Tropical Storm Carlos (2003)
Encyclopedia
Tropical Storm Carlos was the first of five tropical cyclone
Tropical cyclone
A tropical cyclone is a storm system characterized by a large low-pressure center and numerous thunderstorms that produce strong winds and heavy rain. Tropical cyclones strengthen when water evaporated from the ocean is released as the saturated air rises, resulting in condensation of water vapor...

s to make landfall
Landfall (meteorology)
Landfall is the event of a tropical cyclone or a waterspout coming onto land after being over water. When a waterspout makes landfall it is reclassified as a tornado, which can then cause damage inland...

 during the 2003 Pacific hurricane season
2003 Pacific hurricane season
The 2003 Pacific hurricane season produced an unusually large number of tropical cyclones which affected Mexico. The most notable cyclones the year were Hurricanes Ignacio and Marty, which killed 2 and 12 people in Mexico, respectively, and were collectively responsible for about...

. It formed on June 26 from a tropical wave
Tropical wave
Tropical waves, easterly waves, or tropical easterly waves, also known as African easterly waves in the Atlantic region, are a type of atmospheric trough, an elongated area of relatively low air pressure, oriented north to south, which move from east to west across the tropics causing areas of...

 to the south of Mexico. It quickly strengthened as it approached the coast, and early on June 27 Carlos moved ashore in Oaxaca
Oaxaca
Oaxaca , , officially Estado Libre y Soberano de Oaxaca is one of the 31 states which, along with the Federal District, comprise the 32 federative entities of Mexico. It is divided into 571 municipalities; of which 418 are governed by the system of customs and traditions...

 with winds of 65 mph (100 km/h). The storm rapidly deteriorated to a remnant low
Low pressure area
A low-pressure area, or "low", is a region where the atmospheric pressure at sea level is below that of surrounding locations. Low-pressure systems form under areas of wind divergence which occur in upper levels of the troposphere. The formation process of a low-pressure area is known as...

, which persisted until dissipating on June 29. Carlos brought heavy rainfall to portions of southern Mexico, peaking at 337 mm (13.3 in) in two locations in Guerrero. Throughout its path, the storm damaged about 30,000 houses, with a monetary damage total of $86.7 million pesos (2003 MXN
Mexican peso
The peso is the currency of Mexico. Modern peso and dollar currencies have a common origin in the 15th–19th century Spanish dollar, most continuing to use its sign, "$". The Mexican peso is the 12th most traded currency in the world, the third most traded in the Americas, and by far the most...

, $8 million 2003 USD). At least nine people were killed throughout the country, seven due to mudslides and two from river flooding; there was also a report of two missing fishermen.

Meteorological history

The origins of Carlos were from a tropical wave
Tropical wave
Tropical waves, easterly waves, or tropical easterly waves, also known as African easterly waves in the Atlantic region, are a type of atmospheric trough, an elongated area of relatively low air pressure, oriented north to south, which move from east to west across the tropics causing areas of...

 that exited the west coast of Africa on June 14. The wave moved westward across the Atlantic Ocean and Caribbean Sea, with little evidence of its existence on satellite imagery. By June 20 it crossed Central America into the eastern Pacific Ocean, later spawning an area of convection, or thunderstorms, south of the Gulf of Tehuantepec
Gulf of Tehuantepec
Gulf of Tehuantepec is a large body of water on the Pacific coast of the Isthmus of Tehuantepec, southeastern Mexico, at . Most of the hurricanes that form in the Eastern Pacific organize in or near this body of water...

. The National Hurricane Center
National Hurricane Center
The National Hurricane Center , located at Florida International University in Miami, Florida, is the division of the National Weather Service responsible for tracking and predicting weather systems within the tropics between the Prime Meridian and the 140th meridian west poleward to the 30th...

 (NHC) first mentioned the system in its tropical weather outlook on June 24, by which time a low pressure center
Low pressure area
A low-pressure area, or "low", is a region where the atmospheric pressure at sea level is below that of surrounding locations. Low-pressure systems form under areas of wind divergence which occur in upper levels of the troposphere. The formation process of a low-pressure area is known as...

 developed. Gradually, the system continued to develop
Tropical cyclogenesis
Tropical cyclogenesis is the term that describes the development and strengthening of a tropical cyclone in the atmosphere. The mechanisms through which tropical cyclogenesis occurs are distinctly different from those through which mid-latitude cyclogenesis occurs...

 due to light wind shear
Wind shear
Wind shear, sometimes referred to as windshear or wind gradient, is a difference in wind speed and direction over a relatively short distance in the atmosphere...

