Sporadic US East Coast ALE activity is being reported on the US Federal interagency National Public Health Radio Network (NPHRN). So far nothing has been heard in the West.
Participants include Centers for Disease Control (CDC), Federal Emergency Management Agency (FEMA), possibly US Dept. of Agriculture (USDA), and many state and local public health departments.
Frequencies are 4442.0, 4757.0 (possible), 4780.0 (possible), 8023.0, 9414.5, 10202.0, 12164.0, and 13488.0 kHz USB.