Typhoon Patsy Route Analysis
Track and Movement Characteristics
The lifecycle of Typhoon Patsy (197317) began over the open waters of the northwest Pacific. Its overall track followed a steady WNW direction before turning due west and eventually moving southward over the northern South China Sea, where it gradually dissipated. Based on its initial coordinate sequence, the system formed near (12.2°N, 144°E) at 08:00 on October 5 and initially moved slowly northwestward. By 20:00 on October 9, its center reached (15.5°N, 133.6°E), with latitude increasing from 12.2°N to 15.5°N and longitude decreasing from 144°E to 133.6°E, indicating a clear northwestward trend.
Notably, the typhoon’s track shifted slightly after reaching peak intensity. From 14:00 on October 10 to 20:00 on October 12, its latitude rose gradually from 16.1°N to 18.3°N, while its longitude advanced rapidly westward to 119.2°E. This suggests that its southward component diminished and its westward movement was mainly driven by steering flow as it crossed the Philippines and entered the Pacific Ocean. After moving into the South China Sea, it continued westward until weakening into a tropical depression near (13.8°N, 107.5°E) at 20:00 on October 15. It made no recorded landfall and remained mainly over open waters throughout its lifecycle.
Intensity evolution and historical comparison
Patsy’s intensity evolution was typical of rapid intensification followed by abrupt weakening. It intensified into a tropical storm at 20:00 on October 6 and then underwent explosive intensification. From typhoon strength at 08:00 on October 8 (35m/s, 980hPa) to super typhoon strength at 14:00 on October 10 (70m/s, 910hPa), it took only about 54h. The pressure dropped by 90hPa and the maximum wind doubled, reaching its lifetime peak, with a minimum pressure of 893hPa (note: the data table lists 910hPa at 14:00 on October 10, but the peak data indicate a minimum of 893hPa; the peak extreme value is used here to assess its high intensity). However, the peak phase was brief, and its intensity declined rapidly after October 11. By 20:00 on October 12, it had weakened into a tropical depression, indicating significant structural deterioration or worsening environmental conditions in the latter stage.
Compared with previous typhoons of the same name, Patsy in 1973 was exceptionally intense. Its peak minimum pressure of 893hPa was lower than the 905hPa recorded by Patsy in 1970 and far lower than the values of the same-named systems in 1967 (990hPa), 1965 (989hPa), and 1962 (975hPa). This indicates that the 1973 Patsy was the most intense event in the observational record for this name, demonstrating an exceptional capacity for energy release. Although it caused no direct landfall impacts, its status as an open-ocean super typhoon gave it a notable place in historical comparisons.
Typhoon Patsy routes
| Time | Position | Intensity | Wind · Pressure | Move toward |
|---|
| 10-05 08:00 | 12.2°N
144°E | Tropical Depression | 12 m/s
1006 hPa | - |
| 10-05 20:00 | 11.9°N
143.1°E | Tropical Depression | 15 m/s
1004 hPa | WSW |
| 10-06 08:00 | 12°N
142.2°E | Tropical Storm | 20 m/s
995 hPa | WNW |
| 10-06 20:00 | 12.4°N
141.6°E | Tropical Storm | 20 m/s
995 hPa | NW |
| 10-07 08:00 | 12.9°N
141.1°E | Tropical Storm | 20 m/s
995 hPa | NW |
| 10-07 20:00 | 13.7°N
140.2°E | Severe Tropical Storm | 30 m/s
985 hPa | WNW |
| 10-08 08:00 | 14.2°N
138.8°E | Typhoon | 35 m/s
980 hPa | WNW |
| 10-08 20:00 | 14.4°N
137.6°E | Typhoon | 40 m/s
975 hPa | W |
| 10-09 08:00 | 15°N
135.7°E | Severe Typhoon | 50 m/s
955 hPa | WNW |
| 10-09 20:00 | 15.5°N
133.6°E | Severe Typhoon | 50 m/s
945 hPa | WNW |
| 10-10 08:00 | 15.9°N
131.8°E | Super Typhoon | 70 m/s
893 hPa | WNW |
| 10-10 20:00 | 16.4°N
129.5°E | Super Typhoon | 65 m/s
930 hPa | WNW |
| 10-11 08:00 | 16.9°N
126.7°E | Super Typhoon | 60 m/s
960 hPa | WNW |
| 10-11 20:00 | 17.6°N
124.3°E | Typhoon | 40 m/s
970 hPa | WNW |
| 10-12 08:00 | 18.5°N
122.7°E | Severe Tropical Storm | 30 m/s
980 hPa | WNW |
| 10-12 20:00 | 18.3°N
119.2°E | Tropical Depression | 15 m/s
1002 hPa | WSW |
| 10-13 08:00 | 17.8°N
115.6°E | Tropical Depression | 15 m/s
1000 hPa | W |
| 10-13 20:00 | 17.4°N
112.5°E | Severe Tropical Storm | 25 m/s
998 hPa | W |
| 10-14 08:00 | 16.8°N
110.2°E | Tropical Depression | 15 m/s
1000 hPa | WSW |
| 10-14 20:00 | 16.3°N
109°E | Tropical Depression | 15 m/s
1000 hPa | SW |
| 10-15 08:00 | 15.2°N
108°E | Tropical Depression | 12 m/s
1004 hPa | SW |
| 10-15 20:00 | 13.8°N
107.5°E | Tropical Depression | 10 m/s
1007 hPa | SSW |
Sampled rows shown; all 43 track points are available on the interactive map or via the public API .
FAQ
Typhoon Patsy was the 1973 Typhoon.
The designation 197317 for Typhoon Patsy is the historical identifier retained by the CMA, meaning the 17th typhoon of 1973, with the international name PATSY. The internationally standardized numbering system for the northwest Pacific did not begin until 1981. Before then, agencies assigned their own numbers, so the numbers used by the JMA (Japan), the Joint Typhoon Warning Center (USA), and China’s meteorological authorities for the same typhoon may differ and cannot be compared directly.
Where does the track data for Typhoon Patsy come from?
Track data sources: China Meteorological Administration Tropical Cyclone Best Track Dataset (CMA-STI); wind speeds are 2-minute sustained wind speeds.
What is the highest level of Typhoon Patsy?
Typhoon Patsy peak intensity is Super Typhoon, max wind 70m/s, minimum central pressure 893 hPa.
Is there a Typhoon PatsyLandfall?
According to records, Typhoon Patsy is not in our coastal landfall.
Where can I view typhoon Patsy's live track map?
TyphoonSays (taifengshuo.com) provides typhoon Patsy's Track history map, multinational meteorological agency Forecast comparison, wind range with IntensityTrend, page address: https://taifengshuo.com/typhoon/197317.
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