From the home page click your state on the map or the name of your state below the map. On the next page click radar/lightning as your map type. Another way to display lightning is available using the Stormtracker. From the home page click the weather maps link on the left and choose Stormtracker. To zoom in click a region name above the map.
For more information on using the Stormtracker see the FAQ.
16:15 EDT Its been a crazy week in weather for South Australia, with today being no different.