Hurricane Allen

Map key

Saffir–Simpson scale

  Tropical depression (≤38 mph, ≤62 km/h)
  Tropical storm (39–73 mph, 63–118 km/h)
  Category 1 (74–95 mph, 119–153 km/h)
  Category 2 (96–110 mph, 154–177 km/h)
  Category 3 (111–129 mph, 178–208 km/h)
  Category 4 (130–156 mph, 209–251 km/h)
  Category 5 (≥157 mph, ≥252 km/h)
  Unknown

Storm type

Tropical cyclone

Subtropical cyclone

Extratropical cyclone, remnant low, tropical disturbance, or monsoon depression

Allen was an early Cape Verde-type hurricane which originated from a tropical wave that previously moved off the African coastline on July 30. The system developed as it moved westward, becoming a tropical depression on August 1. ^[1] However, the National Hurricane Center did not initiate advisories on Allen until almost 24 hours later, when it was centered 1,300 mi (2,100 km) east of the Windward Islands. ^[2] Early on August 2, as the depression moved towards the Caribbean, it had intensified and became the first named storm of the season. ^[1] The National Hurricane Center noted that conditions appeared favorable for further intensification. However, it was also noted that a large cold-low north of Puerto Rico was producing strong westerly wind shear, which would cause Allen to possibly encounter unfavorable conditions within 72 hours. ^[3] Although slower forward movement was anticipated, ^[4] Allen remained at generally the same westward pace, between 17 and 23 mph (27 and 37 km/h). ^[1] By August 3, the National Hurricane Center retracted predictions of less favorable conditions from the cold-low north of Puerto Rico, since that weather system was weakening and moving westward. ^[5]

Hurricane Allen

Allen at its record peak intensity in the Yucatán Channel on August 7

Most intense Atlantic hurricanes
Rank	Hurricane	Season	Pressure
			hPa	inHg
1	Wilma	2005	882	26.05
2	Gilbert	1988	888	26.23
3	"Labor Day"	1935	892	26.34
4	Rita	2005	895	26.43
5	Allen	1980	899	26.55
6	Camille	1969	900	26.58
7	Katrina	2005	902	26.64
8	Mitch	1998	905	26.73
	Dean	2007
10	Maria	2017	908	26.81
Source: HURDAT [6]

At 1600 UTC on August 3, the National Hurricane Center upgraded Allen to hurricane status, as an Air Force plane recorded winds of 100 mph (160 km/h). ^[7] However, in post-analysis, it was discovered that Allen had been a hurricane since 0000 UTC on August 3. Shortly after the upgrade, Allen began a period of rapid deepening, and intensified into a major hurricane at 0000 UTC August 4, while roughly 38 mi (61 km) northwest of Bridgetown, Barbados. Six hours later, Allen passed only 8 mi (13 km) south of St. Lucia at 0600 UTC. ^[1] Although the National Hurricane Center noted that conditions favored slow strengthening, ^[8] Allen continued to rapidly intensify, and became a Category 4 hurricane only two hours after that advisory. ^[1] Later on August 4, the National Hurricane Center noted a barometric pressure of 946  mbar (946  hPa ; 27.9  inHg ), and that it would not drop significantly within 24 hours. ^[9] Shortly before 0000 UTC on August 5, the minimum pressure decreased to 924 mbar (924 hPa; 27.3 inHg), which was noted as equivalent to Hurricane David in the previous season. ^[10]

By August 5, Allen intensified into a Category 5 hurricane while south of Puerto Rico. This made Allen the earliest Category 5 hurricane in the Atlantic on record, ^[1] but was later surpassed by Hurricane Emily which reached that intensity on July 16, 2005. During this time, Allen attained a central pressure of 911 mbar (911 hPa; 26.9 inHg), which was the lowest pressure on record in the eastern Caribbean sea until Hurricane Maria of 2017, which peaked at 908 mbar (908 hPa; 26.8 inHg). Hence, the barometric pressure dropped by 35 mbar (35 hPa; 1.0 inHg) less than 10 hours after the National Hurricane Center stated that the pressure would not decrease significantly within the time of 24 hours. The eye passed between Hispaniola and Jamaica as a Category 4 hurricane. After friction with the mountains of Haiti and Jamaica had caused it to weaken, Allen intensified back to a Category 5 hurricane, retaining this intensity for over a day. It then moved past the islands of Cayman Brac and Little Cayman causing moderate damage on Cayman Brac with winds near 135 mph. The storm then moved between Cuba and the Yucatán Peninsula, reaching its peak intensity of 190 mph (310 km/h) and a minimum pressure of 899 mbar (899 hPa; 26.5 inHg) while crossing the Yucatán Channel. During Allen's trek through the Caribbean Sea and the Gulf of Mexico, its center of circulation never crossed over land despite its close passage to various islands in and around the Caribbean sea. ^[6]

