This is from John DeBlock - National Weather Service Warning Coordination Meteorologist
Effective immediately, the following changes have been made on an experimental basis through the end of the year: 1. Anniston/Mt. Cheaha, KIH-58, 162.475 MHz Counties warned: ADDING Jefferson, Shelby, and Coosa counties. Jefferson County was added based on feedback regarding a "hole" in the Birmingham transmitter's coverage in the Trussville/Clay area, and reports from reliable sources that the KIH-58 signal is strong in some of those areas.
The addition of Jefferson and Shelby counties will also provide NWR listeners in western St. Clair and Talladega counties the option for additional "heads up" warning time for hazardous weather approaching from the west. Coosa County was added based on the projected coverage area of KIH-58 providing improved coverage for NWR listeners in northeastern Coosa County, which will also provide additional "heads up" warning for listeners in Clay and Tallapoosa counties.
2. Oneonta, WNG-606, 162.425 MHz Counties warned: ADDING Jefferson, Walker, and Cullman counties. It is important to note that for the Oneonta transmitter, these counties were added primarily to provide additional "heads up" warning time to listeners by having the option to be warned for hazardous weather approaching the listening area from the west. In nearly all circumstances, NWR listeners in Jefferson, Walker, and Cullman counties should NOT change to listen to the Oneonta transmitter for their warnings.