AFAIK, the counts are all from testtags.php and generated by Weather-Display. I don't know of additional settings to enable.
testtags template has $lighteningbearing = '%nexstormbearing%';
$lighteningdistance = '%nexstormdistance%';
$lighteningcountlasthournextstorm = '%lighteningcountlasthournextstorm%';
$lighteningcountlastminutenextstorm = '%lighteningcountlastminutenextstorm%';
$lighteningcountlast12hournextstorm = '%lighteningcountlast12hournextstorm%';
$lighteningcountlast30minutesnextstorm = '%lighteningcountlast30minutesnextstorm%';