County of Hall recently issued the following announcement.
UPDATE: Due to inclement weather, the siren test scheduled for May 4 has been postponed. A new date will be announced once it is finalized.
ORIGINAL RELEASE:
The audible test of Hall County's severe weather warning system will sound at 11 a.m. Wednesday, May 4. This will only be a test. The sirens will sound for approximately three minutes.
The tornado sirens are tested using the wail alert tone once every three months. Other than these previously announced tests, all sirens should be considered to be an actual tornado warning. The upcoming test will be canceled in the event of a legitimate severe weather threat.
"We all know that severe weather can strike quickly, especially during our hot, humid summers," said Casey Ramsey, Director of Hall County Emergency Management. "By taking steps to prepare before it strikes, you can ensure that you and your family stay safe. I encourage all Hall County residents to sign up for our Citizen’s Alert System in order to receive potentially life-saving notifications about severe weather in a timely fashion."
Original source can be found here.