MESOSCALE DISCUSSION 0190
   NWS STORM PREDICTION CENTER NORMAN OK
   0649 AM CST SAT FEB 24 2007
   
   AREAS AFFECTED...NERN CO...CNTRL NEB...S-CNTRL SD...NWRN KS
   
   CONCERNING...BLIZZARD 
   
   VALID 241249Z - 241645Z
   
   BLIZZARD CONDITIONS ALONG WITH EMBEDDED BANDS OF HEAVY SNOW ARE
   EXPECTED TO BECOME INCREASINGLY WIDESPREAD BY 18Z. SNOWFALL RATES OF
   1 TO 2 IN/HR ARE LIKELY...MAINLY ACROSS THE NEB/SD PORTION OF THE
   AREA...CENTERED IN A SW TO NE CORRIDOR FROM AROUND IML TO ANW TO
   9V9. BLIZZARD CONDITIONS WILL BE MOST LIKELY INVOF THE CO/NEB/KS
   BORDER REGION. 
   
   AT 12Z...AN INTENSE SURFACE LOW WAS CENTERED AROUND 50 N DDC IN
   W-CNTRL KS. AN ARCING N-S ORIENTED SURFACE TROUGH HAS BEEN EMANATING
   N OF THE SURFACE ACROSS THE HEART OF CNTRL NEB AND CNTRL SD. THE
   SURFACE LOW IS EXPECTED TO MOVE SLOWLY EWD TO NEAR 40 W EMP BY 18Z.
   NWWD OF THE POTENT CYCLONE...A DEFORMATION AXIS OF MIXED
   PRECIPITATION HAS DEVELOPED FROM THE DENVER METRO AREA NEWD INTO
   CNTRL NEB. LATEST MODEL GUIDANCE ARE VERY CONSISTENT WITH
   MAINTAINING THIS AXIS THROUGH 18Z WITH JUST A SLOW NEWD PROGRESSION.
   AS THE LOW-LEVEL THERMAL PROFILE CONTINUES TO COOL TO THE W OF THE
   SURFACE TROUGH...RAIN WILL CHANGE TO ALL SNOW. WEAK ELEVATED
   CONVECTIVE INSTABILITY /AS EVIDENCED BY NUMEROUS CG LIGHTNING
   STRIKES NEAR LBF AND MCK/...ALONG WITH EXPECTED MESOSCALE
   BANDING...WILL AID IN SNOWFALL RATES FROM 1 TO 2 IN/HR AT TIMES
   ACROSS CNTRL NEB INTO S-CNTRL SD. 09Z RUC AND 06Z NAM/GFS GUIDANCE
   ALL INDICATE AN EXPANSION OF A 50 TO 55 KT NLY LLJ /PER 12Z RAP
   SOUNDING/ SWD ALONG THE HIGH PLAINS. THIS WILL MAINTAIN STRONG
   N/NWLY SFC WINDS AROUND 35 MPH INVOF THE CO/NEB/KS BORDER REGION.
   
   ..GRAMS.. 02/24/2007
   
   
   ATTN...WFO...FSD...ABR...LBF...UNR...GLD...BOU...CYS...
   
   43919943 43609921 42659908 41829979 40630067 39170155
   38930251 39280327 40260318 41450225 42470101 43470000