SWOMCD
SPC MCD 201139
NCZ000-VAZ000-201545-
MESOSCALE DISCUSSION 0044
NWS STORM PREDICTION CENTER NORMAN OK
0540 AM CST TUE JAN 20 2009
AREAS AFFECTED...ERN NC
CONCERNING...HEAVY SNOW
VALID 201139Z - 201545Z
SNOWFALL WILL CONTINUE ACROSS ERN NC THIS MORNING INTO EARLY
AFTERNOON. SOME AREAS COULD RECEIVE MODERATE TO HEAVY SNOW LATE THIS
MORNING.
A LARGE UPPER-LEVEL TROUGH IS EVIDENT ON WATER VAPOR IMAGERY OVER
THE OH AND TN VALLEYS WITH A WELL-DEFINED DRY SLOT ROUNDING THE BASE
OF THE TROUGH EXTENDING NEWD ACROSS THE SRN HALF OF SOUTH CAROLINA.
LARGE-SCALE ASCENT ALONG THE LEADING EDGE OF THE DRY SLOT WILL AID
THE DEVELOPMENT OF SEVERAL AREAS OF MODERATE TO HEAVY SNOWFALL THIS
MORNING. THE ZONE WITH THE GREATEST POTENTIAL SHOULD BE FROM SCNTRL
NC EXTENDING ENEWD INTO NERN NC WHERE ISENTROPIC LIFT IS LIKELY TO
BE MAXIMIZED ALONG THE TRACK OF A VORTICITY MAX EVIDENT ON RADAR
IMAGERY. MID-LEVEL LAPSE RATES ON FORECAST SOUNDINGS LATE THIS
MORNING APPEAR STEEP ENOUGH FOR CONVECTIVE SNOW BURSTS. THIS COULD
BE ENOUGH FOR HEAVY SNOWFALL IN A FEW SPOTS LATE THIS MORNING.
..BROYLES.. 01/20/2009
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
...NOTICE...
SPC WINTER WEATHER MESOSCALE DISCUSSIONS WILL BE ISSUED ON A
SCHEDULED BASIS FROM DECEMBER 1 THROUGH FEBRUARY 28...FOUR
TIMES A DAY...AROUND 00 UTC...06 UTC...12 UTC...AND 18 UTC
FOR SIGNIFICANT SHORT RANGE WINTER WEATHER EVENTS.
ATTN...WFO...AKQ...MHX...RAH...ILM...
LAT...LON 34937771 34827831 34887906 35507922 35967768 36577691
36517628 36117600 35707627 35437659 35177708 34937771
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