SWOMCD
SPC MCD 271023
OKZ000-271130-
MESOSCALE DISCUSSION 1056
NWS STORM PREDICTION CENTER NORMAN OK
0523 AM CDT TUE MAY 27 2008
AREAS AFFECTED...CNTRL AND SERN OK
CONCERNING...SEVERE THUNDERSTORM WATCH 377...
VALID 271023Z - 271130Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 377
CONTINUES.
WW 377 WILL BE ALLOWED TO EXPIRE AT 11Z. THE STRONGER STORMS ARE
SHIFTING SE OF REMAINING PORTION OF THE WW. WHILE SOME THREAT FOR
STRONG WIND GUSTS AND MARGINALLY SEVERE HAIL PERSISTS...OVERALL
THREAT APPEARS TOO MARGINAL TO WARRANT ANOTHER WW.
STORMS CONTINUE DEVELOPING ALONG A SEWD ADVANCING OUTFLOW BOUNDARY
THAT EXTENDS FROM S CNTRL MO SWWD INTO ERN OK WHERE IT INTERSECTS
ANOTHER LINE THAT EXTENDS FROM A ROTATING COMMA HEAD NEAR TULSA SWWD
TO NORTH OF ARDMORE. THE LINE MOVING THROUGH ERN OK MAINTAINS A
BROAD BOW STRUCTURE. A THREAT OF ISOLATED STRONG WIND GUSTS STILL
EXISTS ALONG THE LEADING GUST FRONT. HOWEVER...THIS LINE HAS LOST
SOME OF ITS ORGANIZATION AND RECENT OBSERVATIONS SHOW ATTENDANT WIND
GUSTS BELOW SEVERE CRITERIA. OTHER STORMS ARE BACKBUILDING ACROSS S
CNTRL OK IN A ZONE OF ENHANCED LIFT WHERE THE LOW LEVEL JET
INTERSECTS THE TRAILING GUST FRONT. THE LEADING PORTION OF LINE WILL
LIKELY CONTINUE FORWARD PROPAGATING SEWD WHERE THE DOWNSTREAM
ATMOSPHERE IS MARGINALLY TO MODERATELY UNSTABLE. HOWEVER...ACTIVITY
HAS BECOME REMOVED FROM THE STRONGER FLOW ALOFT...AND THIS ALONG
WITH A STABLE BOUNDARY LAYER SUGGEST OVERALL SEVERE THREAT SHOULD
REMAIN MARGINAL.
..DIAL.. 05/27/2008
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...SHV...TSA...OUN...
34319635 34579581 34819549 35109522 35029458 34769451
34429483 34169550 34109624
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