1973 Pacific typhoon season
| 1973 Pacific typhoon season | |
|---|---|
Season summary map
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| Seasonal boundaries | |
| First system formed | June 30, 1973 (record latest) |
| Last system dissipated | November 27, 1973 |
| Strongest storm | |
| Name | Nora |
| • Maximum winds | 295 km/h (185 mph) (1-minute sustained) |
| • Lowest pressure | 875 hPa (mbar) |
| Seasonal statistics | |
| Total depressions | 25 |
| Total storms | 21 |
| Typhoons | 12 |
| Super typhoons | 3 |
| Total fatalities | Unknown |
| Total damage | Unknown |
| Related articles | |
| Tropical storm (SSHWS) | |
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| Duration | June 30 – July 6 |
|---|---|
| Peak intensity | 110 km/h (70 mph) (1-min) 980 hPa (mbar) |
| Category 1 typhoon (SSHWS) | |
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| Duration | July 5 – July 10 |
|---|---|
| Peak intensity | 130 km/h (80 mph) (1-min) 980 hPa (mbar) |
| Tropical storm (SSHWS) | |
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| Duration | July 12 – July 15 |
|---|---|
| Peak intensity | 100 km/h (65 mph) (1-min) 985 hPa (mbar) |
| Category 4 super typhoon (SSHWS) | |
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| Duration | July 12 – July 20 |
|---|---|
| Peak intensity | 240 km/h (150 mph) (1-min) 915 hPa (mbar) |
| Category 2 typhoon (SSHWS) | |
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| Duration | July 13 – July 21 |
|---|---|
| Peak intensity | 155 km/h (100 mph) (1-min) 975 hPa (mbar) |
| Category 3 typhoon (SSHWS) | |
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| Duration | July 17 – July 29 |
|---|---|
| Peak intensity | 195 km/h (120 mph) (1-min) 940 hPa (mbar) |
| Tropical storm (SSHWS) | |
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| Duration | July 27 – July 30 |
|---|---|
| Peak intensity | 75 km/h (45 mph) (1-min) 1000 hPa (mbar) |
| Category 1 typhoon (SSHWS) | |
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| Duration | August 8 – August 15 |
|---|---|
| Peak intensity | 130 km/h (80 mph) (1-min) 980 hPa (mbar) |
| Tropical storm (SSHWS) | |
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| Duration | August 8 – August 13 |
|---|---|
| Peak intensity | 85 km/h (50 mph) (1-min) 1000 hPa (mbar) |
The 1973 Pacific typhoon season was the latest start to the typhoon season on record. It had no official bounds, but most tropical cyclones tend to form in the northwestern Pacific Ocean between June and December. These dates conventionally delimit the period of each year when most tropical cyclones form in the northwestern Pacific Ocean.
The scope of this article is limited to the Pacific Ocean, north of the equator and west of the international date line. Storms that form east of the date line and north of the equator are called hurricanes; see 1973 Pacific hurricane season. Tropical Storms formed in the entire west pacific basin were assigned a name by the Joint Typhoon Warning Center. Tropical depressions in this basin have the "W" suffix added to their number. 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.
25 tropical depressions formed this year in the Western Pacific, of which 21 became tropical storms. 12 storms reached typhoon intensity, of which 3 reached super typhoon strength.
Tropical Storm Bille, which developed on July 12 east of the Philippines, rapidly strengthened on the 14th and 15th to a 150 mph super typhoon. It tracked due north, fluctuating in intensity for the next 3 days. A building ridge over the Sea of Japan forced Billie to the northwest, where it weakened greatly, first to a tropical storm on the 18th, then to a tropical depression on the 19th as it passes over northeastern China. The storm dissipated on the 20th.
Typhoon Dot struck Hong Kong causing sustained storm force winds, killing one person.
Hainan, Qionghai Jiaji town recorded a minimum central pressure of 937.8 hPa when Marge landfall.Marge killed 903 people in Hainan.
The monsoon trough spawned a tropical depression east of the Philippines on October 1. Under weak steering currents, it meandered westward, where favorable conditions allowed for it to strengthen, first to a tropical storm on the 2nd, then to a typhoon on the 3rd. Nora continued to the northwest, and explosively deepened on the 5th and 6th to a 185 mph super typhoon. At the time, it had a minimum central pressure of 877 millibars, the lowest pressure on record at the time and currently tied for 9th. The typhoon weakened as it headed to the northwest, and struck northeastern Luzon on the 7th as a 115 mph typhoon. Nora continued to the northwest, weakening to a minimal typhoon as it hit southeast China on the 10th. The typhoon caused 18 fatalities, with over $2 million in damage.
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