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MESOSCALE DISCUSSION 0364
NWS STORM PREDICTION CENTER NORMAN OK
0120 AM CDT SAT APR 24 2010
AREAS AFFECTED...NERN TX THROUGH NRN LA AND SWRN AR
CONCERNING...TORNADO WATCH 82...
VALID 240620Z - 240645Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 82 CONTINUES.
TORNADO WATCH 82 WILL BE REPLACED SOON BY ANOTHER TORNADO WATCH THAT
WILL EXTEND THROUGH NERN TX...SWRN AR AND NRN LA.
LINE OF STORMS OVER NERN TX IS EXPECTED TO CONTINUE EWD THROUGH
MODERATELY UNSTABLE ATMOSPHERE. RECENT OBJECTIVE ANALYSIS INDICATES
THE ATMOSPHERE REMAINS CAPPED FROM NERN TX TROUGH NRN LA.
HOWEVER...RADAR DATA INDICATE THE LINE IS ORGANIZED WITH ROTATING
COMMA HEAD AND IS EMBEDDED WITHIN STRONG VERTICAL SHEAR. STRONG
CONVERGENCE ALONG THE CONVECTIVE OUTFLOW BOUNDARY WILL LIKELY
MAINTAIN THIS ACTIVITY AS IT DEVELOPS EAST.
POTENTIAL WILL EXIST FOR
THE CAP TO WEAKEN WITHIN THE DEVELOPING WARM ADVECTION REGIME AND AS
HEIGHTS FALL DOWNSTREAM FROM ADVANCING UPPER TROUGH. THIS COULD
SUPPORT MORE DISCRETE STORMS MAY DEVELOPING EAST OF THE LINE LATER
THIS MORNING.