Nashville OEM will Retest Select Tornado Sirens
Joseph Pleasant; Public Information Officer
Retest will address system errors discovered during monthly growl test.
The Nashville Office of
Emergency Management will do a second growl test on select tornado sirens in
the Tornado Warning System to address errors discovered during a scheduled
growl test on Monday, April 20, 2020.
OEM tests the tornado warning siren system twice a month if
the weather permits. There is a full test of the system on the first Saturday
of every month.
There is a second shorter growl test conducted on the third
Monday of each month. During this test the sirens will sound for 20 seconds or
The following sites will sound at 12 noon, Monday, April 20,
2020. These are the only sites where the growl test will happen.
- 03 Antioch Community Center, 5023 Blue Hole Road – Last
- 18 Ezell Road Park, 5135 Harding Place – Last Activation
Fail and Audio Current Fail
- 61 Two Rivers Park, 2320 Two Rivers Park – Last
- 88 Apollo Middle School, 630 Richards Road – Last
Background on Upgrading Tornado Warning System
office of Emergency Management is currently upgrading the all-call tornado
warning system to a polygonal warning system.
upgrade process OEM will continue to set off ALL Siren Sites throughout the
county for tornado warnings. After all existing sites are updated twenty (20)
new sirens will be added to the system to expand the coverage footprint into
more rural areas of Davidson County, bringing the total to 113 sirens that will
then go to the polygonal alert. This project is estimated to be totally
completed in early 2020.
weather will also play a role in the completion of the upgrades as it may be
delayed a few days depending on storms, snow, ice, etc.
Polygonal Alerting Tornado Siren System is estimated to cost $1.9 Million and
was funded by Metro Government in the current 4% budget.
Metro first installed
Weather Warning sirens in 2003. At that time, weather warnings issued by the
National Weather Service (NWS) were for an entire county. Weather forecasting
technology has improved significantly since 2003.
warnings are now issued to potentially impacted areas based on the observed
track and speed of the storms, without regard to political or geographic
polygonal alerts are defined by boxes drawn on a map and should be familiar to
everyone as the odd shapes shown on the radar screen during television weather
when complete, will make the siren system capable of Polygonal Alerting, and
will activate only the sirens located inside the warned area, instead of all
sirens county wide.
will be immediate, and sirens will activate mere seconds after a warning has
been issued by the NWS.