Sonoma County Testing Alerts and Warning Systems – September 10 & 12

Posted on September 5, 2018

On September 10, 2018 and September 12, 2018 Sonoma County will test the alert and warning systems. You may receive a phone call, an alert on your mobile device, or experience interruptions in local radio and television.

What to Expect

>September 10, 2018: Phone Call – Around 6 PM, Sonoma County will call all SoCoAlert subscribers, and landlines. Sign up at

>September 12, 2018: Mobile Alert, Radio and Television Interruptions – Sonoma County will send Wireless Emergency Alerts between 10 AM and 12 noon, to:

  • Healdsburg
  • Guerneville
  • Roseland
  • Glen Ellen/Kenwood
  • Penngrove

The alert should display on all compatible mobile devices with a special tone and vibration, and a brief text notification.

Local radio and television will broadcast a test message using the Emergency Alert System around 12 noon.

Learn more at

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