Hurricane Alice (December 1954)

Infobox Hurricane
Name=Hurricane Alice
Type=hurricane
Year=1954
Basin=Atl
Image location=Hurricane Alice 01 jan 1955 radar.jpg

Virgin Islands
Formed=December 30, 1954
Dissipated=January 6, 1955
1-min winds=70
Pressure=987
Da

Inflated=0
Fatalities=None reported
Areas=Lesser Antilles
Hurricane season=1954 Atlantic hurricane season

Hurricane Alice is the only known Atlantic hurricane to span two calendar years, and one of only two named Atlantic tropical cyclones, along with Tropical Storm Zeta of 2005, to do so. The twelfth tropical cyclone and the eighth hurricane of the 1954 Atlantic hurricane season, Alice developed on December 30, 1954 from a trough of low pressure in the central Atlantic Ocean in an area of unusually favorable conditions. The storm moved southwestward and gradually strengthened to reach hurricane status. After passing through the Leeward Islands on January 2, 1955, Alice reached peak winds of 80 mph (130 km/h) before encountering cold air and turning to the southeast. It dissipated on January 6 over the southeastern Caribbean Sea.

Alice produced heavy rainfall and moderately strong winds across several islands along its path. Saba and Anguilla were affected the most, with total damage amounting to $623,500 (1955 USD, $4.7 million 2006 USD). There was an earlier hurricane named Alice in the season. Operationally, lack of definitive data prevented the U.S. Weather Bureau from declaring the system a hurricane until January 2. It received the name "Alice" in early 1955, though re-analysis of the data supported extending its track to the previous year, resulting in two tropical cyclones of the same name in one season.

Meteorological history

A cold front moved southeastward from the East Coast of the United States on December 23, 1954, and passed over Bermuda two days later. A strong anticyclone developed behind the cold front, and on December 26 a trough extended southward from the cold front. The anticyclone moved southeastward as the trough and cold front moved eastward. The trough gradually decelerated as high pressures altered the upper level flow to that of an easterly flow. Convection increased over the trough as it moved over relatively warm waters, about 1º C above normal, and began undergoing tropical cyclogenesis after a circulation began to develop along the northern portion of the trough. The system continued to organize as it moved to the west, and based on three ship reports confirming a closed circulation, it is estimated the system developed into a tropical depression on December 30 while located 770 miles (1245 km) east-northeast of Barbuda in the Lesser Antilles.cite web|author=José A. Colón|year=1955|title=On the formation of Hurricane Alice, 1955|publisher=U.S. Weather Bureau|accessdate=2006-12-07|url=http://docs.lib.noaa.gov/rescue/mwr/084/mwr-084-01-0001.pdf|format=PDF]

With a narrow ridge of high pressure to its north, the depression moved west-southwestward. Atmospheric conditions were unusually favorable for the time of the year due to the ridge of high pressure preventing cold air from reaching the central Atlantic Ocean. This allowed the depression to intensify into a tropical storm later on December 30, based on direct observations. There were few direct observations for the following days, but it is estimated the storm intensified into a hurricane on December 31 while located about 475 miles (770 km) east-northeast of Barbuda. On January 1, 1955, a ship within 10 miles (16 km) of the center reported hurricane force winds and a pressure of 987 mbar. Based on this report and several other ship reports, the system was recognized as a tropical low by the San Juan Weather Bureau Office. The hurricane continued to the southwest, and entered the Caribbean Sea on January 2 after passing between Saint Martin and Saint-Barthélemy. A portion of the eyewall moved over Saint Martin and Saba. Based on near-hurricane force winds from the affected islands, an information bulletin named the system as Hurricane Alice while in the northeastern Caribbean Sea. Throughout its track, Alice was a small tropical cyclone with a diameter of only around 60 miles (95 km).

Reconnaissance Aircraft flew into Hurricane Alice on January 3 and confirmed the existence of the tropical cyclone by reporting winds between 60 to 65 mph (95 to 105 km/h) and a warm core center. It is estimated Alice continued to intensify as it tracked southwestward in the Caribbean Sea, and attained peak winds of 80 mph (130 km/h) while located about 95 miles (150 km) west-northwest of Montserrat. While near its peak the hurricane developed a ring of convection around its eye, and Alice maintained peak winds for about 24 hours until cold air from the north weakened it. Extratropical cyclogenesis occurred north of Bermuda on January 3, which weakened the high pressure system to the north of Alice and turned the flow in the Caribbean Sea to that of cold northwesterly winds. Alice turned to the southeast on January 4 and weakened to a tropical storm shortly thereafter. Convection gradually became disorganized, and after weakening to a tropical depression on January 5, Alice dissipated on January 6 while located about 100 miles (160 km) west-northwest of Grenada.

