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Mesoscale Discussion 70
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   MESOSCALE DISCUSSION 0070
   NWS STORM PREDICTION CENTER NORMAN OK
   1105 AM CST TUE JAN 29 2013
   
   AREAS AFFECTED...PORTIONS OF CNTRL/SWRN MO...NWRN AR...NERN
   OK...EXTREME SERN KS
   
   CONCERNING...TORNADO WATCH 6...
   
   VALID 291705Z - 291800Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 6 CONTINUES.
   
   SUMMARY...THE THREAT FOR SVR THUNDERSTORMS INCLUDING DMGG WINDS AND
   TORNADOES CONTINUES ACROSS WW6.
   
   DISCUSSION...A SQUALL LINE WITH EMBEDDED BOWING SEGMENTS EXTENDS
   FROM CNTRL MO SWWD INTO S-CNTRL OK AS OF 17Z. AHEAD OF THE
   LINE...MARGINAL INSTABILITY EXISTS AMIDST STRONG VERTICAL
   SHEAR...WITH 0-1-KM SRH AROUND 425 M2/S2 AND OVER 60 KT OF DEEP
   SHEAR PER SGF VWP. THIS WILL MAINTAIN ORGANIZED STORM STRUCTURES --
   BOWS AND PERHAPS SUPERCELLS -- EMBEDDED WITHIN THE LINE. THESE WILL
   BE CAPABLE OF DMGG WINDS AND TORNADOES...ESPECIALLY WITH CONVECTION
   NOT UNDERCUT BY THE OUTFLOW BOUNDARY ACCOMPANYING THE SQUALL LINE.
   ADDITIONAL CONVECTION IS DEVELOPING AHEAD THE LINE ACROSS NERN
   OK...NWRN AR...AND SWRN MO INVOF RICHER LOW-LEVEL MOISTURE -- I.E.
   LOWER 60S DEWPOINTS. IN THIS AREA...THE TORNADO THREAT WOULD
   INCREASE IF THESE STORMS BECOME SFC BASED AND EXHIBIT SEMI-DISCRETE
   CONVECTIVE MODES. THE SVR THREAT WILL BE NIL BEHIND THE SQUALL LINE.
   
   ..COHEN.. 01/29/2013
   
   ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
   
   ATTN...WFO...LSX...LZK...SGF...EAX...TSA...ICT...OUN...
   
   LAT...LON   38919339 38369221 37589240 36599318 35759366 35379438
               35399669 36759547 38919339 
   
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