MESOSCALE DISCUSSION 0760
   NWS STORM PREDICTION CENTER NORMAN OK
   0344 AM CDT WED MAY 09 2007
   
   AREAS AFFECTED...WI...MI
   
   CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY 
   
   VALID 090844Z - 091115Z
   
   TSTMS ARE EXPECTED TO INCREASE ACROSS PARTS OF WI AND MI THIS
   MORNING WITH A FEW STRONG TO ISOLATED SEVERE STORMS CAPABLE OF
   PRODUCING HAIL. THREAT SHOULD GENERALLY BE CONFINED TO MARGINALLY
   SEVERE HAIL. A WATCH IS NOT ANTICIPATED.
   
   A COMPACT MID/UPPER LEVEL IMPULSE HAS EVOLVED FROM THE LARGER SCALE
   POSITIVE-TILT TROUGH AXIS ACROSS THE CNTRL U.S. THIS FEATURE APPEARS
   TO BE ACCELERATING EWD AND STRENGTHENING ACROSS THE UPPER MS VALLEY
   THIS MORNING. STEEPENING MID-LEVEL LAPSE RATES AND DPVA...COUPLED
   WITH MOIST LOW LEVEL AIR MASS...WERE CONTRIBUTING TO AN INCREASE IN
   TSTM COVERAGE FROM WI EWD ACROSS MI OVER THE PAST FEW HOURS. THERE
   MAY EXIST A LIMITED/NARROW CORRIDOR WHERE ELEVATED INSTABILITY AND
   STRONG FORCING AND SHEAR WITHIN THE ERN QUADRANT OF THE SHORT WAVE
   TROUGH COULD SUPPORT A COUPLE OF MARGINALLY SEVERE STORMS. STRONGER
   UPDRAFTS COULD PRODUCE HAIL AND A VARIETY OF SPC HAIL GUIDANCE WAS
   SUGGESTING HAILSTONE DIAMETERS SHOULD REMAIN AOB 1 INCH IN DIAMETER.
   A WATCH DOES NOT APPEAR LIKELY AT THIS TIME.
   
   ..CARBIN.. 05/09/2007
   
   
   ATTN...WFO...APX...MQT...GRB...MKX...DLH...ARX...MPX...
   
   43359034 44399133 44969210 46288977 46548711 46128501
   44858533 44198641 43768728