MESOSCALE DISCUSSION 0304
   NWS STORM PREDICTION CENTER NORMAN OK
   0712 PM CDT FRI MAR 27 2009
   
   AREAS AFFECTED...SRN KS...OK/TX PANHANDLES...WRN/CNTRL OK
   
   CONCERNING...WINTER MIXED PRECIPITATION 
   
   VALID 280012Z - 280415Z
   
   HEAVY SNOW HAS COMMENCED ACROSS NWRN OK...SWRN/S CNTRL KS...AND THE
   TX PANHANDLE. STRONG WINDS WITH GUSTS OF 35 TO 40 MPH WILL CREATE
   BLIZZARD CONDITIONS IN BLOWING SNOW. NEAR THE SURFACE FREEZING
   LINE...HEAVY ACCUMULATIONS OF SLEET WILL BE LIKELY IN PORTIONS OF W
   CNTRL/N CNTRL OK INTO S CNTRL KS. JUST E OF THESE AREAS...A NARROW
   ZONE OF FREEZING RAIN MAY OCCUR IN S CNTRL KS AND N CNTRL OK.
   
   AS OF 23Z...THE SURFACE FREEZING LINE EXTENDS ROUGHLY FROM NEAR
   EMPORIA KS SWWD TO NEAR CHILDRESS TX. STRONG WARM ADVECTION
   CONTINUES ACROSS MUCH OF N CNTRL TX INTO SRN KS...WITH ELEVATED
   THUNDERSTORMS IN THE ERN PORTIONS OF THESE STATES. E OF THE SURFACE
   FREEZING LINE...RAIN/THUNDERSTORMS WILL CONTINUE. ACROSS S CNTRL KS
   AND PORTIONS OF N CNTRL OK SURFACE TEMPERATURES WILL REMAIN NEAR
   FREEZING...WHILE WARM ADVECTION JUST ABOVE THE SURFACE WILL BE
   SUPPORTIVE OF FREEZING RAIN. JUST W OF THESE AREAS BUT ALSO CLOSE TO
   THE FREEZING LINE...DESPITE WARM ADVECTION ABOVE THE
   SURFACE...PROFILES WILL REMAIN BELOW FREEZING...AND WILL BE
   SUPPORTIVE OF HEAVY ACCUMULATIONS OF SLEET. THE SURFACE FREEZING
   LINE WILL MOVE VERY LITTLE OVER THE NEXT FEW HOURS...AND THESE
   TRENDS WILL CONTINUE.
   
   ELSEWHERE...THE UPPER LOW WILL DEEPEN OVER CNTRL OK BEFORE SHIFTING
   EWD. UVV WILL BE STRONGEST OVER NWRN OK AND THE NERN TX
   PANHANDLE...WHERE SNOW RATES OF 2 INCH/HR WILL BE POSSIBLE. CNTRL OK
   MAY BE SLOW TO CHANGE OVER TO SNOW...BUT AS THE LOW DEEPENS DYNAMIC
   COOLING MAY ALLOW A FASTER CHANGE OVER THAN MODEL FORECAST.
   
   ..HURLBUT.. 03/28/2009
   
   
   ATTN...WFO...TSA...TOP...ICT...OUN...DDC...LUB...AMA...
   
   LAT...LON   35319801 34309992 34990159 36770186 38010101 38919886
               38939777 38449650 36359713 35319801