StrikeAlert HD FieldBuilt on the trusted StrikeAlert technology, the StrikeAlert HD Field adds to the functionality of our first graphical display with a new way to help keep you informed. Heat and humidity can be a dangerous combination in the outdoors, which is why knowing your heat index is crucial. The Heat Index is a measure of how hot it really feels when relative humidity is factored in with the actual air temperature. Precautions must be taken to avoid