MESO: Mesoscale Discussion 2055

ACUS11 KWNS 051154
SWOMCD
SPC MCD 051153
TXZ000-NMZ000-051500-

MESOSCALE DISCUSSION 2055
NWS STORM PREDICTION CENTER NORMAN OK
0553 AM CST THU DEC 05 2013

AREAS AFFECTED...FAR SERN NM...TX PERMIAN BASIN

CONCERNING...FREEZING RAIN

VALID 051153Z - 051500Z

SUMMARY...AREAS OF FREEZING RAIN WITH RATES AOA 0.02 IN/HR WILL BE
POSSIBLE THIS MORNING OVER FAR SERN NM AND THE TX PERMIAN BASIN.

DISCUSSION...SURFACE FRONT WAS ANALYZED THIS MORNING FROM CNTRL NM
SWD INTO FAR W TX...AND THEN EWD INTO SRN TX. COMBINATION OF
FRONTOGENETIC CIRCULATION AND MINOR IMPULSES MOVING THROUGH SWLY
REGIME ALOFT IS AIDING IN SHOWER DEVELOPMENT OVER PORTIONS OF THE TX
TRANS-PECOS...WHICH IS SUBSEQUENTLY SPREADING DOWNSTREAM ACROSS THE
PERMIAN BASIN. TEMPERATURES BEHIND THE FRONT ARE CURRENTLY IN THE
20S TO LOW 30S...WITH DEWPOINTS FROM THE MID TEENS TO MID 20S.
HEAVIER SHOWERS WILL AID IN WET BULB COOLING AND DEVELOPMENT OF
SUB-FREEZING SURFACE TEMPERATURES BENEATH A WARM LAYER OF AIR
RESIDING BETWEEN 850-700 MB. THIS WILL FAVOR AREAS OF FREEZING RAIN
DURING THE MORNING WITH RATES AOA 0.02 IN/HR.

..GARNER.. 12/05/2013

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

ATTN...WFO...SJT...LUB...MAF...ABQ...

LAT...LON 31540120 31200226 31470335 32260415 32690419 33100379
33250296 32790161 32220097 31540120

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