Tropical Storm Danny was the fourth named storm of the 1991 Atlantic hurricane season. Danny developed on September 7 well to the east of the Leeward Islands. Danny moved westward to west-northward and dissipated on September 11 as it was approaching the central portion of the Leeward Islands.
Danny caused no damage and no deaths.
|Formation||September 7, 1991|
|Dissipation||September 11, 1991|
|Highest winds||50 mph|
|Lowest pressure||998 mbar|
|Part of the||1991 Atlantic hurricane season|
Danny originated from a vigorous tropical wave that emerged off the coast of Africa on September 5. The wave produced a marked low-level wind shift as it passed Dakar, Senegal. As it emerged into the far eastern Atlantic Ocean, the wave quickly acquired a banding structure. As the wave continued westward, METEOSAT satellite imagery indicated that the wave acquired sufficient organization to be designated Tropical Depression Seven at 0000 UTC September 7 while located about 270 miles south-southwest of the southwesternmost Cape Verde Islands. After forming, the depression moved swiftly westward and strengthened into a tropical storm at around 1200 UTC September 8. Due to a strong subtropical ridge to the north, Danny headed westward to west-northwestward. Although Danny changed little in strength between 0600 UTC September 9 and 1200 UTC September 10, the cyclone is estimated to have reached its peak intensity of 50 mph with a minimum central pressure of 998 mb near 0000 UTC September 10. During this time, Danny's center was tucked underneath a central dense overcast feature. Later that day, an upper-level low near 22°N 60°W produced strong vertical shear over Danny. At 1200 UTC September 11, Danny weakened to a tropical depression while located around 180 miles east of Guadeloupe. By 1800 UTC that day, Danny degenerated into an open tropical wave when reconnaissance aircraft was unable to detect a well-defined low-level center. Danny's remnants moved northwest and north, and eventually merged with a frontal zone over the north central Atlantic Ocean.