Posted by JAC on 3/8/2009, 10:54 am, in reply to "Tornado Watch"

VALID 081426Z - 081530Z THE SEVERE WEATHER THREAT FOR TORNADO WATCH 48 CONTINUES. BROKEN LINE OF STORMS WITH A FEW DISCRETE SUPERCELLS IS MOVING EAST AT AROUND 45 KT. STORMS WILL APPROACH THE SERN PORTION OF WW 48 BY AROUND 1530Z. OTHER STORMS HAVE INTENSIFIED OVER SRN MO SOUTH OF WW 48. ONE POSSIBLE OPTION WILL BE FOR LSX AND SGF TO LOCALLY EXTEND WW AHEAD OF THE LINE. OTHERWISE...A NEW WW WILL LIKELY BE NEEDED BY 15Z-16Z FOR THE REMAINDER OF ERN AND SERN MO THROUGH SRN AND CNTRL IL. DRY SLOT EXPANDING ENEWD AND MIXING OUT OF LOW CLOUDS WILL ALLOW THE BOUNDARY LAYER TO DESTABILIZE AHEAD OF CONVECTIVE LINE INTO IL. HOWEVER...INSTABILITY WILL REMAIN SOMEWHAT MARGINAL DUE MODEST LOW LEVEL MOISTURE AND WIDESPREAD CLOUDS. VERY STRONG VERTICAL SHEAR PROFILES AND LARGE 0-1 KM HODOGRAPHS ASSOCIATED WITH STRONG LOW LEVEL AND MID LEVEL JETS ATTENDING NEGATIVELY TILTED EJECTING SHORTWAVE TROUGH WILL MAINTAIN POTENTIAL FOR A FEW TORNADOES WITH ANY EMBEDDED SUPERCELL STRUCTURES. DAMAGING WIND IS ALSO LIKELY AS THE LINE CONTINUES EAST. ..DIAL.. 03/08/2009