MESOSCALE DISCUSSION 0448
   NWS STORM PREDICTION CENTER NORMAN OK
   0753 PM CDT THU APR 06 2006
   
   AREAS AFFECTED...ERN OK
   
   CONCERNING...TORNADO WATCH 155...157...
   
   VALID 070053Z - 070230Z
   
   ...HIGH POTENTIAL FOR TORNADOES AND LARGE HAIL WITH DISCRETE
   SUPERCELLS NOW MOVING ACROSS ERN OK....
   
   LATEST RADAR IMAGERY SHOWS SEVERAL SUPERCELL TSTMS EXTENDING FROM
   FAR SE KS TO SE OK. ENVIRONMENTAL PARAMETERS ARE VERY FAVORABLE FOR
   STORM ROTATION...WITH 0-1 SRH NEAR 400 M2/S2. HASKELL OK PROFILER
   AND VAD DATA FROM BOTH TULSA AND FORT SMITH SHOW VERY IMPRESSIVE
   DIRECTION/SPEED SHEAR WITH 50 KT OBSERVED NEAR 1 KM. LAMONT AND
   PURCELL PROFILER DATA ALSO SHOW 100KT DOWN TO 3KM...INDICATING THE
   EXTREMELY STRONG WINDS...ASSOCIATED WITH EJECTING JET STREAK.
   SEVERAL OF THESE STORMS HAVE ALREADY PRODUCED BRIEF
   TORNADOES...INCLUDING A RECENT REPORT OF A TORNADO WEST OF EUFAULA
   DAM IN HASKELL CO JUST BEFORE 730PM. STORM SIGNATURES DO INDICATE
   THAT STORMS ARE FEELING THE EFFECTS OF THE EXTREME SHEAR. 
   
   HOWEVER...THE STORMS /BY MAINTAINING SOME SPACE BETWEEN CELLS/ ARE
   NOT DESTRUCTIVELY INTERFERING...WHICH DOES INCREASE THE POTENTIAL
   FOR TORNADOES. BEST POTENTIAL APPEARS TO BE ACROSS SE OK INTO WCNTRL
   AR. AIRMASS IS SLIGHTLY MORE STABLE ACROSS NW AR...BUT MOISTURE IS
   RAPIDLY RETURNING IN A SLIGHTLY ELEVATED FASHION. STRENGTH OF SHEAR
   SUGGESTS SEVERE THREAT WILL SPREAD INTO PORTIONS OF WW 157 /INTO NRN
   AND WRN AR/ THROUGH LATER THIS EVENING.
   
   ..TAYLOR.. 04/07/2006
   
   
   ATTN...WFO...LZK...SGF...SHV...TSA...FWD...OUN...
   
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