MESOSCALE DISCUSSION 0669
   NWS STORM PREDICTION CENTER NORMAN OK
   0555 PM CDT SAT MAY 16 2015

   AREAS AFFECTED...ERN PORTIONS OF THE TX/OK PANHANDLES INTO WRN
   OK/WRN N TX

   CONCERNING...TORNADO WATCH 175...177...

   VALID 162255Z - 170030Z

   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 175...177...CONTINUES.

   SUMMARY...SEVERE/TORNADO RISK CONTINUES ACROSS PORTIONS OF WW 175
   AND 177...AND APPEARS TO BE INCREASING ATTM.

   DISCUSSION...STORMS CONTINUE TO INCREASE ACROSS PORTIONS OF WW 175
   AND 177 ATTM...PARTICULARLY IN THE SWRN OK/WRN N TX VICINITY WHERE A
   FEW ISOLATED/SUPERCELL STORMS HAVE INTENSIFIED SIGNIFICANTLY OVER
   THE PAST HALF HOUR.  THE STRONGEST STORM ATTM IS MOVING ENEWD ACROSS
   THE RED RIVER VALLEY ALONG THE JACKSON CO OK/WILBARGER CO TX
   LINE...AND APPEARS TO CONTAIN A LARGE/SIGNIFICANT TORNADO.  ON ITS
   CURRENT TRACK...THIS TORNADO WOULD MOVE NEAR OR JUST N OF THE TOWN
   OF TIPTON OK...AND THEN TOWARD THE INDIAHOMA/CACHE/MEDICINE
   PARK/MEERS VICINITIES.  OTHER INTENSIFYING STORMS ARE LOCATED JUST
   SW OF THIS CELL OVER THE HARDEMAN/FOARD/NRN KNOX CO TX
   VICINITY...AND ALSO IN A BAND EXTENDING NWD INTO CUSTER CO OK.

   AS LOW-LEVEL FLOW STRENGTHENS FURTHER THIS EVENING...EXPECT THE
   TORNADO RISK TO INCREASE IN THE SHORT TERM...INCLUDING POTENTIAL FOR
   LONG-TRACK/SIGNIFICANT TORNADOES...ALONG WITH RISK FOR VERY LARGE
   HAIL/DAMAGING WINDS.

   ..GOSS.. 05/16/2015


   ATTN...WFO...TSA...FWD...OUN...SJT...LUB...AMA...

   LAT...LON   33260041 34900062 36760128 36969735 33909579 33369820
               33260041