A Severe Thunderstorm Watch that was in effect until 11:30-a.m., for Monona, Harrison, Pottawattamie and Shelby Counties, was cancelled at 11:15-a.m. There were no reports of damage.  A SEVERE THUNDERSTORM WATCH remains in effect for the far southwest corner counties of Iowa, until 3:00-p.m. (Mills, Montgomery, Fremont and Page Counties).