL&NNC=&max=&min=&mZOOM=8&mLAT=36.057706907536044&mLON=-79.89062499999999&mTYP=roadmap

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I really don't ever hear much talk about the SREF, nor do I look at it myself that much. Is it at all reliable compared to the GFS, NAM, ECMWF?

 

It is an ensemble forecast system that is used frequently within aviation.  It takes into account its 21 members and then provides a mean solution based off that data.  Seems to be pretty reliable even though I have only been watching it for a couple of months so maybe others can weigh in, but I like it because it shows how much uncertainty there is within the atmosphere and models.

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