The radios power the alarm to sound on the siren.
The new system will meet new narrowband regulations of the Federal Communications Commissions.
Changes have to be done before January of next year.
Narrowband will make it a quicker and more efficient way to warn people of a storm.
"The council approved the $7,000 expense and it's coming out of the general revenue," says Don Melton, Emergency Manager.
After that upgrade, crews will replace all five sirens. Current sirens date back to 1976.