Subtropical Storm Candelaria
 Storm at peak of intensity | |
| Formed | 25 January 2010 |
|---|---|
| Dissipated | 5 February 2010 |
| Lowest pressure | 994 mb (29.35 inHg) |
| Highest winds | |
| Damage | Unknown |
| Areas affected | Spain, Morocco, France |
Storm Candelaria was an unusual meteorological event in 2010 that principally affected the Canary Islands.
Meteorological history
During January 25 and 26, a ripple of the polar jet began in the upper layers of the troposphere in the northwestern Atlantic Ocean. This caused a trough in the middle and upper troposphere. This phenomenon caused the formation of a cold surface low with a cold core in height, as do the great majority of storms in those latitudes (hence the polar origin of the disturbance). From January 26–29, the storm descended in latitude following the normal cycle of a cold low, isolating itself from the general atmospheric circulation.
On the 29th, the low entered a state of maturation-dissipation and the system began to decrease in speed, after encountering obstacles in its path such as the anticyclonic ridge, which prevented its advance. This fact caused the depression in medium and high levels to couple with the low level depression, characteristic of the final phase of storms in mid-latitudes (state of occlusion).
Thanks to the coupling state, the system was in an area with little vertical shear (few changes in wind direction and speed at the same point and at different heights). This led to the development of large cumulonimbus clouds in the immediate vicinity of the low. In this zone of instability, an important mesoscale convective system (SCM) was formed. This was due to the coincidence of the convergence of winds caused by the surface disturbance and aided by the cold core, causing the vertical ascents of the air masses to be favored in the low environment. A warm core formed at low altitude, probably caused by the latent heat of condensation (heat given off by the condensation of water vapor) and the system acquired a remarkable size. The tropical depression began to collect humid tropical air from the intertropical convergence zone (ITCZ) and continued to have cold air in the middle and upper layers of the troposphere. This generated an embedded storm, working as a feedback loop.[1] Some people and meteorologists believe that this system was subtropical, but there is uncertainty about that.
Effects
Rains dropped about 200 litres per square metre (4.1 imp gal/sq ft) some 20 centimetres (7.9 in) deep, turning streets and ravines into rivers, flooding cars and establishments, cutting roads and creating chaos. In Santa Cruz de Tenerife, 41 liters per square meter fell in one hour. In La Laguna 213 in 7 hours, 270 in 24 hours and Anaga 253 in 12 hours. The storm set other local records dumping 150 cm in Breña Baja, 149 in Corral de Juncos, 129 in Guarazoa (Hierro), 145 El Paso (La Palma), 202 in Güimar. 146 in La Culata (Gran Canaria), Arafo, all in 24 hours. In Puerto de Mogan (Gran Canaria) 45.4 liters were collected, with a maximum intensity of 96.6 liters per square meter an hour in the middle of the night. In Gando they accounted for 62.1 liters, with an average intensity of 111.6 liters per m2 an hour at 5.32 in the morning.[2]
References
External links
- "'Candelaria' (31 Ene-2 Feb 2010): Un híbrido denominado "tropical like cyclone"". Foro de Tiempo.com. Retrieved 2018-05-28.
- PAÍS, EL; AGENCIAS (2010-02-02). "Canarias comienza a recuperar la normalidad tras el temporal". El País (in español). ISSN 1134-6582. Retrieved 2018-05-28.
- Tenerife, La Opinión de. "Otra vez llovió como nunca - La Opinión de Tenerife". www.laopinion.es. Retrieved 2018-05-28.
- "eldia.es - lunes, 1 de febrero de 2010. Tenerife en Canarias y en el mundo". eldia.es (in español). Retrieved 2018-05-28.
- "Cinco años de la riada del 1 de febrero de 2010". RTVC. Archived from the original on 2019-02-20. Retrieved 2018-05-28.
- "Efemérides meteorológicas en Canarias del siglo XX y XXI: Parte V - Revista del Aficionado a la Meteorología". Revista del Aficionado a la Meteorología (in español). 2016-09-29. Retrieved 2018-05-28.
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