Saturday/Early Evening 2

There's also another Mesoscale discussion for Central Illinois. If a watch is issued, it may include Western and potentially Southern Indiana.



SPC says: BECOMING INCREASINGLY CONCERNED ABOUT CU FIELD EXPANSION ALONG ADVANCING COLD FRONT AS IT PROGRESSES SEWD INTO IL. ALTHOUGH FLOW HAS VEERED CONSIDERABLY IN THE WAKE OF EARLIER SHORTWAVE TROUGH...IT APPEARS SUFFICIENT LOW LEVEL CONVERGENCE WILL BE AVAILABLE...GIVEN VERY STEEP LAPSE RATE ENVIRONMENT...FOR THUNDERSTORM INITIATION WITHIN THE NEXT FEW HOURS. LATEST DIAGNOSTIC DATA ALSO SUGGESTS PW VALUES ARE HOLDING ABOVE ONE INCH ACROSS THE SRN HALF OF IL WHICH DESPITE VEERING/DRYING BOUNDARY LAYER SHOULD SUPPORT ROBUST CONVECTIVE DEVELOPMENT CAPABLE OF GENERATING LARGE HAIL/DAMAGING WINDS. WW MAY BE REQUIRED ALONG NW-SE ORIENTED FASHION TO ACCOUNT FOR THIS INCREASED SEVERE RISK.