Tropical Storm Dennis was the fourth named storm of the 1993 Atlantic hurricane season. Dennis formed on August 23 in the far eastern Atlantic Ocean to the west-southwest of the Cape Verde Islands. Dennis moved west-northwest, quickly attaining tropical storm status. Dennis then moved north-northwest and eventually slowed and turned southwest, where it dissipated in the open Atlantic Ocean on August 28.
Dennis caused no damage and no deaths.
|Formation||August 23, 1993|
|Dissipation||August 28, 1993|
|Highest winds||50 mph|
|Lowest pressure||1000 mbar|
|Part of the||1993 Atlantic hurricane season|
Dennis originated from a tropical wave accompanied by a broad area of low pressure that moved off the coast of Africa on August 21. The wave was embedded within a large monsoon-type flow as indicated by satellite imagery as well as ship reports. Over the next 24 hours, satellite imagery indicated that the wave had a well-defined low-level circulation as well as increasing convection. At 1200 UTC August 23, the wave developed into Tropical Depression Five while located in the far eastern Atlantic Ocean to the west-southwest of the Cape Verde Islands. After forming, the depression moved slowly west and then west-northwest. At 1200 UTC August 24, the depression strengthened into Tropical Storm Dennis. Dennis reached its peak intensity of 50 mph with a pressure of 1000 mb at 0600 UTC August 25. After peaking, Dennis changed little in strength over the following 24 to 30 hours. During this period, convection was gradually decreasing. At this time, a rather strong mid-to upper-level trough became established along 50°W north of 20°N, which steered the cyclone to the northwest. This northwesterly motion brought Dennis into an area of cooler sea surface temperatures as well as increasing vertical wind shear, which caused the low-level circulation center to become displaced from the deep convection.
At 1200 UTC August 27, Dennis weakened to a tropical depression. At 1200 UTC August 28, Dennis dissipated, although its remnants meandered across the Atlantic Ocean for the next few days.
Lack of Retirement
Because it did not affect land, the name Dennis was not retired in the Spring of 1994 by the World Meteorological Organization. It was used again during 1999 and 2005, and was retired after 2005, having its name replaced with Don for the 2011 Atlantic hurricane season.