000
ACUS11 KWNS 051641
SWOMCD
SPC MCD 051640
TXZ000-052045-

MESOSCALE DISCUSSION 2058
NWS STORM PREDICTION CENTER NORMAN OK
1040 AM CST THU DEC 05 2013

AREAS AFFECTED...SWRN THROUGH NWRN TX

CONCERNING...WINTER MIXED PRECIPITATION

VALID 051640Z - 052045Z

SUMMARY...MIXTURE OF FREEZING RAIN AND SLEET WITH RATES FROM .04-.08
INCHES PER HOUR WILL EXPAND NEWD THROUGH WRN INTO NWRN TX INTO THE
EARLY AFTERNOON. PRECIPITATION WILL AT LEAST TEMPORARILY TAPER FROM
THE WEST ACROSS PORTIONS OF SWRN TX EARLY THIS AFTERNOON.

DISCUSSION...THE SRN EXTENT OF A WEDGE OF COLD AIR ASSOCIATED WITH
ARCTIC HIGH PRESSURE OVER THE NRN HIGH PLAINS WILL REMAIN IN PLACE
ACROSS WRN TX TODAY. RECENT SURFACE OBSERVATIONS SHOW TEMPERATURES
IN THE LOW TO MID 20S FROM MIDLAND TO LUBBOCK AND CHILDRESS WITH
DEWPOINTS GENERALLY IN THE TEENS. AN AREA OF MOSTLY LIGHT
PRECIPITATION WITH RATES FROM .02-.1 INCH PER HOUR WILL EXPAND NEWD
THROUGH WRN TX. THE PRECIPITATION IS DEVELOPING IN ASSOCIATION WITH
A ZONE OF MID-LEVEL ASCENT ACCOMPANYING A NEWD EJECTING SHORTWAVE
TROUGH. AS INITIAL BAND OF ASCENT CONTINUES NEWD...PRECIPITATION
SHOULD AT LEAST TEMPORARILY TAPER OVER PORTIONS OF SWRN TX DURING
THE EARLY AFTERNOON. SWLY WINDS ALOFT WILL MAINTAIN A NOSE OF WARM
AIR ABOVE THE NEAR SURFACE SUBFREEZING LAYER...RESULTING IN A MIX OF
FREEZING RAIN AND SLEET.

..DIAL.. 12/05/2013

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

ATTN...WFO...OUN...SJT...LUB...MAF...

LAT...LON   33639971 31850175 31740263 33470242 34530006 33639971