County officials say they successfully tested a lahar warning siren in Sumner today one week after 17 sirens failed to sound during a system-wide test.
The Sumner siren emitted a minute-long wail at 10 a.m. Tuesday as planned, according to a county press release.
The siren system is designed to warn residents in Sumner, Puyallup, Fife, Orting, McMillin, Alderton and Riverside of an impending volcanic mudslide, or lahar, on its way from Mt. Rainier.
County officials upgraded the siren system last year using a $300,000 state grant. But none of the upgraded sirens went off during a test May 4.
Technicians said the failed test was the result of a corrupt audio file. Once the audio file was swapped, the system worked, they said.