User:Cooper/2003 WMHB Atlantic hurricane season
|2003 Atlantic hurricane season|
|First system formed||April 20, 2003|
|Last system dissipated||December 11, 2003|
|• Maximum winds||
165 mph (270 km/h)|
|• Lowest pressure||915 mbar (hPa; 27.02 inHg)|
The 2003 Atlantic hurricane season was a very active Atlantic hurricane season and the first since 1954 to feature tropical cyclone activity both before and after the official bounds of the hurricane season. It produced a total of 23 named storms, of which 12 became hurricanes, and 5 further strengthened into major hurricanes. At the time, it was the second most active Atlantic hurricane season on record, behind only the 1995 season, which featured 24 named storms.
The season officially began on June 1, 2003, and ended on November 30, 2003. These dates historically describe the period each year when most tropical cyclones form in the North Atlantic and are adopted by convention. However, tropical cyclogenesis is possible at any time of the year, as demonstrated by the formation of Tropical Storm Ana on April 20, which became only the second tropical cyclone on record to develop during the month of April, after Tropical Storm Andrew in 1992.
Tropical Storm Ana
|Tropical storm (SSHWS)|
|Duration||April 20 – April 24|
|Peak intensity||60 mph (95 km/h) (1-min) 994 mbar (hPa)|
The interaction of an upper-level trough and a cold front produced a non-tropical low pressure system over the western Atlantic on April 18. The low moved generally northward over the next couple of days while producing intermittent bursts of deep convection. On April 20, as the low looped southeastward, it began to separate from its parent frontal system and the central deep convection became more concentrated. By 06:00 UTC that day, convective organization had increased sufficiently for it to be classified as Subtropical Storm Ana. As it moved east-southeastward, Ana continued to become better organized, and transitioned to a tropical storm early on April 21, simultaneously reaching its peak intensity of 60 mph (95 km/h), which it maintained through the rest of the day. By early on April 22, however, Ana began to weaken as it moved over cooler sea surface temperatures and encountered strong southwesterly shear. The cyclone continued to weaken as it turned northeastward, becoming extratropical early on April 24 as it merged with a cold front. The extratropical remnant of Ana turned southeastward, then back northeastward, and although it strengthened slightly on April 26, became absorbed by a frontal system between Portugal and the Azores the following day.
Tropical Storm Bill
|Tropical storm (SSHWS)|
|Duration||June 11 – June 13|
|Peak intensity||40 mph (65 km/h) (1-min) 1006 mbar (hPa)|
One of the first significant easterly waves of the year crossed the West African coast on June 6. It moved across the eastern tropical Atlantic at low latitudes during the next several days and began to show signs of organization on June 9. By 00:00 UTC on June 11, the system had developed a closed surface circulation and was classified as a tropical depression. Moving quickly westward, the depression continued to become better organized and it strengthened into a tropical storm eighteen hours later. However, strong southwesterly shear prevented any further development, and Bill weakened to a tropical depression at 18:00 UTC on June 12. Unable to maintain its closed circulation, Bill degenerated into an open wave early the following day.
Tropical Storm Claudette
|Tropical storm (SSHWS)|
|Duration||June 29 – July 2|
|Peak intensity||70 mph (110 km/h) (1-min) 992 mbar (hPa)|
A broad area of low pressure, induced by the interaction between a tropical wave and a mid- to upper-level low, formed over the Yucatan Peninsula on June 28. Interaction with the Mexican landmass initially inhibited development, but as the low moved north-northwestward away from the Yucatan Peninsula, it began to become better organized. By 06:00 UTC on June 29, the disturbance had become sufficiently organized to be designated as a tropical depression. Later that morning, the depression strengthened into Tropical Storm Claudette. Initially, the storm's lopsided structure, caused by moderate southwesterly shear, inhibited significant strengthening. However, atmospheric conditions became more favorable as Claudette approached the Louisiana coast, and it began to strengthen quickly late on June 30. Around 01:00 UTC on July 1, Claudette made landfall on the central Louisiana coast with maximum sustained winds of 70 mph (110 km/h); this represented the storm's peak intensity. Afterward, Claudette quickly weakened as it moved inland, becoming a tropical depression by 12:00 UTC on July 1. The cyclone continued to weaken until it became extratropical on July 2, and was then absorbed by a cold front that afternoon.
The following list of names was used for named storms that formed in the North Atlantic in 2003. The names not retired from this list were used again in the 2009 season. This was the same list used in the 1997 season. The names Peter, Rose, Sam, Teresa, Victor, and Wanda were used for the first time this year. After the predetermined naming list for the 2003 season had been exhausted, additional storms were designated using letters of the Greek Alphabet, starting with Alpha, in accordance with the World Meteorological Organization (WMO)'s Region IV operational procedure. The 2003 season was the second in which this policy was implemented, after the first such occurrence during the 1995 season.