Otis (2005)

A tropical depression formed about 120 nautical miles south of Manzanillo, Mexico, around 0000 UTC on 28 September 2005. The system drifted west-southwest and then turned northwest, becoming Tropical Storm Otis on 29 September and a hurricane on 30 September. Otis moved generally northwestward through 1–2 October, then slowed and drifted erratically near the Pacific coast of the Baja California peninsula as steering currents weakened. It lost tropical-storm strength on 2–3 October, became a remnant low on 4 October, and dissipated by 5 October.

Otis did not make a confirmed landfall as a tropical cyclone. Forecasts and warnings were issued for portions of southern Baja California—including areas from Agua Blanca to San Andrésito and from La Paz to San Evaristo—because models predicted a possible crossing, but the storm remained offshore and all watches and warnings were discontinued by 3 October.

The storm’s peak intensity was estimated at 90 knots (about 104 mph) with a minimum central pressure of 970 mb at 0600 UTC on 1 October. That peak corresponds to a Category 2 hurricane on the Saffir–Simpson scale. Otis’s best-track record shows it reached 80–90 kt for a short period around 1 October before weakening over cooler waters.

While the core of Otis stayed offshore, higher elevations in southern Baja California experienced tropical-storm-force winds; an automated station at Cabo San Lucas (elevation 224 m) reported a 10‑minute average wind of 43 kt with a gust to 55 kt on 30 September. Two ships—Volendam and Star Harmonia—reported tropical-storm-force winds and pressures near Otis. The report notes media mentions of flooding in parts of southern Baja California but does not give specific storm surge heights or detailed rainfall totals at named locations.

There were no confirmed reports of damage or casualties attributed to Otis in the official record. The most affected region in reports and warnings was the southern Baja California peninsula, but with the storm remaining offshore the NHC found no confirmed deaths or damage in their post-storm assessment.

Noteworthy items: Otis formed relatively close to land and its genesis was not well anticipated until about 18 hours beforehand. Official track forecasts for Otis were generally better than the 1995–2004 average, and several numerical models (notably the GFS) performed even better. Hurricane warnings were issued based on forecasts that the storm would cross the peninsula, but those warnings did not verify because Otis never reached Baja as a tropical cyclone.