MESO: Mesoscale Discussion 2204

ACUS11 KWNS 250833
SWOMCD
SPC MCD 250832
OKZ000-251230-

MESOSCALE DISCUSSION 2204
NWS STORM PREDICTION CENTER NORMAN OK
0232 AM CST TUE DEC 25 2012

AREAS AFFECTED...PORTIONS OF WESTERN AND CENTRAL OKLAHOMA

CONCERNING...WINTER MIXED PRECIPITATION

VALID 250832Z - 251230Z

SUMMARY...SNOW...SLEET AND FREEZING RAIN WILL IMPACTS PARTS OF
WESTERN AND CENTRAL OK THE NEXT FEW HOURS. WHILE PRECIPITATION IS
EXPECTED TO BE SCATTERED AND LIGHT...HAZARDOUS TRAVEL CONDITIONS CAN
DEVELOP WITH ONLY SMALL ICE ACCUMULATION.

DISCUSSION...LOW LEVEL MOISTURE WAS BEING TRANSPORTED INTO THE AREA
VIA ELY LOW LEVEL FLOW /AS EVIDENT IN KTLX 88-D VWP DATA/. AN
INITIAL SHORTWAVE IMPULSE MOVING ACROSS CENTRAL OKLAHOMA EARLY THIS
MORNING AHEAD OF THE MAIN UPPER TROUGH WAS PROVIDING FORCING FOR
ASCENT AND RESULTING IN LIGHT WINTRY MIX PRECIP TYPES. FREEZING
RAIN/SLEET AND SNOW RATES WILL BE LOW THE NEXT FEW HOURS AS MIDLEVEL
MOISTURE ONLY SLOWLY INCREASES. HOWEVER...LIGHT ACCUMULATIONS OF
SLEET AND FREEZING RAIN ON ROADWAYS WILL LEAD TO HAZARDOUS TRAVEL
CONDITIONS. AS MID LEVEL TEMPERATURES COOL AFTER SUNRISE...SLEET MAY
MIX WITH SNOW FOR A BRIEF PERIOD BEFORE A TRANSITION TO ALL SNOW
OCCURS AND PRECIPITATION BECOMES HEAVIER.

..LEITMAN.. 12/25/2012

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

ATTN...WFO...TSA...OUN...

LAT...LON 34689926 35049947 35699940 36289885 36409816 36439732
36479686 36349657 35899631 35119626 34819638 34569688
34509742 34459799 34559871 34689926

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