Tornado spotted in Johnson County, but not all residents were alerted — here’s why

Staff meteorologist Chris Bowman said tornado warnings and other weather-related alerts can be issued countywide, but in this instance, the warnings were targeted for areas in the county’s southeast corner, around Spring Hill, southern Olathe, Stanley, Overland Park and Leawood. He said that was due to how the storm was moving and what areas the NWS determined would be most impacted. “We draw a polygon around what we feel is the area under greatest threat,” Bowman said.
Source: Prairie Village Post