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3/6 - 3/7 Event is it this seasons last gasp?


WXinCanton

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I wonder what part of central NC he means, just big time for the Triad or the RDU area, too.

Robert posted this on Facebook. Guess it kind of addresses your question brick.......

Terrible setup in Carolinas. High pressure remains inland most of storm. Strong damming Raleigh, Greensboro, Charlotte. #ice #snow.

That was his post an hour ago.

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Also:

@WxSouth: Folks in upper SC and north GA that sort of got skipped a couple times this Winter, this storm's for you. Models will get even colder #gawx

He's only missed once that I know of, it was a few years ago with an ULL and said upstate would change to heavy snow , but it never did. But when he talks like that, I get excited! # WEENIE
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Based off the rough maps. The Ukmet trended much colder at 850mb for NC/SC compared to the 12z run(which was already one of the coldest models).  Also looks faster with the upper level low. It looks more in line with the GFS, I would say.

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GFS Sounding for 1am Friday when it’s really coming down for Pickens,SC.  The Nam isn’t even close to snow.... which one do I believe???

 

NAM runs the 850mb low from Columbia to the Outer Banks, whereas the GFS tracks it right along the Carolina coast.  Euro is similar to the GFS...so that's the big difference with the mid level warming.

 

As a matter of fact, just looking at the soundings, I could see the majority of precip along and north of 74 from Rutherfordton to maybe Charlotte being mostly snow or sleet through 36.

 

GFS is just textbook for snow in central / western NC and SC upstate.  500mb / 700mb lows tracking through the coastal plain / inland of the coast...850mb low tracking from south GA right up the Carolina coast.  Sfc low just off the coast.  Biggest issue is the retreating high caused by progressive northern stream.  Euro Ensemble mean storm total precip is 1.3 for Charlotte, 0.8 for Asheville, 0.6 for Boone, 1.0 for Greensboro, 1.2 for Raleigh, 1.2 for Greenville, SC.  Euro Op precip values are higher for all sites.

 

On temperatures, what we normally see is that the surface temperatures tend to be on the colder end of the guidance with cold air damming like this...while the warming aloft via warm air advection / warm nose tends to be on the warmer end of the guidance, but that's highly dependent on the 850mb low track.

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That's not really saying much.

 

The triangle is right on the line, even with everything going on I still think it's mostly a non-event for us, even if we get sleet/frzn from say midnight to 6am, by 7am it's pouring rain it will all be gone.  I think west of 85 is the best bet to get a good ice storm.  But it's the last event of the year, might as well watch it.  I hope someone get's a good winter event out of this, hate to waste a great coastal, closed ULL...

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ACCUMULATING SNOWFALL AN INCREASING POSSIBILITY FOR NORTHEAST MOUNTAINS

A COLD UPPER LEVEL LOW WILL PROGRESS ACROSS GEORGIA TOMORROW AFTERNOON SPREADING WIDESPREAD PRECIPITATION OVER THE AREA BY THE AFTERNOON HOURS. AS THE PRECIPITATION FALLS

SURFACE TEMPERATURES WILL BEGIN TO COOL AND RESULT IN LIGHT SNOW MIXING IN WITH THE RAIN AT TIMES FOR THE HIGHER ELEVATIONS OF THE NORTHEAST MOUNTAINS. FURTHER COOLING SUGGESTED BY SOME COMPUTER MODELS WOULD ALLOW FOR MORE PREDOMINANT SNOW BY THURSDAY EVENING. GIVEN THE UNCERTAINTY WITH THIS SYSTEM AS WELL AS THE VERY NATURE OF THESE TYPE OF UPPER LEVEL STORMS

CONFIDENCE IS LOW AS TO EXACTLY HOW MUCH SNOW ACCUMULATION THE NORTHEAST MOUNTAINS WILL SEE. OUR BEST PROJECTIONS RIGHT NOW INDICATE THAT WARM TEMPERATURES WILL LIMIT THE ACCUMULATIONS INITIALLY AND THE MIXED NATURE OF THE PRECIPITATION WILL ALLOW FOR AROUND AN INCH ACCUMULATION. IT SHOULD BE NOTED THAT THE BANDED TYPE OF PRECIPITATION SEEN WITH UPPER LOWS WILL ALLOW FOR A WIDE RANGE OF POTENTIAL SNOWFALL TOTALS OVER A SHORT DISTANCE WITH THE POTENTIAL FOR ISOLATED AREAS TO RECEIVE HIGHER AMOUNTS THAN THE AVERAGE ONE INCH.

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gfs certainly is interesting.  Taken the gfs soundings verbatim though, hour by hour, shows it going from all rain to all snow, to a mix of everything, or in reverse. It really and literally would change by the hour. Probably a case where any heavier precipitation causes snow and when it lightens up it's rain, sleet, or a mix. Pretty wild setup as conditions and accumulations would vary drastically from place to place.

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gfs certainly is interesting.  Taken the gfs soundings verbatim though, hour by hour, shows it going from all rain to all snow, to a mix of everything, or in reverse. It really and literally would change by the hour. Probably a case where any heavier precipitation causes snow and when it lightens up it's rain, sleet, or a mix. Pretty wild setup as conditions and accumulations would vary drastically from place to place.

 

Are you referring to a specific area or just in general?

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gfs certainly is interesting.  Taken the gfs soundings verbatim though, hour by hour, shows it going from all rain to all snow, to a mix of everything, or in reverse. It really and literally would change by the hour. Probably a case where any heavier precipitation causes snow and when it lightens up it's rain, sleet, or a mix. Pretty wild setup as conditions and accumulations would vary drastically from place to place.

Are yall colder than guidance right now?  its been fair skies down here, and further SW of us as well, and temps have cooled to 41 now.

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This was the latest update from GSP Discussion 

.NEAR TERM /UNTIL 6 AM THURSDAY MORNING/...
AS OF 945 PM EST WED...THE 18Z AND INCOMING 00Z MODEL TRENDS ARE A
BIT TROUBLING IN THAT THE MODEL PROFILES HAVE TRENDED A BIT
COLDER...WITH MORE OF A LINGERING ISOTHERMAL NEAR ZERO SETUP
INDICATED OVER THE MOUNTAINS DURING THE UPCOMING PRECIPITATION
EVENT. IN ADDITION...QPF REACHING INTO THE COLDER AIR APPEARS A BIT
MORE ROBUST THAN EARLIER. THE FORECAST HAS BEEN ADJUSTED SLIGHTLY
COLDER WITH THE LATEST UPDATE...BUT WITH NO MAJOR CHANGES TO ACCUMS
AT THIS POINT PENDING A MORE COMPLETE REVIEW OF THE INCOMING 00Z
MODEL DATA AND THE LATEST ENSEMBLES.

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