1.The wind speed is more than 185 kph is expected in a certain area in at least 12 hours.
Storm Signal No 1
Storm Signal No 2
Storm Signal No 3
Storm Signal No 4
PSWS No. 4: The fourth storm warning signal indicates that a very intense typhoon with winds of more than 185 kph may be expected within at least 12 hours. The typhoon is potentially very destructive. Large trees are expected to be uprooted and residential and institutional buildings could be severely damaged.