Impact, naming and records

Subsequent to the confirmation of the existence of Hurricane Alice, the U.S. Weather Bureau Office in San Juan, Puerto Rico warned the islands of the northern Lesser Antilles to prepare for strong winds and rough seas. Hurricane Alice produced moderate to strong winds across the islands, peaking at 81 mph (130 km/h) in Saint-Barthélemy and 75 mph (120 km/h) in Saba.cite web|author=Gordon E. Dunn, Walter R. Davis, Paul L. Moore|year=1955|title=Hurricanes of 1955|publisher=Miami, Florida Weather Bureau Office|accessdate=2006-12-07|url=http://docs.lib.noaa.gov/rescue/mwr/083/mwr-083-12-0315.pdf|format=PDF] The hurricane dropped moderate to heavy rainfall across several islands, including a peak of 11.27 inches (286 mm) in 48 hours recorded at Saba. Due to its small size, only a few islands received significant effects from the hurricane. Saint-Barthélemy, Saba, Anguilla, Sint Eustatius, and Saint Kitts reported damage from the hurricane, totaling $623,500 (1955 USD, $4.7 million 2006 USD). Damage was heaviest on Saba and Anguilla, occurring primarily to shipping facilities and crops. 626 houses were destroyed or severely damaged on Anguilla, as well.cite web|author=Alan Warren|year=2001|title=Flood risk management for a Caribbean island|publisher=Institution of Civil Engineers on Anguilla|accessdate=2006-12-07|url=http://www.atypon-link.com/TELF/doi/pdf/10.1680/wama.154.3.199.38729|format=PDF] The damage was caused mostly by heavy rainfall and rough seas, not the direct action of the wind. The passage of Hurricane Alice greatly troubled the economies of the small affected islands. Additionally, the outer rainbands of the storm alleviated dry conditions on Puerto Rico which had persisted since the previous October. No deaths were reported.

This storm formed on December 30, as mentioned above. However, in the days before satellites, meteorologists had to rely on reports from ships and islands in the Atlantic to locate and track storms. This information was often sketchy; two cyclones, including a Category 2 hurricane, operationally went undetected in 1954. It was officially recognized as a significant tropical cyclone on January 2, 1955. At the time, the National Weather Service used the same naming list each year, so the name given to this storm was "Alice" and it was designated as a part of the 1955 Atlantic hurricane season. However, it was found during post-storm analysis that the storm had actually formed on December 30, and was instead a part of the 1954 season. Therefore, the season had two storms named "Alice" — the first storm of the season, and the last. Had Alice been discovered in 1954, it would have been named Irene, the next name on the 1954 list. Some reports named this storm "Alice2" to avoid confusion with the earlier Alice from June 1954.cite web|author=National Weather Service|year=2006|title=Has there ever been a Tropical Storm so late in the year before?|accessdate=2006-12-07|url=http://www.weather.gov/storms/zeta/] cite web|author=Hurricane Enterprises LLC|year=2006|title=Oddball Tropical Systems|accessdate=2006-12-07|url=http://www.hurricanealmanac.com/BonusContentOddball.pdf|format=PDF]

Alice was the first Atlantic tropical cyclone to form the latest in a calendar year, forming six hours later in the season than Tropical Storm Zeta in 2005. No known tropical cyclones have formed during January, although an unnamed subtropical storm during the 1978 season formed on January 18. Alice was one of only eight Atlantic tropical cyclones to form in the month of December, and was one of only two tropical cyclones to exist in January, excluding the subtropical storm from 1978. Alice was the first of two Atlantic tropical cyclones to exist in two hurricane seasons, the other being 2005's Tropical Storm Zeta. The hurricane was also the strongest tropical cyclone in the month of January.cite web|author=Hurricane Research Division|year=2006|title=Hurdat Data for Tropical Cyclones 1851-2005|publisher=NOAA|accessdate=2006-10-11|url=http://www.nhc.noaa.gov/tracks1851to2005_atl.txt|format=TXT]

ee also

* List of tropical cyclones
* List of Atlantic hurricanes

References

External links

* [http://docs.lib.noaa.gov/rescue/mwr/084/mwr-084-01-0001.pdf Monthly Weather Review: On The Formation Of Hurricane Alice, 1955]
* [http://www.aoml.noaa.gov/general/lib/lib1/nhclib/mwreviews/1955.pdf 1955 Monthly Weather Review]