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WidreMann told us it was gonna snow thread


LithiaWx

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how does it look for the coast?

Morehead City to Wilson, NC to Henderson, NC and right of that line is about 3"

 

Majority of NC gets about 1" Columbia, SC north and northeast of Columbia gets in on it too, about 1"

Hard to tell until I see real accumulation maps but this is a trend if I've ever seen one!

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One important thing about the GFS ensembles is that they are consistent and they are further west than the op is.  Thus, perhaps the op hasn't come far enough west yet and at the same time it gives the op some credibility.

 

The Euro will help me sleep well tonight.  I was cringing before I looked at it a few minutes ago, expecting disaster!  :weenie:

 

By the way, the 06z RAP at initialization has the trough/ridge setup further to the west than the 00z NAM had it at hr 6.  Good news, yes?

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One important thing about the GFS ensembles is that they are consistent and they are further west than the op is.  Thus, perhaps the op hasn't come far enough west yet and at the same time it gives the op some credibility.

 

The Euro will help me sleep well tonight.  I was cringing before I looked at it a few minutes ago, expecting disaster!  :weenie:

 

By the way, the 06z RAP at initialization has the trough/ridge setup further to the west than the 00z NAM had it at hr 6.  Good news, yes?

 

James, I barely want to think if people don't have warning and IF the RAP is going to verify.  It's the weekend..  But NO fear mongering from me.. I think the odds are low to pop a low in the gulf/neg tilt around Lousiana.

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Glad to see it trending colder with the trough all the way into the gulf.  Get that good cold energy mixing with the heat, and make it go boom.  At least mini boom :)  I've already gone from nothing to .01 with it cold enough for some good virga snow :)  Won't take much for a storm to show up down there, if the cold gets down there.  And now some more deep pushing cold is snowing up in funnyland.  Haven't seen two on a map in a long while.    T

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Very interesting. The weenie in me keeps thinking the "Carolina Crusher". From RAH:

 

.SHORT TERM /SATURDAY THROUGH SATURDAY NIGHT/...
AS OF 330 AM FRIDAY...

...POTENTIAL FOR WINTER WEATHER INCREASING ACROSS PORTIONS OF
CENTRAL NC SATURDAY EVENING/NIGHT...

