At 100 PM CDT on 28 June, most warnings for critical meteorological phenomena will generate wireless emergency alerts (WEA) on telephones equipped with firmware to accommodate the WEA functionality. Only a few late model telephones will respond to WEA issuance. The following events in the central plains will trigger WEA messages:
Flash Flood Warnings
Ice Storm Warnings
Dust Storm Warnings.
Additonal information about the WEA program is available here.