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Hurricane Pauline

Category 4 Pacific hurricane in 1997

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Hurricane Pauline produced torrential rainfall along the Mexican coastline, peaking at 32.62 inches (829 mm) in Puente Jula. Intense flooding and mudslides in some of the poorest areas of Mexico killed between 230 and 500 people, making it one of the deadliest Eastern Pacific storms in recorded history. The passage of the hurricane destroyed or damaged tens of thousands of houses, leaving around 300,000 people homeless and causing $447.8 million in damage (1997 USD).


Meteorological history

The origins of Hurricane Pauline were thought to have been spawned by a tropical wave, which moved off the coast of Africa into the tropical Atlantic Ocean on September 16, 1997. The wave subsequently moved across the Atlantic Ocean and the Caribbean Sea, before it moved across northern South America and entered the Pacific Ocean near Panama on September 26. On October 5, after a low-level circulation centre and an area of deep atmospheric convection had persisted on visible satellite imagery, the United States National Hurricane Center (NHC) initiated advisories on the wave and designated it as Tropical Depression Eighteen-E. At this time the system was located about 290 mi (465 km) to the southeast of Puerto Ángel, Mexico, and had started to move eastwards, as a result of a trough of low pressure over central America that had disrupted the normal steering currents. During that day, the system continued to develop with a banding feature wrapping more than halfway around the low-level circulation center, before the system intensified into a tropical storm and was named Pauline by the NHC on October 6.

A strong high-pressure system eroded the trough over southeastern Mexico, which turned Pauline to the northeast. An eye feature developed late on October 6, and early on the next day Pauline intensified into a hurricane about 265 miles (426 km) southeast of Salina Cruz after turning to the north and northwest. Pauline rapidly intensified shortly after due to favorable conditions for continued development, and 18 hours after becoming a hurricane it attained a peak intensity of 130 mph (210 km/h). The winds of the hurricane weakened slightly to 115 mph (185 km/h), but on October 8 Pauline re-strengthened to reach winds of 130 mph (210 km/h) a short distance off the coast of Mexico. The hurricane turned more to the west-northwest while paralleling the southern coast of Oaxaca, and Pauline quickly weakened due to interaction with the mountainous terrain before landfall near Puerto Ángel as a 110 mph (180 km/h) hurricane early on October 9. The tropical cyclone continued to weaken as it paralleled the coast a short distance inland. On October 10, Pauline dissipated over Jalisco and no longer had a well-defined low-level circulation.

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