In a year, an average of 6 Tropical Cyclones that pass or cross Ilocos Norte mostly occur during the wet season with the annual average intensity distribution of 1 Tropical Depression, 2 Tropical Storm, and 3 Typhoon. The most number of tropical cyclone is in 2006 which recorded 16 while the least is in 1983 which recorded 2.
TD - Tropical Depression (35-63 kph)
TS - Tropical Storm (64-118 kph)
T - Typhoon (>118 kph)
Source of Data: PAGASA Synoptic Station, Laoag City Ilocos Norte