Allen again weakened to a Category 4 storm due to friction with Mexico and an eyewall replacement cycle, but restrengthened into a Category 5 hurricane for a third time as it moved over the open waters of the Gulf of Mexico, keeping this intensity for nearly a full day and with a pressure drop to 909 mbar (909 hPa; 26.8 inHg), the lowest pressure ever recorded in the western Gulf of Mexico. In the day prior to landfall, a dry air mass in the western Gulf of Mexico caused the storm to weaken substantially.^{[ failed verification ] [6]} Allen made landfall August 10 around noon local time on South Padre Island near Port Isabel, Texas as a Category 3 storm with maximum sustained winds of 115 mph (185 km/h) and a pressure of 945 mbar (945 hPa; 27.9 inHg). Landfall on the mainland was along the sparsely populated Texas coast somewhere between Laguna Vista and Port Mansfield. It became extratropical on August 11. ^[6]

Preparations

Hurricane Allen in the Gulf of Mexico on August 8.

As Allen approached the Caribbean Sea, gale warnings and a hurricane watch were issued for the islands of Barbados, St. Lucia, St. Vincent, Dominica, Grenada, Martinique, and Guadeloupe during the daylight hours of August 3. Gale warnings were in effect for Antigua from 11 am on August 3 until 11 am on August 4. Hurricane warnings were raised for Barbados, St. Vincent, St. Lucia, Martinique, and Dominica from the early afternoon of August 3 until the late morning of August 4. As Allen moved into the Caribbean sea, hurricane watches were issued for southeastern sections of the Dominican Republic and the southwestern peninsula of Haiti from 11 am on August 4 until the morning of August 5. Gale warnings were then in effect for the southern Dominican Republic from the night of August 4 into the night of August 5, while southern Haiti maintained the warnings from the night of August 4 into the morning of August 5. The hurricane watch was issued for Jamaica during the morning hours of August 5, while hurricane warnings were raised for the southwest peninsula of Haiti from the late morning of August 5 into the morning of August 6. ^[11] Hurricane warnings went into effect for Jamaica from around noon on August 5 until late in the afternoon of August 6. The Cayman Islands saw hurricane watches issued from the afternoon of August 5 into the morning of August 6 before the watches were upgraded to hurricane warnings from the morning until late afternoon of August 6. ^[12]

As Allen approached the Gulf of Mexico, hurricane warnings were raised for the northeast Yucatán peninsula of Mexico from the afternoon of August 6 into the morning of August 8. Gale warnings were in effect for the Florida Keys from the evening of August 6 into the early morning of August 8. As Allen approached its final landfall, the northeast Mexican coast and Texas coast were placed under a hurricane watch from the morning of August 8 until the morning of August 9 for Mexico and the afternoon of August 9 for Texas. Hurricane warnings were posted for the Texas coast during the afternoon of August 8, and were lowered north of Freeport, Texas during the afternoon of August 9 and south of Freeport during the afternoon of August 10. Gale warnings and a hurricane watch were issued for the Louisiana coast from Vermilion Bay westward from the afternoon of August 8 into the afternoon of August 9. Hurricane warnings were in effect for northeast Mexico from the early afternoon of August 9 into the late afternoon of August 10. Hurricane warnings were downgraded to gale warnings between High Island, Texas and Freeport, Texas between the late afternoon of August 9 and the late afternoon of August 10. Hurricane watches were dropped for the Louisiana coast during the late afternoon of August 9. Hurricane warnings were downgraded to gale warnings for the lower Texas coast south of Freeport from the late afternoon of August 10 into the early morning of August 11. ^[12]

