What does it mean in lightning l / km ^ 2?

What does height mean? Above sea level? My height is 157ft

The wind scale is poorly visible. Some colors are the same. 3 and 30 m / s. I want to see by color where the wind is hurricane speed. More than 30 m / s (100 km / h). For example, red or black.

Installed the program. Installed the plugin. Pressed it without releasing it to the screen. Clicked the widget below. Installed the widget. Deleted the program. The widget remained. When you click, the screen with the animation opens. A screen photo of an Android tablet.

Left the plugin on Android. The desktop shows a picture of North America, the temperature. Select the display area with the update of the photo interval in an hour not found.

@TZ Thanks

Hello. What does the height of 100 meters mean? Above sea level or terrain? The navigation satellite writes that I have a height of 160 meters above sea level (160 m msl).