page_title: Hurricane Florence (2006)
section_title: Storm history
hierarchical_section_title: Hurricane Florence (2006) / Storm history
caption_attribution_description: English: Track map of Hurricane Florence of the 2006 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 Florence was the first Atlantic hurricane to produce hurricane force winds on Bermuda since Hurricane Fabian hit the island in September 2003. The seventh tropical storm and second hurricane of the 2006 Atlantic hurricane season, Florence developed from a tropical wave in the tropical Atlantic Ocean on September 3 and followed the track of a Cape Verde-type hurricane. Because of unfavorable conditions, the system failed to organize at first, and as a result the storm grew to an unusually large size. After several days, Florence encountered an area of lesser wind shear and strengthened into a hurricane on September 10. It passed just west of Bermuda while recurving northeastward, and on September 13 it transitioned into an extratropical cyclone.
  Florence produced wind gusts of up to 115 mph on Bermuda, which caused several power outages and minor damage. Florence then brought heavy rains across Newfoundland as an extratropical storm, destroying one house and causing minor damage to several others. There were no fatalities as a result of the hurricane.
context_section_description: A tropical wave moved off the coast of Africa on August 29. It tracked slowly westward, and first showed signs of development two days later. On August 31, a second tropical wave exited the coast of Africa at a faster speed than its predecessor. The two waves interacted, and by September 2 combined to form a large area of disturbed weather across the eastern Atlantic Ocean. Convection increased within the system, and the large system developed a thick area of convection along with an organized low pressure area. By late on September 3, the system maintained a large closed circulation and enough convective organization to be named Tropical Depression Six while located about midway between the Lesser Antilles and Africa.
  After becoming a tropical cyclone, the depression had many cloud swirls inside its common center. Banding features increased in satellite pictures, though southwesterly wind shear from an upper-level trough to its northeast and the lack of an organized circulation originally prevented strengthening. Dry air encountered the depression, and as such the depression developed very slowly; forecasters maintained considerable difficulty in determining a center of circulation. It continued its motion to the west-northwest while tracking around the southern periphery of a deep-layer subtropical ridge to its north. Though convection remained focused near the outer periphery of the system, the overall organized continued to steadily increase, and it is estimated the depression strengthened into Tropical Storm Florence on September 5 while located about 1120 miles (1800 km) east-northeast of Anguilla.
  After reaching tropical storm status, the maximum sustained winds existed for three days between 40 mph (65 km/h) and 50 mph (85 km/h). This is because of the large size of Florence; the wind field reached 460 miles (745 km) wide with a radius of maximum winds of about 110 miles (170 km). By September 6, an orgained form of cloud swirls became visible, with thin rainbands developing in the southeast and northwest quadrants. As a result, hurricane forecasters predicted Florence to quickly develop and reach major hurricane status. Though convection slowly moved closer to the center of the storm, forecasters could not detect an organized center of circulation late on September 13.
  On September 7, convection developed over and to the west of the center for the first time in its duration. However, Florence failed to strengthen any further with a wind field more than 1035 miles (1670 km) in diameter. This made it diffficult to forecast the storm, since it tracked through an area of 84° F (29° C) water temperatures, light shear, and a large low-level cyclonic envelop with abundant convection. By early on September 8, the storm became a stretched out, shapeless cloud pattern not normal for a tropical cyclone. Later that day, as an anticyclone developed over Florence, the storm began to consolidate around a vorticity center on the western side of the large cyclonic envelope. It began to strengthen more steadily as the storm turned to the northwest. Early on September 10, an eye began developing inside a ring of round thick convection over the center, and shortly thereafter Florence reached hurricane status while located about 390 miles (630 km) south of Bermuda.
  Hurricane Florence turned to the north and north-northeast through a break in the subtropical ridge. Though its eyewall was open on the north side, favorable conditions led forecasters to predict Florence passing near Bermuda as a strong Category 2 hurricane. The inner core of convection became ragged-looking on satellite pictures, and based on reports from Hurricane Hunters it is estimated the hurricane reached peak winds of 90 mph (150 km/h) late on September 10. Subsequent to further erosion of the eyewall, the hurricane weakened, and on September 11 passed about 60 miles (95 km) west of Bermuda with winds of 85 mph (135 km/h). The overall cloud pattern became a little bit better organized, and Florence briefly re-strengthened before encountering increased upper-level 
caption: Storm path
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