[BNAWX] Severe Storm Outlook Narrative

[EMWIN Server]

ACUS11 KWNS 092104
SWOMCD
SPC MCD 092103
ALZ000-TNZ000-MSZ000-ARZ000-LAZ000-100130-

MESOSCALE DISCUSSION 0102
NWS STORM PREDICTION CENTER NORMAN OK
0303 PM CST WED FEB 09 2011

AREAS AFFECTED...NERN LA...ERN AR...CNTRL/NRN MS...SWRN TN...NWRN AL

CONCERNING...HEAVY SNOW

VALID 092103Z - 100130Z

SNOW WILL CONTINUE SHIFTING EWD ACROSS THE ARKLAMISS REGION AND
MID-SOUTH THROUGH LATE AFTERNOON INTO EARLY EVENING...WITH RATES OF
1 INCH PER HOUR EXPECTED.

MOIST ISENTROPIC ASCENT ATOP AN ARCTIC AIR MASS ADVANCING INTO THE
LOWER MISSISSIPPI VALLEY WILL CONTINUE TO SUPPORT THE EWD SHIFT OF
PRECIPITATION INTO THIS EVENING. PRECIPITATION WILL CHANGE FROM RAIN
TO SNOW ACROSS SERN PORTIONS OF THE DISCUSSION AREA AS WET-BULB
SURFACE TEMPERATURE READINGS FALL AOB FREEZING...WITH THE RAIN-SNOW
LINE LIKELY EXTENDING FROM 35 SW HSV TO 30 ENE JAN TO 35 ESE MLU BY
00Z PER THE 18Z RUN OF THE EXPERIMENTAL HRRR. SNOWFALL RATES ARE
EXPECTED TO INTENSIFY TO 1 INCH PER HOUR...AS AN AXIS OF DEEPER
MOISTURE TRAVERSES THE AREA. THE HIGHEST SNOWFALL RATES WILL BE MOST
LIKELY ALONG AND SOUTH OF THE HIGHWAY 82 CORRIDOR...WHERE THE NAM
MODEL INDICATES 800-700-MB FRONTOGENESIS INCREASING AFTER 00Z IN
CONJUNCTION WITH INCREASING SLANTWISE INSTABILITY AND PWAT VALUES OF
0.70 TO 0.80 INCH.

..COHEN/BROYLES.. 02/09/2011

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

ATTN...WFO...OHX...BMX...HUN...MEG...JAN...LZK...

LAT...LON   34748708 33028851 32179089 32689161 34129099 35378933
            35518786 34748708



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