[MCD] SWOMCD

Mon Dec 5 12:58:50 UTC 2005

ACUS11 KWNS 051256
SWOMCD
SPC MCD 051255 
VAZ000-WVZ000-051700-

MESOSCALE DISCUSSION 2534
NWS STORM PREDICTION CENTER NORMAN OK
0655 AM CST MON DEC 05 2005

AREAS AFFECTED...WRN/CNTRL VA AND FAR SE WV

CONCERNING...PRECIPITATION TRENDS...WINTER PRECIPITATION 

VALID 051255Z - 051700Z

SNOW IS EXPECTED TO DEVELOP/GRADUALLY INCREASE THIS MORNING ACROSS
THE FAR SE WV/WRN VA APPALACHIANS INTO THE CNTRL VA PIEDMONT. IN SRN
VA...INITIAL RAIN SHOULD BEGIN TO MIX WITH SNOW/SLEET BY 15Z-18Z.

12Z SURFACE/UPPER AIR ANALYSIS DEPICTS TIGHTENING BAROCLINIC ZONE
ACROSS THE CNTRL APPALACHIANS REGION...WITH BROAD MOISTURE/ASCENT
PLUME SPREADING NEWD ACROSS SRN VA AS LOW LEVEL CYCLONE GRADUALLY
EVOLVES ALONG THE GA/SC BORDER. ALTHOUGH 35-40F SFC TEMPS ARE COMMON
ACROSS MUCH OF WRN/CNTRL VA EARLY THIS MORNING...WITH
SATURATION/TIGHTENING BAROCLINIC GRADIENT...THERMODYNAMIC PROFILES
SHOULD COOL SUFFICIENTLY TO SUPPORT A RELATIVELY QUICK TRANSITION TO
WET SNOW. THIS SCENARIO IS SUPPORTED BY MID LEVEL SATURATION/LOW
LEVEL COOLING OBSERVED BETWEEN 00Z-12Z ROANOKE RAOBS...AS WELL AS
SREF PRECIP-TYPE CONSENSUS AND 09Z RUC FCST SOUNDINGS. IN SRN
VA...AFTER INITIAL BOUT OF RAIN...AFOREMENTIONED GUIDANCE SUGGESTS
SLEET/SNOW SHOULD MIX IN BY MID/LATE MORNING ALONG A
MARION-WYTHEVILLE-FARMVILLE-RICHMOND CORRIDOR.

..GUYER.. 12/05/2005

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...AKQ...LWX...RNK...RLX...MRX...

38367818 38087744 37367727 36747905 36618002 36658192
37118194 37698089 

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