, with rainbands and convection located near the broad center. By early on June 26, the disturbance had organized enough for the NHC to initiate advisories on Tropical Depression Three-E, about 130 miles (210 km) south-southwest of Puerto Escondido, Oaxaca.

Upon first being classified as a tropical cyclone
Tropical cyclone
A tropical cyclone is a storm system characterized by a large low-pressure center and numerous thunderstorms that produce strong winds and heavy rain. Tropical cyclones strengthen when water evaporated from the ocean is released as the saturated air rises, resulting in condensation of water vapor...

, the depression had a slightly elongated circulation. An anticyclone
Anticyclone
An anticyclone is a weather phenomenon defined by the United States' National Weather Service's glossary as "[a] large-scale circulation of winds around a central region of high atmospheric pressure, clockwise in the Northern Hemisphere, counterclockwise in the Southern Hemisphere"...

 to its north was forecast to track westward, which would allow the depression to track west-northwestward and remain offshore; however, the NHC noted uncertainty in its motion. The cloud pattern gradually organized, with warm water temperatures and lessening wind shear. At 1200 UTC
Coordinated Universal Time
Coordinated Universal Time is the primary time standard by which the world regulates clocks and time. It is one of several closely related successors to Greenwich Mean Time. Computer servers, online services and other entities that rely on having a universally accepted time use UTC for that purpose...

 on June 26, it is estimated the depression attained tropical storm status; upon doing so, the NHC named the storm Carlos. As it reached tropical storm intensity, Carlos began an erratic northward track toward the Mexican coast, under the influence of a trough
Trough (meteorology)
A trough is an elongated region of relatively low atmospheric pressure, often associated with fronts.Unlike fronts, there is not a universal symbol for a trough on a weather chart. The weather charts in some countries or regions mark troughs by a line. In the United States, a trough may be marked...

. It quickly strengthened, developing a well-defined eye feature
Eye (cyclone)
The eye is a region of mostly calm weather found at the center of strong tropical cyclones. The eye of a storm is a roughly circular area and typically 30–65 km in diameter. It is surrounded by the eyewall, a ring of towering thunderstorms where the second most severe weather of a cyclone...

 in the center of the convection. Based on the eye, it is estimated Carlos made landfall
Landfall (meteorology)
Landfall is the event of a tropical cyclone or a waterspout coming onto land after being over water. When a waterspout makes landfall it is reclassified as a tornado, which can then cause damage inland...

 early on June 27 with peak winds of 65 mph (100 km/h), about 60 miles (95 km) west of Puerto Escondido, Oaxaca, or about 150 miles (245 km/h) east-southeast of Acapulco
Acapulco
Acapulco is a city, municipality and major sea port in the state of Guerrero on the Pacific coast of Mexico, southwest from Mexico City. Acapulco is located on a deep, semi-circular bay and has been a port since the early colonial period of Mexico’s history...

, Guerrero
Guerrero
Guerrero officially Estado Libre y Soberano de Guerrero is one of the 31 states which, with the Federal District, comprise the 32 Federal Entities of Mexico. It is divided in 81 municipalities and its capital city is Chilpancingo....

.

As Carlos moved inland, it turned to the northwest in response to the anticyclone over Mexico, and it quickly weakened to tropical depression status. By 12 hours after landfall, there was little evidence of a circulation on satellite imagery. Late on June 27, Carlos degenerated into a non-convective remnant low pressure area
Low pressure area
A low-pressure area, or "low", is a region where the atmospheric pressure at sea level is below that of surrounding locations. Low-pressure systems form under areas of wind divergence which occur in upper levels of the troposphere. The formation process of a low-pressure area is known as...

 near Acapulco. The circulation turned to the southwest and emerged into the Pacific Ocean; by 0000 UTC on June 29, the system dissipated completely.

Preparations and impact

When the cyclone first formed, the Government of Mexico issued a tropical storm warning
Tropical cyclone warnings and watches
Warnings and watches are two levels of alert issued by national weather forecasting bodies to coastal areas threatened by the imminent approach of a tropical cyclone of tropical storm or hurricane intensity. They are notices to the local population and civil authorities to make appropriate...

 from Acapulco
Acapulco
Acapulco is a city, municipality and major sea port in the state of Guerrero on the Pacific coast of Mexico, southwest from Mexico City. Acapulco is located on a deep, semi-circular bay and has been a port since the early colonial period of Mexico’s history...

, Guerrero
Guerrero
Guerrero officially Estado Libre y Soberano de Guerrero is one of the 31 states which, with the Federal District, comprise the 32 Federal Entities of Mexico. It is divided in 81 municipalities and its capital city is Chilpancingo....

 to Punta San Telmo, Michoacán
Michoacán
Michoacán officially Estado Libre y Soberano de Michoacán de Ocampo is one of the 31 states which, with the Federal District, comprise the 32 Federal Entities of Mexico. It is divided in 113 municipalities and its capital city is Morelia...

