About five years or more ago,I was checking out www.lightningstorm.com
and one of the links in that website was about two or three models of
electronic advanced lightning warning devices.I think one of the lnks
said the devices can give about one minute of advanced lightning strike
warning.I guess a search on the internet might turn up some information
about those devices.I think I remember they are pretty pricey
though.Unless the prices on them have come down.
cuhulin