Lightning Detection System
It's that time of year that you may hear a horn or see a strobe light in our parks and school fields, indicating a detection of lightning in the area.  When lightning up to 10 miles away is detected, the signals will be activated.  The detector, located centrally in Demarest, will send a signal to remote devices located in all participating southern section municipalities, which consist of Demarest, Haworth and Closter.  The northern section municipalities consist of Old Tappan, Northvale, Norwood, and Harrington Park.  This system is made up of a solar panel, a detection box, sirens, speakers and a strobe light.
In Demarest, five fields have been outfitted with the emergency notification devices: Demarest Middle School, Luther Lee Emerson School, County Road School, Northern Valley Regional High School Demarest, and Wakelee fields.
When first activated, residents will hear three blasts of the siren and a strobe light will flash and continue to flash until no lightning is detected for 30 minutes.  The “all clear” signal to notify residents that it is safe to return to the fields or parks is a one-siren blast and the deactivation of the strobe lights. Until hearing the “all clear” signal, residents must go to their vehicles or a permanent structure for shelter.

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