SPC MD 1277

MD 1277 CONCERNING SEVERE THUNDERSTORM WATCH 378…379…380… FOR EASTERN TX PANHANDLE AND NORTHERN/CENTRAL OK TO EASTERN KS/FAR WESTERN MO


MESOSCALE DISCUSSION 1277
NWS STORM PREDICTION CENTER NORMAN OK
0859 PM CDT THU JUN 27 2013

AREAS AFFECTED...EASTERN TX PANHANDLE AND NORTHERN/CENTRAL OK TO
EASTERN KS/FAR WESTERN MO

CONCERNING...SEVERE THUNDERSTORM WATCH 378...379...380...

VALID 280159Z - 280330Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH
378...379...380...CONTINUES.

SUMMARY...SEVERE WINDS REMAIN POSSIBLE WITH ONGOING STORMS/LEADING
OUTFLOW ESPECIALLY ACROSS NORTH-CENTRAL/NORTHEAST OK INTO PORTIONS
OF CENTRAL OK THIS EVENING. MEANWHILE...LARGE HAIL REMAINS POSSIBLE
ACROSS NORTHEAST KS ALTHOUGH DAMAGING WINDS MAY BECOME MORE OF A
CONCERN THROUGH 03Z /AND POTENTIALLY BEYOND/ ACROSS EASTERN KS/FAR
WESTERN MO.

SEVERE TSTM WATCHES 378/379 CONTINUE UNTIL 03Z...WHILE SEVERE TSTM
WATCH 380 CONTINUES UNTIL 05Z. A SPATIAL EXTENSION OF WATCHES
379/380 MAY BE WARRANTED ACROSS OK...AND/OR A TEMPORAL
EXTENSION/REPLACEMENT WATCH COULD BE NEEDED FOR EASTERN KS AND
PERHAPS FAR WESTERN MO BEYOND 03Z.

DISCUSSION...AS OF 0145Z...A SEVERE MCS/LEADING OUTFLOW CONTINUES TO
STEADILY PROGRESS SOUTH-SOUTHEASTWARD ACROSS THE NORTHERN THIRD OF
OK AND ADJACENT PARTS OF THE NORTHERN TX PANHANDLE. DAMAGING WINDS
WILL REMAIN POSSIBLE...PERHAPS INTO CENTRAL OK...OVER THE NEXT
SEVERAL HOURS. RECENT SEVERE-CALIBER MEASURED GUSTS INCLUDE 58 KT AT
REDROCK OK AND PAWNEE OK. THAT SAID...THE INTEGRITY OF THE
CONVECTIVE LINE HAS BEGUN TO DIMINISH...SUCH THAT THE
INTENSITY/EXTENSIVENESS OF THE SEVERE GUSTS SHOULD CONTINUE TO TREND
DOWNWARD AS THE BOUNDARY LAYER...WHILE STILL RELATIVELY
WARM/UNSTABLE...GRADUALLY COOLS.

MEANWHILE...A VERY PERSISTENT CLUSTER OF STORMS ATOP PRIOR OUTFLOW
ACROSS NORTHEAST KS CONTINUES TO EXPAND IN COVERAGE AND GROW
UPSCALE. LARGE HAIL WILL REMAIN POSSIBLE IN THE SHORT TERM AND/OR ON
THE PERIPHERY OF THE EVOLVING CLUSTER...BUT DAMAGING WINDS...AT
LEAST ON AN ISOLATED BASIS...SHOULD BECOME MORE OF A CONCERN AS
FORWARD PROPAGATION ENSUES INTO A RELATIVELY UNSTABLE/UNPERTURBED
AIRMASS TO ITS SOUTH-SOUTHEAST. ALONG THESE LINES...A 60 KT GUST WAS
RECENTLY MEASURED AT FORT RILEY KS. A TEMPORAL WATCH EXTENSION
BEYOND 03Z OR A REPLACEMENT WATCH MAY BE NEEDED WITHIN THE HOUR FOR
EASTERN KS AND PERHAPS PARTS OF FAR WESTERN MO.

..GUYER.. 06/28/2013

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

ATTN...WFO...SGF...EAX...TSA...TOP...ICT...OUN...AMA...

LAT...LON   36000083 35939958 36269871 36299755 36919648 37789670
            38809759 39479680 38159409 37119455 36659535 35229572
            35009971 36000083

via SPC Forecast Products http://www.spc.noaa.gov/products/md/md1277.html