SPC MD 960

MD 0960 CONCERNING SEVERE THUNDERSTORM WATCH 276… FOR PORTIONS ERN CO…WRN/SRN KS…NWRN TO N-CENTRAL OK.


MESOSCALE DISCUSSION 0960
NWS STORM PREDICTION CENTER NORMAN OK
0918 PM CDT TUE JUN 04 2013

AREAS AFFECTED...PORTIONS ERN CO...WRN/SRN KS...NWRN TO N-CENTRAL
OK.

CONCERNING...SEVERE THUNDERSTORM WATCH 276...

VALID 050218Z - 050345Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 276
CONTINUES.

SUMMARY...IN ADDITION TO CONVECTION NOTED IN MESOSCALE DISCUSSION
959...ADDITIONAL TSTMS HAVE DEVELOPED RAPIDLY FARTHER E ACROSS WRN
KS.  THIS ACTIVITY WILL POSE THREAT OF SVR WIND AND OCNL HAIL AS IT
MOVES EWD TO SEWD WITH SOME ACCELERATION/BOWING POSSIBLE.  WITH
ACTIVITY POTENTIALLY OUT OF CURRENT WW AREA WITHIN NEXT 1-2
HOURS...ANOTHER WW IS LOOKING INCREASINGLY LIKELY.

DISCUSSION...NEWER CONVECTION HAS FORMED IN INCREASINGLY
WELL-ORGANIZED/MERIDIONAL BAND LOCATED FROM KEARNY-LOGAN COUNTIES KS
AS OF 215Z...STRADDLING FRONTAL SEGMENT THAT EXTENDS EWD THEN NEWD
OVER CENTRAL KS.  ACTIVITY MAY MERGE WITH PRE-EXISTING TSTM COMPLEX
FARTHER S THAT PRODUCED MEASURED 78-KT GUST AT SPD AT 103Z.
COLLECTIVE COLD POOL THEN MAY RESULT IN STG FORCED ASCENT OF
INCREASINGLY MOIST/HIGH-THETAE LOW-LEVEL AIR FOR MAINTAINING MCS
ACROSS PARTS OF SRN KS AND NWRN OK.  MLCAPE 2000-3000 J/KG SHOULD
DIMINISH ONLY SLOWLY OVER LATTER AREAS...GIVEN EXPECTED MOIST
ADVECTION OFFSET WITH SFC DEW POINTS MID 60S TO NEAR 70 F IN
UPSTREAM AIR MASS OVER OK.  STRENGTHENING SSELY/SELY LLJ WILL
FURTHER AID CONVECTIVE LIFT VIA ENHANCED HEADLONG COMPONENT OF
STORM-RELATIVE FLOW.

..EDWARDS.. 06/05/2013

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

ATTN...WFO...ICT...OUN...DDC...GLD...AMA...PUB...BOU...

LAT...LON   36860027 37040205 38330258 39560300 39680209 38629809
            35959823 35559973 36860027

via SPC Forecast Products http://www.spc.noaa.gov/products/md/md0960.html