SWOMCD
SPC MCD 122034
OKZ000-TXZ000-122200-
MESOSCALE DISCUSSION 0500
NWS STORM PREDICTION CENTER NORMAN OK
0334 PM CDT THU APR 12 2012
AREAS AFFECTED...NWRN TX THROUGH WRN OK
CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE
VALID 122034Z - 122200Z
SEVERE STORMS COULD DEVELOP FROM NWRN TX THROUGH WRN OK DURING NEXT
FEW HOURS. SUPERCELLS CAPABLE OF VERY LARGE HAIL AND ISOLATED
TORNADOES WILL BE THE MAIN THREATS.
THE ATMOSPHERE HAS DESTABILIZED IN MOIST AXIS EAST OF THE DRYLINE
FROM WRN TX NWD THROUGH WRN OK WITH MLCAPE TO 2000 J/KG AND 7.5 C/KM
MID LEVEL LAPSE RATES. A WEAK BOUNDARY WAS ALSO INDICATED FROM
N-CNTRL NWWD THROUGH NWRN TX ALONG THE OK/TX BORDER. NORTH OF THIS
FEATURE WINDS ARE BACKED ESELY RESULTING IN 200-250 M2/S2 EFFECTIVE
STORM RELATIVE HELICITY. LOW CLOUDS CONTINUE TO DIMINISH FROM THE
WEST WITHIN ZONE OF DEEPER MIXING ACROSS NWRN TX WHERE A FIELD OF
CUMULUS AND A FEW SHOWERS HAVE DEVELOPED. ISOLATED STORMS MAY
EVENTUALLY FORM WHERE THIS ZONE INTERSECTS THE BOUNDARY FROM NWRN TX
INTO SWRN OK. EFFECTIVE BULK SHEAR FROM 40-45 KT FAVORS
SUPERCELLS...AND 0-1 KM HODOGRAPH SIZE WILL INCREASE FURTHER AS THE
LOW LEVEL JET STRENGTHENS DURING THE EVENING.
..DIAL.. 04/12/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...OUN...LUB...AMA...
LAT...LON 33729922 34000014 35000038 36469965 36389880 34659820
33729922
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