A Severe Thunderstorm Watch issued about 9:15 a.m. Sunday with no expiration given at this time. Radar indicates thunderstorms developing, just west of the northwest suburbs. The storms should be passing through Palatine, Arlington Heights, Buffalo Grove and Elk Grove by 9:30 a.m. Sunday.
The Severe Thunderstorm Watch was apparently not an official National Weather Service statement, but an internal watch for public safety officials on the communication system with Northwest Central Dispatch. As of Sunday at 11:15 a.m. all thunderstorms visible on radar are east of the Illinois-Indiana border and heading east.
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