Severe Storm Outlook Narrative (AC)
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000
ACUS11 KWNS 252215
SWOMCD
SPC MCD 252215
ARZ000-LAZ000-TXZ000-OKZ000-252345-

MESOSCALE DISCUSSION 0770
NWS STORM PREDICTION CENTER NORMAN OK
0515 PM CDT MON MAY 25 2015

AREAS AFFECTED...EASTERN OK AND NORTHEAST/EAST-CENTRAL TX TO
WESTERN/CENTRAL AR AND NORTHERN LA

CONCERNING...TORNADO WATCH 212...

VALID 252215Z - 252345Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 212 CONTINUES.

SUMMARY...A SQUALL LINE WILL LIKELY CONTINUE TO ACCELERATE
EAST-NORTHEASTWARD FROM EASTERN OK AND NORTHEAST/EAST-CENTRAL TX
INTO AR/NORTHERN LA THROUGH EARLY/MID-EVENING. POTENTIALLY
WIDESPREAD DAMAGING WINDS AND A TORNADO RISK WILL REMAIN CONCERNS
WITHIN THIS CORRIDOR.

A NEW TORNADO WATCH WILL LIKELY BE NEEDED SOON ESPECIALLY FOR
WESTERN/CENTRAL AR AND NORTHERN LA. TORNADO WATCH 212 CONTINUES
UNTIL 03Z.

DISCUSSION...A HIGHLY ORGANIZED SQUALL LINE WITH EMBEDDED
LEWPS/CIRCULATIONS  CONTINUES TO GRADUALLY ACCELERATE
EAST-NORTHEASTWARD ACROSS FAR EAST-CENTRAL/SOUTHEAST OK AND
NORTHEAST/EAST-CENTRAL TX AS OF 5PM CDT/22Z. POTENTIALLY WIDESPREAD
DAMAGING WINDS WILL REMAIN A PREVALENT CONCERN. TORNADOES WILL ALSO
REMAIN POSSIBLE WITH LINE-EMBEDDED MESOVORTICES AND SEMI-DISCRETE
SUPERCELLS IMMEDIATELY AHEAD OF THE CONVECTIVE LINE. THIS SHOULD
ESPECIALLY BE THE CASE ACROSS FAR EAST-CENTRAL/SOUTHEAST OK AND FAR
NORTHEAST TX INTO WESTERN/CENTRAL AR...PARTICULARLY NEAR AN
INFLECTION IN THE LINE NEARING THE OK AND AR BORDER VICINITY /AT
22Z/ COINCIDENT WHERE SURFACE PRESSURE FALLS AND LOW-LEVEL
SOUTHEASTERLY WINDS ARE MAXIMIZED. IT SHOULD ALSO BE NOTED THAT WARM
SECTOR SHOWERS/THUNDERSTORMS CURRENTLY ONGOING WELL AHEAD OF THE
SQUALL LINE ACROSS NORTHERN LA INTO SOUTHWEST/SOUTH-CENTRAL AR MAY
INCREASINGLY ACQUIRE ROTATION AS LOW-LEVEL SOUTHERLY FLOW
INCREASES...SUCH THAT AN INCREASING TORNADO RISK COULD OCCUR AHEAD
OF THE SQUALL LINE.

..GUYER.. 05/25/2015

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

ATTN...WFO...JAN...LZK...SHV...TSA...

LAT...LON   35349535 35679518 36289410 36299192 35309113 32409165
            31429302 31879526 33849508 35349535



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