SEVERE THUNDERSTORM WATCH 201 IS IN EFFECT UNTIL 1000 PM CDT FOR THE FOLLOWING LOCATIONS . IOWA COUNTIES INCLUDED ARE: BUENA VISTA; CHEROKEE; CLAY; DICKINSON; HARRISON; IDA; LYON; MILLS; MONONA; O`BRIEN; OSCEOLA; PLYMOUTH; POTTAWATTAMIE; SHELBY; SIOUX and WOODBURY.