Clark County PCA Implementation and Example

Clark County, NV, is one of the first counties to adopt Partial County Alerting. NWS Las Vegas requested the change because Clark County is one of the largest in the country with a heavy population density in Las Vegas and low population in other areas. Because NOAA Weather Radio (NWR) is county based, even if only a small part of a county is forecasted to be impacted by a storm, the entire county is alerted, resulting in over alerting. This over alerting strongly impacts large counties. The NWS has received complaints about receiving "too many EAS alerts" for a given county and "too many warnings which are not applicable to my area of the county." Similarly, broadcasters have expressed concerns about NWS requests for EAS activations for warnings that do not apply to their broadcast service area.