Severe Storm Outlook Narrative (AC)
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711
ACUS11 KWNS 162042
SWOMCD
SPC MCD 162041
OKZ000-TXZ000-162215-

MESOSCALE DISCUSSION 0666
NWS STORM PREDICTION CENTER NORMAN OK
0341 PM CDT SAT MAY 16 2015

AREAS AFFECTED...CNTRL/ERN TX/OK PANHANDLES...FAR NW AND N
TX...WRN/CNTRL OK

CONCERNING...TORNADO WATCH 175...

VALID 162041Z - 162215Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 175 CONTINUES.

SUMMARY...A BROKEN LINE OF INTENSE TSTMS IS PROGRESSING NEWD ACROSS
THE ERN TX PANHANDLE AND NW TX. THE DOWNSHEAR ENVIRONMENT ACROSS OK
IS BECOMING INCREASINGLY FAVORABLE FOR TORNADO POTENTIAL /POSSIBLY
STRONG/. A NEW TORNADO WILL BE ISSUED SOON FOR WRN/CNTRL OK AND
POSSIBLY PARTS OF NORTH TX.

DISCUSSION...A BROKEN LINE OF INTENSE TSTMS WITH A FEW EMBEDDED
SUPERCELLS CONTINUES TO MOVE NEWD ACROSS THE ERN TX PANHANDLE AND
THE ROLLING PLAINS OF NWRN TX...WITH REPORTS RECEIVED RECENTLY OF
LARGE HAIL AND A COUPLE TORNADOES. ADDITIONAL TSTMS ARE DEVELOPING
FARTHER W WITHIN TORNADO WATCH 175...BUT WITH VEERED LOW-LEVEL WINDS
AND A DRIER BOUNDARY-LAYER...LARGE HAIL AND DMGG WINDS WILL BE THE
PRIMARY THREATS.

THE ENVIRONMENT ACROSS WRN/CNTRL OK IS ONLY MARGINALLY TO MODERATELY
UNSTABLE /PER 18Z OUN AND LMN SOUNDINGS/...AND STILL CAPPED WITH A
WARM LAYER NOTED NEAR 1.5 KM AGL. EXTENSIVE CLOUD COVER HAS ALSO
LIMITED DIABATIC HEATING ACROSS CNTRL OK...WITH TEMPERATURES
REMAINING IN THE LOW-MID 70S. DESPITE THESE POTENTIAL LIMITING
FACTORS...LOW-LEVEL SHEAR WILL CONTINUE TO INCREASE INTO THE
EVENING...AND WILL FAVOR THE RISK FOR TORNADOES /SOME POTENTIALLY
STRONG/ ACCOMPANYING DISCRETE SUPERCELLS ACROSS WRN/CNTRL OK AND
POSSIBLY INTO PORTIONS OF N TX. AS A RESULT...A NEW TORNADO WATCH
WILL BE ISSUED SOON.

..ROGERS/DIAL.. 05/16/2015

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

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

LAT...LON   36479946 36769859 36859733 36539660 34939576 33469628
            33449938 33660075 36020212 36540157 36479946




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