Carbondale Non-Bargaining Unit Employees Personnel Board recently issued the following announcement.
Outdoor warning sirens are tested on the first Tuesday of each month at 10 a.m. During inclement weather, sirens will not be tested. If a siren is sounded other than during a scheduled test, this alarm indicates an actual emergency.
Remember, a watch means that conditions are favorable for severe weather to develop. While a warning means severe weather is occurring, and you should take shelter immediately.
Original source can be found here.