Communications Announcement Purdue University – Physical Facilities Purdue University will conduct a "growl test" of the all-hazards outdoor warning siren at Purdue Village at 10 a.m. on Monday, October 10. The test will activate the siren for 1-2 seconds and may be noticeable on campus. However, the potential for full siren activation is possible. If the siren activates during the test, please disregard, and no action is necessary. Purdue is in the process of replacing its all-hazards sirens over the next few weeks, and once a siren is replaced a “growl test” is required to ensure its operation capability.