Track map & timeline · Eastern Pacific · September 1–3, 1998
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 Isis (1998) was a Category 1 hurricane of the 1998 Eastern Pacific season. It formed on September 1, 1998, 304 mi WSW of Puerto Vallarta, Jalisco, Mexico, reached its peak of 75 mph (120 km/h) and a minimum pressure of 988 mb on September 2, 1998, and never made landfall. It rapidly intensified by 40 mph in 24 hours (to 69 mph on September 2, 1998). The storm lasted 2.8 days and travelled about 680 miles (1,094 km).
02 · Intensity
03 · Impact
| City | Distance to center | When (UTC) | Storm strength then |
|---|---|---|---|
| Ciudad Obregón, Sonora, Mexico | 35 mi | Sep 3 · 16:00 UTC | TD 36 mph |
Distance from the city to the storm’s center, interpolated hourly between official fixes. Damaging winds, surge and rain reach far beyond the center.
04 · Timeline
| Date · UTC | Status | Wind | Pressure | Position | Nearest place |
|---|---|---|---|---|---|
| Sep 1 00:00 | TD | 29 mph | 1004 mb | 18.3°N 109.2°W | open ocean |
| Sep 1 06:00 | TD | 29 mph | 1004 mb | 18.8°N 109.3°W | open ocean |
| Sep 1 12:00 | TD | 35 mph | 1002 mb | 19.3°N 109.5°W | open ocean |
| Sep 1 18:00 | TS | 52 mph | 995 mb | 20.0°N 109.6°W | open ocean |
| Sep 2 00:00 | TS | 69 mph | 990 mb | 21.2°N 109.6°W | 119 mi S of Cabo San Lucas, Baja California Sur, Mexico |
| Sep 2 06:00 | TS | 69 mph | 990 mb | 22.2°N 109.5°W | 55 mi SSE of Cabo San Lucas, Baja California Sur, Mexico |
| Sep 2 12:00 | TS | 69 mph | 990 mb | 23.3°N 109.4°W | 26 mi NE of San José del Cabo, Baja California Sur, Mexico |
| Sep 2 18:00 | Cat 1 | 75 mph | 988 mb | 24.1°N 109.2°W | 70 mi E of La Paz, Baja California Sur, Mexico |
| Sep 3 00:00 | Cat 1 | 75 mph | 990 mb | 25.1°N 109.0°W | 48 mi S of Los Mochis, Sinaloa, Mexico |
| Sep 3 06:00 | TS | 69 mph | 992 mb | 26.1°N 109.1°W | 13 mi NNE of Ahome, Sinaloa, Mexico |
| Sep 3 12:00 | TS | 52 mph | 998 mb | 27.0°N 109.2°W | 16 mi ESE of Navojoa, Sonora, Mexico |
| Sep 3 18:00 | TD | 29 mph | 1001 mb | 28.0°N 109.5°W | 45 mi NE of Ciudad Obregón, Sonora, Mexico |
⬇ Download track data (CSV) · public-domain NOAA best track
Questions
No — the NOAA best-track record shows no landfall for Isis. Its closest approach to a major city was 35 miles from Ciudad Obregón, Sonora, Mexico.
At its peak on September 2, 1998, Isis was a Category 1 hurricane with maximum sustained winds of 75 mph (120 km/h) and a central pressure of 988 mb.
2.8 days, from September 1, 1998 to September 3, 1998, including 12 hours at hurricane strength. It travelled about 680 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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