Impact

Hurricane Allen's rainfall across Texas and Mexico

Deaths and damage by area

Country	Deaths	Damage	Source
Barbados	None	$6 million	[13]
Cayman Islands	None		[14]
Cuba	3		[15]
Dominican Republic	7	$47 million	[15]
Grenada	None	$5.3 million	[15]
Guadeloupe	1	Unknown	[14]
Haiti	220	$400 million	[13] [16]
Jamaica	8	$100 million	[13]
Martinique	None	$68 million	[15]
Mexico	None	None	[16]
St. Lucia	6	$235 million	[13]
St Vincent and The Grenadines	None	$16.3 million	[15]
United States	6	$630 million	[16] [17]
Offshore	17	$60 million	[16]
Total	269	$1.57 billion

Allen caused just over $1 billion (1980 USD) in damages and killed at least 269 people throughout its course (including indirect deaths). ^{[14] [16]}

Caribbean islands

Allen passing through the Windward Islands as a strong Category 3 hurricane on August 4

In Barbados, preliminary damages were estimated to be $1.5 million (1980 USD). About 500 houses were either damaged or destroyed. No deaths were reported. St. Lucia sustained catastrophic damage from the strong category 3 hurricane. Sustained winds of 90 knots (170 km/h) and a sea level pressure as low as 967 millibars (28.6 inHg) were reported at Hewanorra. ^[18] Eighteen people lost their lives as a result of the storm's passage. One death in Guadeloupe was attributed to Allen. ^[14] In Martinique, damage was extensive as the storm passed 50 miles (80 km) south of the island. Waves 6 metres (20 ft) high battered the coast of the island during the storm. ^[19]

In the central Caribbean, Cayman Brac was hit by winds in excess of 115 mph (185 km/h) which caused considerable property damage. A coral reef at Discovery Bay, Jamaica was devastated by the wave action from the storm. ^[20] Offshore Jamaica, greater numbers of smaller-sized Damselfishes was witnessed in the wake of Allen. ^[21] Eight deaths in Jamaica were attributed to Allen. Damage was very significant along the northeast coast, where the hurricane made its closest approach to the island and created a 12 metres (39 ft) storm surge. Three deaths were attributed to Allen in Cuba. ^[16]

Extensive damage occurred in Haiti due to high winds and flash flooding. Total costs for that country were estimated to be at more than $400 million (1980 USD). Roughly 60% of the nation's coffee crop was destroyed. In all, 220 people were killed and 835,000 were left homeless. In Port-au-Prince, 41 deaths were caused by tin roofs flying off and around 1200 were made homeless by flooding. ^[22] Another 140 people were reported dead from flooding. ^[23]

Mexico

Areas of northeastern Mexico saw heavy rains with the passage of Allen, with the highest totals exceeding 7 inches (180 mm). ^[24] The hurricane earlier brushed the Yucatán Peninsula. As Allen only affected sparsely populated regions of Mexico, there were no reports of significant damage. ^[16]

United States

Storm surge smashed building in Corpus Christi

Corpus Christi TX Ruins after Hurricane Allen.

In Texas, the storm surge was reported as high as 12 feet (3.7 m) at Port Mansfield, though it may have been higher elsewhere along the Texas coast. A peak wind gust of 129 mph (208 km/h) was also measured at Port Mansfield. Tropical storm-force winds in Corpus Christi, Texas blew roof gravel through the city, which led to substantial glass breakage to the 18-story Guarantee Bank Building and a 12-story wing of Spohn hospital. ^[25] Allen dumped 10 to 20 inches (250 to 510 mm) of rain in south Texas, ending a summer-long drought during the Heat Wave of 1980. ^[26]

The storm caused seven deaths in Texas and 17 in Louisiana (most resulting from the crash of a helicopter evacuating workers from an offshore platform). Allen spawned several tornadoes in Texas. One tornado caused $100 million in damage when it hit Austin, Texas, making it the costliest tropical cyclone-spawned tornado in recorded history. Overall, however, the storm caused limited damage in the United States due to its suddenly diminished power and because its highest tides and winds hit a sparsely-populated portion of the Texas coast. ^{[16] [27]}

