1973 Pacific hurricane season
| 1973 Pacific hurricane season |
Season summary map
|
| Seasonal boundaries |
| First system formed |
June 2, 1973 |
| Last system dissipated |
October 9, 1973 |
| Strongest storm |
|
| Name |
Ava |
| • Maximum winds |
160 mph (260 km/h)
(1-minute sustained) |
| • Lowest pressure |
915 mbar (hPa; 27.02 inHg) |
| Seasonal statistics |
| Total depressions |
18 |
| Total storms |
12 |
| Hurricanes |
7 |
Major hurricanes
(Cat. 3+) |
3 |
| Total fatalities |
0 |
| Total damage |
Unknown |
| Related articles |
|
|
Pacific hurricane seasons
1971, 1972, 1973, 1974, 1975
|
| Category 5 hurricane (SSHWS) |
|
|
| Duration |
June 2 – June 12 |
| Peak intensity |
165 mph (270 km/h) (1-min) 915 mbar (hPa) |
| Tropical storm (SSHWS) |
|
|
| Duration |
June 22 – June 23 |
| Peak intensity |
70 mph (110 km/h) (1-min) 990 mbar (hPa) |
| Tropical storm (SSHWS) |
|
|
| Duration |
June 26 – June 29 |
| Peak intensity |
65 mph (100 km/h) (1-min) 999 mbar (hPa) |
| Category 4 hurricane (SSHWS) |
|
|
| Duration |
July 18 – August 3 |
| Peak intensity |
140 mph (220 km/h) (1-min) 968 mbar (hPa) |
| Category 4 hurricane (SSHWS) |
|
|
| Duration |
July 21 – July 28 |
| Peak intensity |
140 mph (220 km/h) (1-min) ≤ 972 mbar (hPa) |
| Category 1 hurricane (SSHWS) |
|
|
| Duration |
July 25 – July 30 |
| Peak intensity |
90 mph (150 km/h) (1-min) ≤ 990 mbar (hPa) |
| Tropical storm (SSHWS) |
|
|
| Duration |
July 30 – August 5 |
| Peak intensity |
60 mph (95 km/h) (1-min) 989 mbar (hPa) |
| Tropical storm (SSHWS) |
|
|
| Duration |
August 31 – September 1 |
| Peak intensity |
50 mph (85 km/h) (1-min) ≤ 1004 mbar (hPa) |
| Category 2 hurricane (SSHWS) |
|
|
| Duration |
September 22 – September 26 |
| Peak intensity |
110 mph (175 km/h) (1-min) ≤ 955 mbar (hPa) |
The 1973 Pacific hurricane season was an event in tropical cyclone meteorology. The most important system this year was Hurricane Ava, which was the most intense Pacific hurricane known at the time. Several other much weaker tropical cyclones came close to, or made landfall on, the Pacific coast of Mexico. The most serious of these was Hurricane Irah, which downed power and communication lines in parts of the Baja California Peninsula; the other landfalling storms caused rain and some flooding. No tropical cyclone this season caused any deaths.
This season had a quick start but a slow end. Overall activity was below average, with twelve named systems in total. Of these, five were tropical storms, seven were hurricanes, of which three were major (Category 3 or higher on the Saffir-Simpson hurricane scale). Just one storm formed in August, one of the least active Augusts ever in the east Pacific. The season officially started May 15, 1973, in the eastern Pacific, and June 1, 1973, in the central Pacific, and lasted until November 30, 1973. These dates conventionally delimit the period of each year when most tropical cyclones form in the northeastern Pacific Ocean. All tropical cyclones this season formed in the eastern north Pacific Ocean, often off the coast of Mexico. As is usual in the northern hemisphere, most traveled generally westward or northwestward, and two reached as far as the waters south of the Hawaiian Islands.
The season began with the formation of the pre-Ava tropical depression on June 2 and ended with the dissipation of Tropical Lillian on October 9. The season lasted a total of 129 days. No named storms formed in May, three in June, four in July, one in August, three in September, one in October, and none in November. Another six tropical depressions formed during the year, but data on them is unavailable. All of these tropical cyclones formed in the eastern north Pacific tropical cyclone basin, which encompasses the Pacific Ocean north of the equator east of 140°W. None formed in the central north Pacific, which is the remainder of the Pacific Ocean east of the international dateline.
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