We apologize for any inconvenience; at this time the Isabella County Administration Building is closed for asbestos abatement activities. For office locations and phone numbers click here for more information..

Early Warning Sirens

2008 E. Preston St.
Mt. Pleasant, MI 48858
Phone:(989) 773-6116
Fax:(888) 384-5668

Early Warning Information

Isabella County has 29 outdoor warning sirens located throughout the county. The purpose of these sirens is to warn the public of impending disasters or emergencies. The sirens will be activated immediately to warn the public of an emergency situation. These sirens notify the public to go inside and turn on the radio or television for further information.

All Isabella County Outdoor Warning Sirens are tested the 1st Thursday of every month at 3:00 pm.

emergency siren

Early Warning Tones

The outdoor warning system utilizes two distinctively different siren signals.

When testing the sirens each month, we first sound the seek shelter signal, then the all clear signal.

Please remember: Do not telephone 911 or local agencies: it’s important to leave telephone lines open for emergency communication.

Seek Shelter Signal

The “Seek Shelter Signal”is a siren that slowly increases to a steady sound lasting 3 to 5 minutes.

All Clear Signal

The “All Clear Signal”is an intermittent air horn sound, also lasting 3 to 5 minutes.

Steps to follow when you hear a siren

  • Immediately turn on your NOAA weather radio if it hasn’t already been activated.
  • Immediately tune to a local radio station or the local cable television station.
  • Listen for emergency messages.
  • Follow instructions.
  • Stay tuned for further updates.
car radio
Isabella County Building

Emergency Alert Radio 1610 AM

Isabella County’s Low frequency AM radio broadcast station is designed to keep area residents and visitors informed of local emergencies including weather, traffic backups, street closures, and civil emergencies.

Residents and visitors can tune to AM 1610 on their radio dial to keep informed of needed emergency information anytime day or night.

The broadcast antenna is located on top of the Isabella County Building in downtown Mt. Pleasant. Its broadcasting range is within approximately 4 mile radius.