Retirement

See also: List of retired Atlantic hurricane names

Because of the hurricane's destructive impacts, the name Allen was retired from the Atlantic tropical storm name list by the World Meteorological Organization in the spring of 1981, and will never again be used for a future Atlantic hurricane. ^[28] It was replaced with Andrew for the 1986 season. ^{[29] [30]}

See also

• Tropical cyclones portal

• List of Category 5 Atlantic hurricanes
• Hurricane Carla (1961) – Category 4 hurricane that took a similar path.
• Hurricane Beulah (1967) – Category 5 hurricane that took a similar path.
• Hurricane Emily (2005) – Category 5 hurricane that took a similar path.
• Hurricane Wilma (2005) – Category 5 hurricane that was the strongest in the Atlantic Ocean in terms of barometric pressure.
• Hurricane Patricia (2015) – Fastest 1-minute sustained winds ever recorded.
• Hurricane Harvey (2017) – Category 4 hurricane that took a similar path.

Notes

1. All wind speeds in the article are maximum sustained winds sustained for one minute, unless otherwise noted.

References

1. National Hurricane Center (1980). "Hurricane Allen Tropical Cyclone Report Page 2". National Oceanic and Atmospheric Administration . Retrieved May 13, 2011.
2. Gilbert Clark (August 1, 1980). "Tropical Depression Advisory Number 1". National Hurricane Center . Retrieved May 13, 2011.
3. "Discussion for Tropical Storm Allen, 11 p.m. EDT, August 1, 1980". National Hurricane Center. August 2, 1980. Retrieved May 13, 2011.
4. John Hope (August 2, 1980). "Discussion for Tropical Storm Allen, 11 a.m. EDT, August 2, 1980". National Hurricane Center . Retrieved May 13, 2011.
5. Paul Hebert (August 3, 1980). "Discussion for Tropical Storm Allen, 11 a.m. EDT, August 3, 1980". National Hurricane Center . Retrieved May 13, 2011.
6. "Atlantic hurricane best track (HURDAT version 2)" (Database). United States National Hurricane Center. April 5, 2023. Retrieved April 16, 2024. This article incorporates text from this source, which is in the public domain.
7. Neil Frank (August 3, 1980). "Discussion for Hurricane Allen, 2:30 p.m. EDT, August 3, 1980". National Hurricane Center . Retrieved May 13, 2011.
8. Gilbert Clark (August 4, 1980). "Discussion for Hurricane Allen, 11 p.m. EDT, August 3, 1980". National Hurricane Center . Retrieved May 13, 2011.
9. Neil Frank (August 4, 1980). "Discussion for Hurricane Allen, 11 a.m. EDT, August 4, 1980". National Hurricane Center . Retrieved May 13, 2011.
10. Miles Lawrence (August 4, 1980). "Discussion for Hurricane Allen, 5 p.m. EDT, August 4, 1980". National Hurricane Center . Retrieved May 13, 2011.
11. National Hurricane Center (1980). "Hurricane Allen Tropical Cyclone Report Page 3". National Oceanic and Atmospheric Administration . Retrieved February 16, 2010.
12. National Hurricane Center (1980). "Hurricane Allen Tropical Cyclone Report Page 4". National Oceanic and Atmospheric Administration . Retrieved February 16, 2010.
13. Lawrence, Miles B; Pelissier, Joseph M (July 1, 1981). "Atlantic Hurricane Season of 1980". Monthly Weather Review. 109 (7). American Meteorological Society: 1567–1582. Bibcode:1981MWRv..109.1567L. doi: 10.1175/1520-0493(1981)109<1567:AHSO>2.0.CO;2 .
14. National Hurricane Center. Hurricane Allen Tropical Cyclone Report Page 5 (Report). National Oceanic and Atmospheric Administration. Retrieved December 6, 2012.
15. Centre for Research on the Epidemiology of Disasters. "EM-DAT: The Emergency Events Database" . Université catholique de Louvain.
16. National Hurricane Center. "Hurricane Allen Tropical Cyclone Report Page 6". National Oceanic and Atmospheric Administration. Retrieved December 14, 2008.
