Lightning Prediction System

Our Lightning Prediction System in Gillette and Wright

Installed in the fall of 2018, our ThorGuard Lightning “Prediction” system lets all of us know in advance that conditions are building towards a lightning strike

The system includes hyperstatic sensors at six primary sites. They monitor electrical charges in the atmosphere within 15 miles of the sensor

It’s related warning equipment provides warning that the system is predicting a lightning strike will occur within the next 10-15 minutes within 2.5 miles of the sensor

The warning triggers a 15 second horn, and a strobe light that goes off until the all clear, when the horn will go off three times, 5 seconds each

Each of these sensor sites have a Warning Horn and flashing Strobe Light, and each of them also has 1 to 3 remote warning horn/strobe light sites that are slaved off of the nearest sensor site.

Using your smart phone, tablet or computer, go to: 

There are five detector sites in Gillette, one in Wright.

When you open up one of the sites, there is a lot of information displayed:

The little red bar in the center of the black line displays the type of electrical charge being sensed at that site. 

- If the bar moves to the left, it’s mostly negative charges.

+ If to the right, it’s mostly positive charges. 

LHL—Lightning Hazard Level

The percentage chance of lightning / amount of energy within 15 miles of this sensor

DI—Dynamic Index

The percentage chance of lightning / amount of energy change within 2.5 miles of this sensor

AD—Activity Detector

The time since the last discharge/lightning strike. It will count down from 10 minutes, and at zero, an ALL Clear will be signaled (three 5 second blasts of the warning horn)

FCC-Field Collapse Count

How many lightning strikes (field discharges) within 15 miles since the last time the system went into alert status (the point when it last predicted a strike within 2.5 miles within the next 10-15 minutes)

Wright JR/SR High School ThorGaurd Siren

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