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The Class System of
Warnings is based primarily on the extent of the risk and secondly on
the time factor. The coded Class System by itself can, in no way,
indicate the intensity or size of the cyclone nor the extent to which
gusts will exceed 120 km/h.
The threshold of 120 km/h represents the speed at which significant damages may start to occur to trees and structures.
Code Flags Flown on Certain Buildings are as Follows:-
Warning Class I - One red flag
Warning Class II - Two red flags
Warning Class III - Three red flags
Warning Class IV - Three red flags
Termination - One blue flag