Office of Emergency Management, Public Safety
Outdoor Warning System
Outdoor Warning System (OWS)
The Longmont Outdoor Emergency Warning System is tested on the first Monday of each month at 10am, April through August.
- The siren horns do not rotate. They have eight 400 watt speakers per siren that will provide 3200 watts of audio power. The horns are true re-entrant, directional and exponential speaker horns that can be tilted or directed as needed. These “omni-directional” sirens will change the way sound is delivered. The sound does not get louder and softer but remains constant.
- If you are in an area you cannot hear the sirens while outside your home or business, we are interested in hearing from you. There are some adjustments that can be made that may increase coverage in your area. Please email the Office of Emergency Management.
- Locations of Outdoor Emergency System Poles (and pole #): NW corner of 9th and Pace (5), NW corner or Hover and Nelson (7), 21st and Daley Drive (8), SW corner of Hwy 66 and Main (9), south of Hwy 66 between Pace and Sundance (10), NW corner of 17th and Harvard (11), 17th and Main (LEU parking lot) (12), Fordham and Pike (13), west of 9th and Wade north of RR tracks (14), 3rd and Sunset at water tower (15), 6th and Main Street east side of Pumphouse (16), Hwy 119 and WCR 5 (17), 75th Street south of Nelson (18), Pratt and Main (19), Ken Pratt and 119th Street (20), Airport Road and Nelson (21), Pike Road and South Main Street (22).
Here are a few things we would like to remind our community about:
- Please DO NOT call 911 during a test of the OEWS unless you have a true emergency. It is imperative that 911 lines remain open and allow us to respond to life-threatening situations.
- The City of Longmont will utilize the OEWS for tornados threatening to Longmont. We will not utilize the OEWS for flooding. The City of Boulder and Boulder County DO use their sirens for flooding, but it is our philosophy at Longmont OEM that sirens are utilized for a single purpose. As a reminder, when you hear the sirens and it is not the first Monday of the month at 10:00, go immediately inside and tune to local media for updates.
- Please take a minute to sign up for the Reverse 9-1-1 for mobile devices system. This is a notification tool that allows the city to contact you via email as well on other mobile devices during an emergency. For additional information, details and sign-up information for mobile devices, please visit our webpage.
The OEWS can be activated as a whole system, or any part of the system. This could be used to target a specific portion of the city. It also has a public address capability that can be used.
The city has the ability to broadcast on the city cable network (Channels 8 and 16). These combine to give the city a robust emergency warning system that will allow us to contact as many people as possible.
The city also has an email based subscription called e-alert. Although this system is not intended for emergency notification, city personnel can use it to send email messages directly to subscribers with late-breaking updates on issues such as West Nile virus, traffic street closures, city council news and several other categories. For more information on e-alert
more information about emergency preparedness in Longmont, please call the City of Longmont, Office of Emergency Management at (303) 651-8433 or contact us by email.