Track map & timeline · Eastern Pacific · July 31 – August 8, 1971
TD TS Cat 1 2 3 4 5 · dashed = post-tropical / remnant low. Click any point or table row to jump there.
01 · The story
Hurricane Ilsa (1971) was a Category 3 hurricane of the 1971 Eastern Pacific season. It formed on July 31, 1971, 284 mi SSW of Puerto Escondido, Oaxaca, Mexico, reached its peak of 115 mph (185 km/h) and a minimum pressure of 978 mb on August 3, 1971, and never made landfall. It rapidly intensified by 57 mph in 24 hours (to 86 mph on August 1, 1971). The storm lasted 8.8 days and travelled about 2,171 miles (3,493 km).
02 · Intensity
03 · Timeline
| Date · UTC | Status | Wind | Pressure | Position | Nearest place |
|---|---|---|---|---|---|
| Jul 31 00:00 | TD | 29 mph | — | 11.9°N 98.2°W | open ocean |
| Jul 31 06:00 | TD | 29 mph | — | 12.0°N 99.2°W | open ocean |
| Jul 31 12:00 | TD | 29 mph | — | 12.1°N 100.1°W | open ocean |
| Jul 31 18:00 | TD | 29 mph | — | 12.3°N 101.0°W | open ocean |
| Aug 1 00:00 | TD | 29 mph | — | 12.5°N 101.8°W | open ocean |
| Aug 1 06:00 | TS | 52 mph | — | 13.4°N 103.7°W | open ocean |
| Aug 1 12:00 | Cat 1 | 86 mph | — | 14.5°N 105.4°W | open ocean |
| Aug 1 18:00 | Cat 1 | 86 mph | — | 15.5°N 106.3°W | open ocean |
| Aug 2 00:00 | Cat 1 | 86 mph | — | 16.2°N 107.2°W | open ocean |
| Aug 2 06:00 | Cat 1 | 86 mph | — | 16.5°N 108.2°W | open ocean |
| Aug 2 12:00 | Cat 1 | 86 mph | — | 16.8°N 109.2°W | open ocean |
| Aug 2 18:00 | Cat 1 | 86 mph | — | 17.1°N 110.1°W | open ocean |
| Aug 3 00:00 | Cat 2 | 104 mph | — | 17.5°N 110.8°W | open ocean |
| Aug 3 06:00 | Cat 3 | 115 mph | — | 17.8°N 111.2°W | open ocean |
| Aug 3 12:00 | Cat 3 | 115 mph | — | 18.2°N 111.5°W | open ocean |
| Aug 3 18:00 | Cat 1 | 92 mph | — | 18.5°N 111.8°W | open ocean |
| Aug 4 00:00 | Cat 1 | 75 mph | 978 mb | 18.8°N 112.0°W | open ocean |
| Aug 4 06:00 | Cat 1 | 75 mph | — | 19.1°N 112.2°W | open ocean |
| Aug 4 12:00 | Cat 1 | 75 mph | — | 19.5°N 112.5°W | open ocean |
| Aug 4 18:00 | Cat 1 | 75 mph | — | 20.1°N 112.8°W | open ocean |
| Aug 5 00:00 | Cat 1 | 75 mph | — | 20.8°N 113.5°W | open ocean |
| Aug 5 06:00 | Cat 1 | 75 mph | — | 21.2°N 114.6°W | open ocean |
| Aug 5 12:00 | Cat 1 | 75 mph | — | 21.6°N 115.8°W | open ocean |
| Aug 5 18:00 | TS | 52 mph | 988 mb | 22.0°N 117.0°W | open ocean |
| Aug 6 00:00 | TS | 52 mph | — | 22.5°N 118.2°W | open ocean |
| Aug 6 06:00 | TS | 52 mph | — | 22.9°N 119.4°W | open ocean |
| Aug 6 12:00 | TS | 52 mph | — | 23.4°N 120.5°W | open ocean |
| Aug 6 18:00 | TD | 29 mph | — | 23.8°N 121.7°W | open ocean |
| Aug 7 00:00 | TD | 29 mph | — | 23.8°N 122.9°W | open ocean |
| Aug 7 06:00 | TD | 29 mph | — | 23.5°N 123.6°W | open ocean |
| Aug 7 12:00 | TD | 29 mph | — | 23.1°N 124.2°W | open ocean |
| Aug 7 18:00 | TD | 29 mph | — | 22.9°N 124.9°W | open ocean |
| Aug 8 00:00 | TD | 29 mph | — | 22.7°N 125.6°W | open ocean |
| Aug 8 06:00 | TD | 29 mph | — | 22.5°N 126.3°W | open ocean |
| Aug 8 12:00 | TD | 29 mph | — | 22.3°N 127.1°W | open ocean |
| Aug 8 18:00 | TD | 29 mph | — | 22.3°N 127.1°W | open ocean |
⬇ Download track data (CSV) · public-domain NOAA best track
Questions
No — the NOAA best-track record shows no landfall for Ilsa.
At its peak on August 3, 1971, Ilsa was a Category 3 hurricane with maximum sustained winds of 115 mph (185 km/h) and a central pressure of 978 mb.
8.8 days, from July 31, 1971 to August 8, 1971, including 102 hours at hurricane strength (12 as a major hurricane). It travelled about 2,171 miles.
The 6-hourly positions, winds, pressure and wind radii are available as CSV on this page (track.csv) — they come from the NOAA National Hurricane Center's HURDAT2 database and are in the public domain.
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