Outdoor Warning System

The Pella Outdoor Warning System (OWS) is an outdoor, all-hazards siren system that is used to warn the citizens of Pella of potential danger in a short amount of time. The system is designed to provide coverage to persons outdoors, not inside buildings or structures. 

What Do the Sirens Sound Like?

Click this link to hear what our sirens sound like.

What Do the Sirens Mean? 

• The OWS will be activated upon receipt of a tornado warning issued by the National Weather Service (NWS) in which Pella is included in the warning polygon.
• Severe Thunderstorm Warnings where forecasted or actual wind speeds reach or exceed 70mph.
• Golf ball or larger sized hail.
• Sirens will sound in a cycle of 3 minutes, followed by a 10-15 minute break for the duration of the threat (warning period).
• Please note there will no longer be an “all clear” signal. Citizens should be indoors and monitoring local media or NOAA All-Hazards Radio for updates on the storm. 

Siren Test 

The City of Pella will perform a monthly siren test to ensure all sirens are functioning. The entire system is tested at noon on the first Saturday of each month unless severe weather is imminent.

What Should I Do if I Hear the Sirens? 

Confusion hinders public response; therefore, there will no longer be an audible fire siren in Pella. If sirens are activated – and it is not a monthly test – the public should see it as a signal to:

• Seek shelter
• Tune into radio or television to get information about:
  • Type of Emergency
  • Instructions & Recommendations

The public should not call 9-1-1 unless they have an actual emergency.

For More Information

View our Frequently Asked Questions (PDF) for more information