Monday, March 21 begins Iowa’s Serve Weather Awareness Week. Jasper County Communications will be participating in the statewide tornado drill this Wednesday, March 23rd, 2022. Siren activation for Sully will begin at 10:00 a.m. and run approximately 1 minute which is the normal duration of time in the event of an emergency. 

As a reminder the systems activated by Jasper County Communications are designed to provide notification to persons outdoors. Siren testing is done the first Wednesday of the month at 10:00 am unless there are weather conditions that may appear to look as severe weather in the area. The following are guidelines for activation of warning sirens by Jasper County Communications:

  • A tornado warning is issued by the National Weather Service
  • A tornado or funnel cloud reported by a trained spotter or public safety official
  • Multiple 911 calls are received suggesting confirmation of a tornado
  • Winds exceeding 72 MPH are imminent or occurring
  • Strong winds accompanied by hail capable of producing serious injury
  • National Weather Service confirmed or imminent golf ball size hail [1-3/4”] or larger. Hail of this size will typically break windows and can cause significant bodily injury

There will not be an “all clear” activation of the outdoor sirens following a live emergency activation. Persons should monitor sources such as NOAA All-Hazard Radios or local media.

Jasper County community members are encouraged to sign up at the following website for weather related notifications at