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Jasper County EMA urges standardized siren thresholds; Prairie City reviews new solar voice-capable sirens
Summary
Jasper County Emergency Management Agency recommended countywide siren activation thresholds and presented a plan to relocate and add two solar, voice-capable sirens for Prairie City, noting current siren placement near Coop silos hinders sound travel; council took no formal action and asked staff to review funding.
Jasper County Emergency Management Agency Director Jamey Robinson told the Prairie City City Council on July 10 that the National Weather Service supplies Wireless Emergency Alert (WEA) criteria for phone alerts but does not mandate siren activation thresholds. Robinson said the county currently activates sirens at lower thresholds (70 mph winds and 1.75-inch hail) than the WEA guidance (80 mph wind, 2.75-inch hail) and asked that municipalities adopt a common Jasper County standard to ensure consistent public notification.
Robinson emphasized that outdoor sirens are intended only for outdoor notification and are not engineered to alert residents indoors. He also presented a vendor proposal and map recommending two new solar, voice-capable sirens sited to improve coverage; Robinson said the town’s existing siren, positioned near the Coop silos, blocks sound travel and reduces effectiveness. Councilmember Emily Simmons asked staff to investigate available funds to support the siren evaluation and potential replacement. No formal action or contract award was taken at this meeting.
The council’s discussion focused on improving outdoor warning coverage and the logistics and expense of relocating or adding devices. Robinson said he has previously worked with the vendor named in the packet materials, but he did not present a formal procurement contract at the meeting.
