page_title: Tropical Storm Debby (2006)
section_title: Storm history
hierarchical_section_title: Tropical Storm Debby (2006) / Storm history
caption_attribution_description: English: Track map of Tropical Storm Debby 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: Tropical Storm Debby was the fifth tropical storm of the 2006 Atlantic hurricane season. Debby formed just off the coast of Africa on August 21 from a tropical wave. After passing near the Cape Verde islands, Debby moved generally northwestward for much of its life, reaching a peak intensity of 50 mph. Strong wind shear weakened the storm, and Debby dissipated on August 27 over the northern Atlantic Ocean.
  Early in its life, Debby was forecasted to pass through the southern Cape Verde islands as a tropical storm, possibly causing life-threatening flooding. Most computer models consistently predicted Debby to move to the northwest throughout its lifetime, though intensity was more of a problem for forecasters. The National Hurricane Center continually predicted Debby to strengthen into hurricane status, though strong vertical shear eventually prevented the storm from becoming a hurricane.
context_section_description: A strong tropical wave moved off the coast of Africa late on August 20, and almost convective banding and a broad circulation. A large area of low pressure formed within the wave the next day while located 260 miles southeast of the Cape Verde islands. Though convection decreased early on August 21, the area of low pressure stayed well-organized and the system developed into Tropical Depression Four late on August 21. Water temperatures remained warm enough for development, while upper level shear was minimal as the depression moved west-northwestward because of a ridge of high pressure to its north. Original predictions by the National Hurricane Center also forecasted a turn to the northwest based computer model predictions, as quoted by forecaster James Franklin, "The models have also been excellently wrong thus far".
  In spite of a decrease in convection shortly after forming, the large depression remained well organized, with a 575 mile wide wind field. On August 22, as it passed 140 miles (225 km) miles to south of the Cape Verde islands, deep convection developed over the center of circulation, and early on August 23 the depression strengthened into Tropical Storm Debby about 300 miles southwest of Cape Verde. Banding features continued to organize as the system slowly strengthened, and on August 23 Debby reached its peak intensity of 50 mph over the open waters of the Atlantic Ocean. Forecasters predicted Debby to continue to strengthen to reach hurricane status, while its projected path placed the storm in an area of warm water temperatures and moderate upper level shear.
  Shortly after reaching its peak intensity, Debby encountered an area of dry air, and as a result weakened. The low level circulation detached itself from the dying convection while the system as a whole continued west-northwestward. Convection redeveloped over a portion of the center, while banding features redeveloped as well. Organization continued, and Debby again reached its peak intensity of 50 mph on August 24. Southerly wind shear displaced the convection to the north of the center, and Debby weakened to a weak tropical storm on August 25. The center of the storm became asymmetric and elongated, and on August 26 Debby weakened to a tropical depression. Convection remained minimal and it quickly degenerated into a remnant area of low pressure. The low turned to the north and north-northeast ahead of an approaching trough, and on August 28 the low dissipated.
caption: Storm path
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