VERY INTERESTING SETUP IN THE SHORT TERM PERIOD IN ASSOC/W A DYNAMIC
AND POTENTIALLY EXPLOSIVE PATTERN. IF UPSTREAM QPF OVER THE DEEP
SOUTH SATURDAY MORNING IS ACCURATE...THE POTENT UPPER LEVEL WAVE
DIGGING INTO THE SOUTHEAST CONUS AND ASSOCIATED COASTAL CYCLONE WILL
REMAIN PROGRESSIVE OVER THE SOUTHEAST/CAROLINAS...WITH LIGHT
PRECIPITATION AND ANY WINTER WEATHER POTENTIAL OF THE NUISANCE
VARIETY. HOWEVER...IF THE 00Z MODEL GUIDANCE IS UNDER-DONE
(ESPECIALLY WELL UNDER-DONE) WITH PRECIP AMOUNTS IN ADVANCE OF THE
AMPLIFYING UPPER LEVEL TROUGH UPSTREAM OVER THE DEEP SOUTH...WHICH
IS DEFINITELY POSSIBLE IN THIS TYPE OF SETUP...THE ASSOCIATED LATENT
HEAT RELEASE AND RESULTING DOWNSTREAM RIDGING COULD FURTHER AMPLIFY
THE UPPER LEVEL WAVE DIGGING INTO THE SOUTHEAST LATE SAT INTO SAT
NIGHT...RESULTING IN A SLOWER/STRONGER SURFACE CYCLONE THAT IS MUCH
CLOSER TO THE COAST...AND A POTENTIAL FOR SIGNIFICANT WINTER WEATHER
ACROSS PORTIONS OF THE CAROLINAS...ESPECIALLY EAST OF HIGHWAY 1.
WILL HAVE TO PAY VERY CLOSE ATTENTION TO UPSTREAM PRECIPITATION OVER
THE DEEP SOUTH SATURDAY MORNING...AND HOW WELL MODEL GUIDANCE IS
VERIFYING W/REGARD TO QPF. THE LATEST 00Z MODEL GUIDANCE HAS TRENDED
WETTER OVERALL SAT AFTERNOON INTO SAT NIGHT...WITH A GOOD 0.25" OF
LIQUID EQUIVALENT OVER CENTRAL NC (ALONG/EAST OF HWY 1) BETWEEN 18Z
SAT AFTERNOON AND 06-12Z SUN IN ASSOC/W STRONG UPPER LEVEL DYNAMICS.
FCST SOUNDINGS AND CRITICAL THICKNESSES SUGGEST PRECIP BEGINNING AS
RAIN SAT AFTERNOON...WITH A BOUNDARY LAYER (LOWEST 2-3 KFT)
INITIALLY JUST TOO WARM AND INSUFFICIENTLY DRY ENOUGH TO SUPPORT
FROZEN PTYPES. HOWEVER...AS THE ASSOCIATED SFC CYCLONE BEGINS TO
RAPIDLY DEEPEN OFFSHORE...THE ONSET OF STRONG LOW-LEVEL COLD
ADVECTION /NORTHERLY FLOW/ SATURDAY EVENING IS EXPECTED TO LEAD TO A
RAPID CHANGEOVER FROM RAIN-SNOW BY ~00Z. IF AND HOW MUCH SNOW
ACCUMULATION OCCURS WILL HIGHLY DEPEND ON PRECIPITATION
AMOUNTS...WHICH WILL IN TURN HIGHLY DEPEND ON THE EVOLUTION OF THE
SFC CYCLONE AS OUTLINED ABOVE. GIVEN THE PRECIP AMOUNTS CURRENTLY
ANTICIPATED AND THE TIMING OF THE CHANGEOVER...EXPECT A POTENTIAL
FOR UP TO AN INCH OF ACCUMULATION EAST OF HIGHWAY 1 SATURDAY
EVENING/NIGHT...PRIMARILY FROM THE TRIANGLE EAST TO GOLDSBORO NORTH
TO ROANOKE RAPIDS. A MORE THOROUGH DISCUSSION WILL BE FORTHCOMING
SHORTLY. -VINCENT

&&
 

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What is the timeframe for this? Seeing it fall is the best part unless your a kid. I hope its not while we sleep.

Looking at Bufkit , before most 6z runs... CAE will see snow of some fashion. Models/ensembles ranges from 0.00 to around 7 inches.

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Awesome trends guys and it's good to see the Euro finally fold. This should once and for all prove that for this winter the Euro really hasn't been king, especially for the SE. We'll see where we finally end up but something tells me this one could def. overperform and given the RAP really juicing those vorts up we could have something big on our hands.

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607 AM EST FRI FEB 15 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NORTH CAROLINA.

.DAY ONE...TODAY AND TONIGHT.

HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

A POTENT UPPER LEVEL DISTURBANCE OVER THE ROCKIES WILL DIG

SOUTHEAST THROUGH THE CENTRAL PLAINS AND LOWER MISSISSIPPI RIVER

VALLEY TONIGHT...THEN TRACK EAST THROUGH THE CAROLINAS LATE

SATURDAY AND SATURDAY NIGHT. PRECIPITATION IS EXPECTED TO DEVELOP

OVER THE CAROLINAS SATURDAY AFTERNOON AS AN ASSOCIATED LOW PRESSURE

SYSTEM BEGINS TO INTENSIFY OFFSHORE THE CAROLINA COAST...ENDING FROM

WEST TO EAST SATURDAY NIGHT.

PRECIPITATION IS EXPECTED TO BEGIN AS RAIN SATURDAY AFTERNOON...

