Coverage of thunderstorm layer: 0 = no clouds, 1 = fully overcast. Returns 0 if no thunderstorm layer is active. Measured in fractional units. Read-only.
Note: All weather variables report the weather in the aircraft's current location. This weather information only reflects the weather defined by the weather commands if the aircraft is in the area defined by the Weather and Weather_Char commands.
Example
IF CLOUD_THUNDER_COVERAGE < 0.3 THEN
PRINT "It should be easy to stay clear of the thunderstorms."
ENDIF