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Mesoscale Discussion 566
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   MESOSCALE DISCUSSION 0566
   NWS STORM PREDICTION CENTER NORMAN OK
   0332 PM CDT SAT MAY 09 2015

   AREAS AFFECTED...SOUTH-CENTRAL OK AND NORTHERN/CENTRAL TX

   CONCERNING...TORNADO WATCH 150...

   VALID 092032Z - 092230Z

   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 150 CONTINUES.

   SUMMARY...LARGE HAIL AND TORNADO POTENTIAL IS EXPECTED TO STEADILY
   INCREASE ACROSS NORTH-CENTRAL TX THROUGH EARLY EVENING...INITIALLY
   IN AREAS JUST TO THE WEST OF THE DFW METROPLEX VICINITY. LOCALLY
   DAMAGING WINDS/MARGINALLY SEVERE HAIL AND POSSIBLY SOME TORNADO RISK
   WILL OTHERWISE CONTINUE ACROSS SOUTH-CENTRAL OK/FAR NORTHEAST TX.
   TORNADO WATCH 150 CONTINUES UNTIL 02Z.

   DISCUSSION...AN OUTFLOW BOUNDARY-RELATED EFFECTIVE WARM FRONT
   EXTENDS ROUGHLY WEST-EAST ACROSS FAR NORTH TX ROUGHLY ALONG THE
   NORTHERN EDGE OF THE METROPLEX AND THE ADJACENT NORTHERN TWO-TIERS
   OF COUNTIES OF NORTH TX. STORMS SHOULD CONTINUE TO DEVELOP ALONG THE
   I-20 CORRIDOR IN VICINITY OF BRECKENRIDGE/BROWNWOOD/STEPHENVILLE
   VICINITIES NEAR A SURFACE LOW/DRYLINE THROUGH LATE AFTERNOON. AS AT
   LEAST ISOLATED STORMS CONTINUE TO DEVELOP/MATURE AND SPREAD
   NORTHEASTWARD...LARGE HAIL WILL BE POSSIBLE...AND TORNADOES
   /INCLUDING A STRONG TORNADO RISK/ WOULD ESPECIALLY BE A CONCERN AS
   STORMS ENCOUNTER A STRONGER CORRIDOR OF LOW-LEVEL SOUTHERLY WINDS TO
   THE EAST AND/OR INTERACT WITH THE AFOREMENTIONED OUTFLOW BOUNDARY. A
   SPECIAL 19Z OBSERVED SOUNDING FROM DALLAS-FORT WORTH SAMPLED A VERY
   MOIST BOUNDARY LAYER /LOWER 70S F SURFACE DEWPOINTS/ WITH 300+ M2/S2
   EFFECTIVE SRH.

   FARTHER NORTH...THE PRIMARY SCENARIO WILL BE FOR CONTINUED STORM
   MERGERS AHEAD OF SOUTHEASTWARD-PROPAGATING OUTFLOW CURRENTLY ACROSS
   PORTIONS OF SOUTHWEST/SOUTH-CENTRAL OK. LOCALLY DAMAGING WINDS/SOME
   HAIL WILL BE THE PRIMARY HAZARDS ACROSS SOUTH-CENTRAL OK.

   ..GUYER.. 05/09/2015


   ATTN...WFO...TSA...FWD...OUN...SJT...

   LAT...LON   35389696 35079607 33719625 32039711 31799941 33959891
               35389696 

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Page last modified: May 09, 2015
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