page_title: Hurricane Dorian
section_title: Meteorological history
hierarchical_section_title: Hurricane Dorian / Meteorological history
caption_attribution_description: English: Track map of Hurricane Dorian of the 2019 Atlantic hurricane season. The points show the location of the storm at 6-hour intervals. The colour represents the storm's maximum sustained wind speeds as classified in the Saffir–Simpson scale (see below), and the shape of the data points represent the nature of the storm, according to the legend below. Saffir–Simpson scale Tropical depression≤38 mph≤62 km/h Category 3111–129 mph178–208 km/h Tropical storm39–73 mph63–118 km/h Category 4130–156 mph209–251 km/h Category 174–95 mph119–153 km/h Category 5≥157 mph≥252 km/h Category 296–110 mph154–177 km/h Unknown Storm type Tropical cyclone Subtropical cyclone Extratropical cyclone / Remnant low / Tropical disturbance / Monsoon depression
context_page_description: Hurricane Dorian was an extremely powerful and devastating Category 5 Atlantic hurricane, that became the most intense tropical cyclone on record to strike the Bahamas, and is regarded as the worst natural disaster in the country's history. It was also one of the most powerful hurricanes recorded in the Atlantic Ocean in terms of 1-minute sustained winds, with these winds peaking at 185 mph. In addition, Dorian surpassed Hurricane Irma of 2017 to become the most powerful hurricane on record in the open Atlantic region, outside of the Caribbean Sea and Gulf of Mexico. It was the fourth named storm, second hurricane, the first major hurricane, and the first Category 5 hurricane of the 2019 Atlantic hurricane season. Dorian struck the Abaco Islands on September 1 with maximum sustained winds of 185 mph, tying with the 1935 Labor Day hurricane for the highest wind speeds of an Atlantic hurricane ever recorded at landfall. Dorian went on to strike Grand Bahama at similar intensity, stalling just north of the territory with unrelenting winds for at least 24 hours.
context_section_description: On August 19, 2019, the National Hurricane Center (NHC) identified a tropical wave—an elongated trough of low air pressure—within a monsoon trough over Guinea and Senegal in western Africa. Convective activity associated with the wave was limited by an abundance of Saharan dust in the region. Propagating west over the tropical Atlantic Ocean, the system remained disorganized for several days. On August 23, a defined area of low pressure consolidated at the surface and thunderstorm activity increased. The system acquired sufficient organized convection to be classified as Tropical Depression Five at 15:00 UTC on August 24. At this time the system was situated 805 mi (1,300 km) east-southeast of Barbados. A deep ridge imparted continued westward movement of the depression, steering it toward the Lesser Antilles. A small cyclone, it soon developed a defined inner-core with a 12 mi (18 km) wide eye-like feature. This marked the system's intensification into a tropical storm, at which time it was assigned the name Dorian by the NHC. Thereafter, moderate wind shear and surrounding dry air limited further organization. Rainbands gradually wrapped more around Dorian on August 25–26, though convection remained inconsistent.
  Dorian continued moving west and made landfall at 01:00 UTC on August 27 in Barbados, bringing tropical storm-force winds and heavy rain. It then started moving northwestward toward Saint Lucia. At 11:00 UTC of the same day, Dorian made landfall on the island of Saint Lucia as a tropical storm, briefly disrupting the core of the storm, before entering the Caribbean Sea. The storm underwent a center relocation further north, to the west of Martinique, causing the island to experience tropical storm-force winds as well. Dorian had been predicted to travel northwest and pass over or near the Dominican Republic or Puerto Rico, possibly allowing their mountainous terrain to weaken the tropical storm. At that time, dry air and wind shear were expected to prevent Dorian from attaining hurricane status—although just barely. However, Dorian took a more northerly track than expected, causing it to pass to the east of Puerto Rico and hit the US Virgin Islands. On August 28, Dorian intensified into a Category 1 hurricane as it approached the US Virgin Islands, where hurricane-force winds were recorded; at 15:30 UTC that day, Dorian became a hurricane and made landfall in Saint Croix and a few hours later, at 18:00 UTC, Dorian made landfall on Saint Thomas at a slightly higher intensity. However, the hurricane's small size prevented mainland Puerto Rico from experiencing hurricane- or tropical storm-force winds, although this was not the case for the Spanish Virgin Islands.
  Once the system moved north past the Virgin Islands, the storm entered a more favorable environment. On the next day, the system started to rapidly intensify, reaching Category 2 status early on August 30. Rapid intensification continued, and the storm eventually reached major hurricane status several hours later, on the same day. This strengthening trend came to a halt for the remainder of the day, but soon resumed. The system continued strengthening, and on August 31, Dorian attained Category 4 major hurricane status. Dorian reached Category 5 intensity on the following day. On the morning of September 1, a dropsonde deployed by a NOAA aircraft measured a wind gust of 176 knots (326 km/h; 203 mph) at the surface. With one-minute sustained winds of 180 mph (285 km/h) and a minimum pressure of 913 mbar (27.0 inHg), the NHC noted that Dorian was the strongest hurricane in modern records to affect the northwestern Bahamas.
  At 16:40 UTC on September 1, Dorian made landfall on Great Abaco Island in the Bahamas, with one-minute sustained winds of 185 mph (298 km/h), wind gusts over 220 mph (355 km/h), and a central barometric pressure of 910 millibars (27 inHg), as Dorian reached its peak intensity during landfall. Storm chaser Josh Morgerman observed a pressure of 913.4 mbar (26.97 inHg) in Marsh Harbour. Dorian's forward speed decreased around this time, s
caption: Map plotting the track and the intensity of the storm, according to the Saffir–Simpson scale
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