17. Hebert, Paul J; Taylor, Glenn; National Hurricane Center (January 1983). The Deadliest, Costliest, and Most Intense United States Hurricanes of This Century (and Other Frequently Requested Hurricane Facts) (PDF) (NOAA Technical Memorandum NWS TPC-18). United States National Oceanic and Atmospheric Administration's National Weather Service. p. 5. Archived (PDF) from the original on September 24, 2012. Retrieved December 2, 2012.
18. Miles B. Lawrence; Joseph M. Pellisier (July 1981). "Atlantic Hurricane Season of 1980" (PDF). Monthly Weather Review. 109 (7). American Meteorological Society: 1567–1572. Bibcode:1981MWRv..109.1567L. doi:10.1175/1520-0493(1981)109<1567:AHSO>2.0.CO;2 . Retrieved February 17, 2010.
19. K. Bosser; F. Levoy; J. C. Flageollet; O. Monfort; H. Rousset (Summer 2000). "Trade Wind Intensification and Hurricanes on a Caribbean Beach, Martinique Island: A Comparison of their Morphological Effects From Field Experiments and Numerical Simulations". Journal of Coastal Research. 15 (3). Coastal Education & Research Foundation, Inc.: 877–899. JSTOR   4300098.
20. Richard B. Aronson; Kenneth P. Sebens; John P. Ebersole (2003). "Hurricane Hugo's Impact on Salt River Submarine Canyon, St. Croix, U.S. Virgin Islands" (PDF). Atlantic Oceanographic and Meteorological Laboratory . Retrieved February 16, 2010.
21. Robert K. Turpin; Stephen A. Bortone (2002). "Pre- and post-hurricane assessment of artificial reefs: evidence for potential use as refugia in a fishery management strategy". ICES Journal of Marine Science. 59: S75. doi: 10.1006/jmsc.2002.1191 .
22. Jim Williams (2010). Port au prince, Haiti's history with tropical systems. Hurricanecity.com. Retrieved February 17, 2010.
23. "Allen Leaves Flooding In Its Wake; 140 New Deaths Reported". Saint Petersburg Times . Associated Press. August 12, 1980. Retrieved February 29, 2012.
24. David M. Roth (January 15, 2007). "Storm Total Rainfall From Hurricane Allen (1980)". Hydrometeorological Prediction Center . Retrieved February 16, 2010.
25. Joseph E.; Minor P.E.; William L. Beason; Timothy P. Marshall (1981). "Effects of Hurricane Allen on Buildings and Coastal Construction" (PDF). Fourth National Conference on Wind Engineering Research. Archived from the original (PDF) on January 3, 2014. Retrieved February 16, 2010.
26. David M. Roth (January 27, 2007). "Hurricane Allen". Hydrometeorological Prediction Center . Retrieved February 16, 2010.
27. "Allen Floods Texas, Fizzles Over Mexico". Pittsburgh Post-Gazette . Associated Press. August 12, 1980. Retrieved February 29, 2012.
28. "Tropical Cyclone Naming History and Retired Names". Miami, Florida: National Hurricane Center. Retrieved April 5, 2024.
29. National Hurricane Operations Plan (PDF) (Report). Washington, D.C.: NOAA Office of the Federal Coordinator for Meteorological Services and Supporting Research. May 1986. p. 3-7. Retrieved April 5, 2024.
30. "Andrew, Agatha, top 1986 list". The Gadsden Times . Gadsden, Alabama. Associated Press. May 23, 1986. Retrieved April 5, 2024.

Further reading

• Marks, Frank D. (1985). "Evolution of the Structure of Precipitation in Hurricane Allen (1980)". Monthly Weather Review. 113 (6): 909–930. Bibcode:1985MWRv..113..909M. doi: 10.1175/1520-0493(1985)113<0909:EOTSOP>2.0.CO;2 .

External links

• National Weather Service - Hurricane Allen
• The Wake of Hurricane Allen in the Western Gulf of Mexico
• Effects of Hurricane Allen on Buildings and Coastal Construction
• Pertinent Meteorological Data for Hurricane Allen of 1980
• KENS-TV (San Antonio) news footage from 1980 of the impact Allen had on Texas