MESOSCALE DISCUSSION 2200
   NWS STORM PREDICTION CENTER NORMAN OK
   1208 AM CST MON DEC 10 2007
   
   AREAS AFFECTED...NORTH CENTRAL TX/MUCH OF OK/SOUTHEAST KS AND
   CENTRAL/SOUTHERN MO
   
   CONCERNING...FREEZING RAIN 
   
   VALID 100608Z - 101115Z
   
   FREEZING RAIN WITH OCCASIONAL LIGHTNING/THUNDER IS EXPECTED TO
   CONTINUE THROUGH THE EARLY MORNING HOURS FROM NORTH CENTRAL TX
   ACROSS MUCH OF OK INTO SOUTHEAST KS...WITH A STEADY INCREASE LIKELY
   ACROSS CENTRAL/SOUTHERN MO THROUGH 09Z-12Z. THE GREATEST
   CONCENTRATION OF FREEZING RAIN WILL GENERALLY BE CENTERED ALONG THE
   I-44 CORRIDOR /50-75 MILES EITHER SIDE/ INCLUDING LOCATIONS FROM
   WICHITA FALLS TX TO OKLAHOMA CITY/TULSA OK TO
   JOPLIN/SPRINGFIELD/JEFFERSON CITY/ST LOUIS MO.
   ADDITIONAL/SIGNIFICANT ICE ACCUMULATIONS ARE EXPECTED THROUGH EARLY
   MORNING.
   
   REGIONAL PROFILERS/WSR-88D VWP DATA ARE SAMPLING A MODERATE
   SOUTHWESTERLY LOW LEVEL JET /35-40 KT/ LATE THIS EVENING AS IMPLIED
   ISENTROPIC LIFT/MOISTURE TRANSPORT REGIME IS OCCURRING WITHIN
   ELEVATED BAROCLINIC ZONE ACROSS THE SOUTHERN PLAINS/OZARKS.
   AS FREEZING RAIN/SCATTERED THUNDERSTORMS CONTINUE GENERALLY CENTERED
   ALONG THE I-44 CORRIDOR FROM NORTH CENTRAL TX/MUCH OF OK INTO
   SOUTHWEST MO...00Z OBSERVED SOUNDINGS FROM NORMAN OK/LAMONT
   OK/SPRINGFIELD MO EXHIBIT CLASSIC THERMODYNAMIC PROFILES FOR
   FREEZING RAIN VIA A 500-750M SHALLOW SUB-FREEZING AIRMASS BENEATH A
   PRONOUNCED WARM/POTENTIALLY UNSTABLE LAYER NEAR 850 MB. AS HAS BEEN
   THE CASE THIS EVENING...OCCASIONAL THUNDERSTORMS WILL LIKELY
   CONTINUE OVERNIGHT...WITH SEVERAL HUNDRED J/KG ELEVATED MUCAPE BASED
   ON OBSERVED 00Z RAOBS/LATEST RUC SOUNDINGS. EMBEDDED CONVECTIVE
   ELEMENTS WILL CONTINUE TO RESULT IN SHORT DURATION BURSTS OF HIGHER
   PRECIPITATION/FREEZING RAIN RATES OVERNIGHT.
   
   ..GUYER.. 12/10/2007
   
   
   ...NOTICE...
   SPC WINTER WEATHER MESOSCALE DISCUSSIONS WILL BE ISSUED ON A
   SCHEDULED BASIS FROM DECEMBER 1 THROUGH FEBRUARY 28...FOUR
   TIMES A DAY...AROUND 00 UTC...06 UTC...12 UTC...AND 18 UTC
   FOR SIGNIFICANT SHORT RANGE WINTER WEATHER EVENTS.
   
   ATTN...WFO...LSX...SGF...EAX...TSA...TOP...ICT...FWD...OUN...SJT...
   
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   34789988 36329815 38039513