, although initially it was forecast to remain offshore. After Carlos attained tropical storm status and when it was correctly anticipated to make landfall, the warning area was adjusted from Salina Cruz
Salina Cruz
Salina Cruz is a major seaport on the Pacific coast of the Mexican state of Oaxaca. It is the state's third-largest city and is municipal seat of the municipality of the same name.It is part of the Tehuantepec District in the west of the Istmo Region....

, Oaxaca
Oaxaca
Oaxaca , , officially Estado Libre y Soberano de Oaxaca is one of the 31 states which, along with the Federal District, comprise the 32 federative entities of Mexico. It is divided into 571 municipalities; of which 418 are governed by the system of customs and traditions...

 to Zihuatanejo
Zihuatanejo
Zihuatanejo or Ixtapa-Zihuatanejo, is the fourth-largest city in the Mexican state of Guerrero. Politically the city belongs to the municipality of Zihuatanejo de Azueta in the western part of Guerrero, but both are commonly referred to as Zihuatanejo...

, Guerrero. Although the storm moved ashore in Oaxaca, its rainbands also affected the Mexican states of Chiapas
Chiapas
Chiapas officially Estado Libre y Soberano de Chiapas is one of the 31 states that, with the Federal District, comprise the 32 Federal Entities of Mexico. It is divided in 118 municipalities and its capital city is Tuxtla Gutierrez. Other important cites in Chiapas include San Cristóbal de las...

, Tabasco
Tabasco
Tabasco officially Estado Libre y Soberano de Tabasco is one of the 31 states which, with the Federal District, comprise the 32 Federal Entities of Mexico. It is divided in 17 municipalities and its capital city is Villahermosa....

, Veracruz
Veracruz
Veracruz, formally Veracruz de Ignacio de la Llave officially Estado Libre y Soberano de Veracruz de Ignacio de la Llave , is one of the 31 states that, along with the Federal District, comprise the 32 federative entities of Mexico. It is divided in 212 municipalities and its capital city is...

, Puebla
Puebla
Puebla officially Estado Libre y Soberano de Puebla is one of the 31 states which, with the Federal District, comprise the 32 Federal Entities of Mexico. It is divided in 217 municipalities and its capital city is Puebla....

, and Guerrero. On the day when Carlos made landfall, it dropped heavy rainfall, with 24 hour statewide maxima of 254 mm (10 in) in Río Verde, Oaxaca, and 112 mm (4.42 in) in Petatlán
Petatlán
Petatlán is a city and municipality located along the Pacific Coast of the state of Guerrero in Mexico. It is part of the Costa Grande region between Zihuatanejo and Acapulco. The city is known for the Sanctuary of the Padre Jesús de Petatlán, a 17th century image of Christ that is claimed to...

, Guerrero. Throughout the country, rainfall peaked at 337 mm (13.3 in) in both Marquelia
Marquelia
Marquelia is a city and seat of the municipality of Marquelia, in the state of Guerrero, south-western Mexico....

 and Azoyú
Azoyú
Azoyu is a city and seat of the municipality of Azoyu, in the state of Guerrero, south-western Mexico....

 in Guerrero.

Tropical Storm Carlos affected 79 municipalities in Oaxaca
Municipalities of Oaxaca
The Mexican state of Oaxacais made up of 571 municipalities —more than any other state....

 with flooding or rainfall, and much of the region was declared a disaster area; as a result, disaster funds were opened. Across the region, the combination of rainfall and strong winds downed power lines, disrupted phone service, and flooded two major highways; additionally, the storm left widespread damage to other roads and airstrips. In northwestern Oaxaca, seven people were killed when the heavy rainfall triggered a mudslide. Mudslides were reported elsewhere in the state, and about 30,000 homes were damaged. In one town, the flooding forced 150 families to evacuate to shelters. In Guerrero, a flooded river killed two people. Four fishermen were reported missing, possibly swept out to sea due to the storm; the Mexican army searched offshore for several days, rescuing two of the four fishermen by four days after the storm. Overall, the storm affected about 148,000 people, and monetary damage totaled $86.7 million pesos (2003 MXN
Mexican peso
The peso is the currency of Mexico. Modern peso and dollar currencies have a common origin in the 15th–19th century Spanish dollar, most continuing to use its sign, "$". The Mexican peso is the 12th most traded currency in the world, the third most traded in the Americas, and by far the most...

, $8 million 2003 USD).

See also

  • Other tropical cyclones named Carlos
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