Lably
Skip to content

Hurricane Opal

Category 4 Atlantic hurricane in 1995

  • 23 min read
  • 5 chapters
Hurricane Opal near peak intensity on October 4, 1995.
NOAA and NASA · Public domain

Explore on Lably

ToursExplore Lably’s 3D tours

The precursor and initial stages of Opal brought heavy rainfall and flooding to Guatemala and Mexico. In the former, flooding and landslides left about 34,000 people homeless and damage to infrastructure and agriculture. A total of 31 deaths occurred in Guatemala. In Mexico, a number of rivers overflowed in the states of Campeche and Tabasco, forcing more than 42,000 people to evacuate. The storm left hundreds of millions of dollars in damage to agriculture in Campeche alone. Nineteen people were killed in the country. In Florida, high winds and storm surge left extensive damage in the panhandle. The majority of structures were swept away or experienced some degree of damage, particularly from Wakulla County westward. In Escambia, Okaloosa, Santa Rosa and Bay counties, nearly 300 homes were destroyed and 1,000 others suffered major damage. The storm left at least $2.1 billion in damage in Florida alone. Several other states were impacted by the storm, especially Alabama, where the storm spawned many tornadoes and strong winds downed numerous trees and left about 2.6 million people without electricity. A total of 27 deaths were attributed to Opal in the United States. The hurricane overall left about $4.7 billion in damage, much of which took place in the US. Due to its destructive effects, the name Opal was retired in the spring of 1996 and replaced with Olga for the 2001 season.

Meteorological history

The origins of Hurricane Opal were linked using satellite imagery and synoptic analyses to a tropical wave that left the western coast of Africa on September 11. Ten days later, the disturbance reached the Lesser Antilles after crossing the tropical Atlantic. Continuing westward, the disturbance showed little signs of organization before entering the western Caribbean Sea on September 23. There, the wave became entangled with a broad area of low-pressure east of Nicaragua, and the combined system drifted west-northwestward toward the Yucatán Peninsula; but even then, the disturbance lacked significant development. However, a burst of thunderstorm activity occurred near the storm's center on September 27, prompting the National Hurricane Center (NHC) to declare the system a tropical depression at 18:00 UTC that day. At the time, the depression was centered 80 mi (130 km) south-southeast of Cozumel, Mexico.

The primordial depression meandered across the Yucatán Peninsula during the three days following tropical cyclogenesis due to the lack of dominant steering currents. Despite remaining over land for an extended period, the depression developed organized rainbands, and ships in the region reported weather conditions that were suggestive of a stronger system. As a result, the NHC upgraded the disturbance to tropical storm intensity at 12:00 UTC on September 30 while the storm was over the north-central coast of Yucatán; this classification resulted in the tropical cyclone being named Opal, which also made it the first Atlantic storm to be given a name starting with the letter O. Over the next two days, Opal entered the Gulf of Mexico before tracking slowly west-southwestward into the Bay of Campeche. There, the storm strengthened into a hurricane at 12:00 UTC on October 2. Shortly afterward, a primitive eye began to form. At the same time, a strong trough tracking across the United States caused Opal to slowly turn northeastward.

After clearing the Bay of Campeche, Opal accelerated towards the United States Gulf Coast. The combination of warm sea surface temperatures associated with an unusually warm pocket of ocean waters and an upper-level high pressure area over the Gulf of Mexico resulted in a highly conducive environment for intensification. After a significant reorganization in Opal's internal structure, the hurricane was able to rapidly intensify in these favorable conditions. At 12:00 UTC on October 4, Opal reached peak intensity with maximum sustained winds of 150 mph (240 km/h), making it a Category 4 hurricane on the Saffir–Simpson hurricane wind scale, and a minimum barometric pressure of 916 hPa (27.05 inHg), a pressure typical for a Category 5 hurricane. The tropical cyclone's eye measured 12 mi (19 km) at peak intensity as the storm was beginning an eyewall replacement cycle. The progression of this cycle resulted in Opal's gradual weakening thereafter. At 22:00 UTC that day, Opal made landfall between Pensacola Beach, Florida and Navarre Beach, Florida, on a stretch of beach now known as "Opal Beach", as a weakened Category 3 hurricane with winds of 115 mph (185 km/h). Weakening quickened as Opal moved further inland, degenerating into a tropical depression over Tennessee less than a day after landfall. The diffusing cyclone transitioned into an extratropical cyclone shortly afterwards; these extratropical remnants tracked towards the northeast before they were last noted along the northern shore of Lake Ontario in Eastern Ontario.

Sign in to keep reading

4 more chapters are free with a Lably account.

More in Earth science