| 1984 Pacific typhoon season | |
|---|---|
 Season summary map | |
| Seasonal boundaries | |
| First system formed | June 7, 1984 |
| Last system dissipated | December 12, 1984 |
| Strongest storm | |
| Name | Vanessa |
| • Maximum winds | 220 km/h (140 mph) (10-minute sustained) |
| • Lowest pressure | 880 hPa (mbar) |
| Seasonal statistics | |
| Total depressions | 44 |
| Total storms | 27 |
| Typhoons | 16 |
| Super typhoons | 2 (unofficial) |
| Total fatalities | 2,919 |
| Total damage | > $1.1 billion (1984 USD) |
| Related articles | |
The 1984 Pacific typhoon season had the second-latest start in the basin on record, only behind the previous year, 1983, by one day. Despite this, it was above average in terms of named storms and featured many intense storms. It ran year-round in 1984, but again all tropical cyclones formed between June and December. These dates conventionally delimit the period of each year when most tropical cyclones form in the northwestern Pacific Ocean. A total of 44 tropical depressions formed this year, of which only 27 became tropical storms and were assigned a name by the Joint Typhoon Warning Center. This made the season above average when compared to the long term mean of 25 storms per season. Additionally, tropical depressions that enter or form in the Philippine area of responsibility are assigned a name by the Philippine Atmospheric, Geophysical and Astronomical Services Administration or PAGASA. This can often result in the same storm having two names. This year, a total of 20 storms were named this way.
Of the 27 tropical storms, 16 reached typhoon intensity, and two reached super typhoon strength. Eight tropical cyclones moved into mainland China, four struck Vietnam, four moved through the Philippines, and one cyclone moved into South Korea. The second consecutive typhoon season with a late start, all of the season activity was contained between June and December, with August and October the most active months, contributing to half of the seasonal tropical cyclone count.