Storm Prediction Center monitoring northern Illinois and the Chicago Metro area for possible severe weather

The Storm Prediction Center in Norman, Oklahoma is monitoring conditions across northern Illinois for possible severe thunderstorm development as a cold front approaches from Iowa. The peg the probability of the issuance of a watch at 40 percent.

 

 

  AREAS AFFECTED...NRN IL...SRN WI

   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE

   VALID 052102Z - 052230Z

   PROBABILITY OF WATCH ISSUANCE...40 PERCENT

   SUMMARY...A CONDITIONAL THREAT OF SUPERCELLS WITH LARGE HAIL AND
   DAMAGING WINDS EXISTS ACROSS FAR NRN IL AND SRN WI...AND THE AREA IS
   BEING MONITORED FOR POSSIBLE DEVELOPMENT.

   DISCUSSION...THE AIR MASS ACROSS THE REGION WAS AFFECTED BY EARLY
   DAY CONVECTION...BUT SOME RECOVERY HAS TAKEN PLACE. STREAMLINES ARE
   CONVERGING OVER THE AREA BUT SOME CAPPING EXISTS. THE SURFACE
   THETA-E AXIS REMAINS W OF THE AREA...BUT MORE BUOYANT AIR MAY
   EVENTUALLY MOVE IN SLOWLY FROM THE SW. IT IS UNCLEAR IF THE FORCING
   WILL OVERCOME CAPPING...BUT IF IT DOES...CONDITIONS WILL BE QUITE
   FAVORABLE FOR HAIL AND WIND.

 

 

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