With the weather forecast calling for a stormy weekend, residents and visitors may have questions about the sirens produced by Deerfield Park District’s Thorguard Lightning Prediction system.
If atmospheric conditions are right for lightning to develop, the Thorguard system’s horns and lights will activate, indicating that individuals should seek shelter.
One long horn blast indicates that there is a strong risk of lightning, while three short horn blasts signal that the threat has passed.
The system is tested at 10 a.m. on the first Tuesday of each month through November. For more information, contact the Deerfield Park District at 847.945.0650.