region now outlooked for Wednesday

by

the SPC is jumping on the train I started a few days ago indicating there is a risk for severe weather wednesday.

Day 4-8 Convective Outlook Graphics Issued on Mar 19, 2011

SPC:  AS A VIGOROUS UPPER IMPULSE EMERGING FROM THE INTERMOUNTAIN WEST
   TURNS EASTWARD TO THE SOUTH OF A BLOCKING CENTRAL CANADIAN
   RIDGE…STRONG MID-LEVEL HEIGHT FALLS APPEAR LIKELY TO OVERSPREAD
   THE WARM SECTOR OF A DEEP CYCLONE MIGRATING ACROSS THE MID MISSOURI
   VALLEY ON TUESDAY.  ALTHOUGH CONCERN STILL EXISTS OVER THE LIKELY
   MARGINAL NATURE OF THE BOUNDARY LAYER MOISTURE RETURN…WHICH MAY
   SUPPRESS THE CONVECTIVE POTENTIAL…A REGIONAL AREA OF SEVERE STORMS
   STILL SEEMS PROBABLE GIVEN THE ANTICIPATED STRENGTH OF THE DYNAMIC
   FORCING FOR UPWARD VERTICAL MOTION AND VERTICAL SHEAR.  THIS THREAT
   SHOULD CONTINUE ACROSS THE LOWER OHIO AND TENNESSEE VALLEYS ON
   WEDNESDAY…AS STRONGER FORCING TURNS SOUTHEASTWARD ON THE SOUTHERN
   FRINGE OF AN AMPLIFYING TROUGH/DEVELOPING CLOSED LOW OVER
   SOUTHEASTERN CANADA AND THE NORTHEAST.  THEREAFTER…THE SPREAD
   GROWS CONSIDERABLY AMONG MEDIUM RANGE MODELS CONCERNING SHORT WAVE
   DEVELOPMENTS WITHIN THE PERSISTENT BLOCKING PATTERN…AND THE RISK
   FOR SEVERE STORMS BECOMES MORE UNCLEAR.

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