HOWEVER...PROBABILITIES ARE INCREASING THAT A CHANGEOVER TO SNOW

WILL OCCUR BEFORE PRECIPITATION ENDS SATURDAY EVENING INTO

SATURDAY NIGHT. ACCUMULATING SNOW WILL BE POSSIBLE...PRIMARILY

EAST OF HIGHWAY 1. THIS INCLUDES THE TRIANGLE...GOLDSBORO...ROCKY

MOUNT...AND ROANOKE RAPIDS.

PRECIPITATION AMOUNTS OVER CENTRAL NORTH CAROLINA WILL HIGHLY

DEPEND ON THE PRECISE TRACK AND STRENGTH OF THE SURFACE LOW...

WHICH REMAINS UNCERTAIN AT THIS TIME. RESIDENTS OF CENTRAL NORTH

CAROLINA ARE ENCOURAGED TO CLOSELY MONITOR THE FORECAST THIS

WEEKEND...AND TO BE PREPARED FOR A PERIOD OF WINTRY WEATHER LATE

SATURDAY AND SATURDAY NIGHT.

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Atlanta:

 

 

THE NEXT ISSUE IS THE POTENTIAL FOR WINTRY PRECIP ON SATURDAY. BOTHTHE GFS AND NAM HAVE A BULLSEYE OF OVER 1 INCH SOUTH OF CSG BY 18ZSATURDAY. 21Z SREF PROBS KEPT THE PROBABILITY OF MEASURABLE SNOWMUCH FARTHER NORTH...BUT THE NEW 03Z RUN JUST COMING IN LENDS MUCHMORE CREDENCE TO THE NAM AND GFS SOLUTIONS WITH A SWATH OF 60-70PERCENT MEASURABLE SNOW BETWEEN THE NORTHEAST MOUNTAIN AND CTJ AT12Z SATURDAY...AND BETWEEN ATL AND CSG AT 15Z /THOUGH THESE PROBSARE FOR LESS THAN 1 INCH ACCUM/. OF COURSE...THE VERY STRONG CAAWILL BE COMPETING WITH RETREATING MOISTURE. VERY STEEP LAPSE RATESFROM 18-21Z ON SATURDAY WILL LEAD TO A VERY CONVECTIVELY-DRIVENEVENT WITH WIDESPREAD COLD AIR STRATOCU OR PERHAPS EVEN COLD AIRCU...BUT THE DEPTH OF CONVECTION WILL BE VERY DEPENDENT ON MOISTUREAVAILABILITY AS THE UPPER TROUGH AXIS WILL BE MOVING INTO THE AREABY THAT SAME TIME...PUSHING THE BEST MOISTURE TOWARD THE CAROLINAS.850MB TEMPS DROP SIGNIFICANTLY DURING THE DAY WITH THE STRONG CAAALOFT SO THICKNESSES ALL AGREE ON SNOW AT 850MB...IT IS JUST AMATTER OF WHETHER IT WILL MELT BEFORE REACHING THE GROUND. WITH THEEXPECTED CONVECTION...IT IS LIKELY THAT AT LEAST SOME SNOW WILLREACH THE GROUND ACROSS MOST OF THE CWA IN A BRIEF WINDOW WHEREINCOMING COLD TEMPS WILL LINE UP BEST WITH THE MOISTURE. HOWEVER...IN CONVECTION...SURFACE TEMPS DO NOT HAVE TO BE QUITE AS COLD FORSNOW TO REACH THE GROUND...SO EXPECT THAT SNOW WILL FALL AT TEMPS INTHE MID AND POSSIBLY UPPER 30S. THIS SAID...HAVE BROUGHT THERAIN/SNOW MIX DOWN TO EXTREME SOUTHWEST ZONES FOR SATURDAYMORNING...WITH ALL SNOW AS FAR SOUTH AS A FRANKLIN TO MCDONOUGH TOATHENS LINE. AT THIS POINT...NO ACCUMULATIONS ARE EXPECTED ASMOISTURE IS JUST NOT REALLY DEEP ENOUGH BUT MOISTURE TRENDS WILLHAVE TO BE MONITORED.
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