[BNAWX] Severe Storm Outlook Narrative

[EMWIN Server]

ACUS11 KWNS 100457
SWOMCD
SPC MCD 100456
SCZ000-NCZ000-GAZ000-TNZ000-ALZ000-101000-

MESOSCALE DISCUSSION 0016
NWS STORM PREDICTION CENTER NORMAN OK
1056 PM CST SUN JAN 09 2011

AREAS AFFECTED...S-CNTRL THROUGH SERN TN...NRN AL AND NRN GA THROUGH
WRN SC AND SWRN NC

CONCERNING...HEAVY SNOW

VALID 100456Z - 101000Z

BANDS OF MODERATE TO HEAVY SNOW WITH RATES LOCALLY 1-1.5 INCHES PER
HOUR WILL CONTINUE DEVELOPING NEWD THROUGH NE AL...NRN GA...S-CNTRL
THROUGH SERN TN...SWRN NC AND WRN SC THROUGH THE EARLY MORNING. SOME
SLEET COULD MIX WITH THE SNOW ACROSS PARTS OF NRN AL AND NRN GA.

STRONG SLY 60+ KT LLJ WILL LIFT NEWD THROUGH AL AND GA INTO THE
EARLY MORNING IN ASSOCIATION WITH AN EJECTING NEGATIVELY TILTED
SHORTWAVE TROUGH CURRENTLY LOCATED OVER MS. STRONG FRONTOGENETIC
FORCING AND ISENTROPIC LIFT ASSOCIATED WITH THIS FEATURE HAS
RESULTED IN BANDS OF WIDESPREAD MODERATE TO LOCALLY HEAVY SNOW FROM
NRN MS...NRN AL AND NRN GA INTO SRN TN. STEEPER MID-LEVEL LAPSE
RATES DEVELOPING WITHIN ZONE OF STRONGER ASCENT HAVE RESULTED IN
SOME CONVECTIVE ENHANCEMENT TO THE SNOW WHERE LIGHTNING HAS RECENTLY
BEEN OBSERVED ACROSS NRN AL. RUC SOUNDINGS INDICATE PRESENCE OF A
DEEP QUASI-ISOTHERMAL LAYER WITH TEMPERATURES FROM 0 TO -5C BETWEEN
THE SURFACE AND 700 MB SUPPORTIVE OF AN EFFICIENT AGGREGATION
PROCESS. ZONE OF HEAVIER SNOW WILL EXPAND NEWD WITH
TIME...EVENTUALLY INTO SERN TN AND THE WRN CAROLINAS.

..DIAL.. 01/10/2011

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

ATTN...WFO...GSP...MRX...FFC...OHX...BMX...HUN...

LAT...LON   34288224 34468585 35358650 35628507 35088186 34288224



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