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viernes, 6 de febrero de 2015

NASA : Ola (South Pacific Ocean) .- Ola (Océano Pacífico Sur)

Hola amigos: A VUELO DE UN QUINDE EL BLOG., la Agencia Espacial NASA, nos alcanza la información sobre un Ciclón Tropical Ola:  gigantesca que se formó en el Océano Pacífico Sur, captada por NASA's Aqua Satellite . Ciclón Tropical Ola estaba siendo golpeada por cizalladura vertical del viento en el Océano Pacífico Sur, cuando el satélite Aqua de la NASA pasó por encima y captó una imagen infrarroja de la tormenta.
El 3 de febrero de 2015 a las 0900 UTC (4 am hora del Este), el Centro Conjunto de Advertencia de Tifones (JTWC) emitió su último aviso sobre el ciclón tropical Ola. En ese momento, los vientos máximos sostenidos de Ola estaban cerca de 40 nudos (46 mph / 74 kph) y debilitamiento. El epicentro fue ubicado 27.4 de latitud sur y 161,2 de longitud este, a unos 415 millas náuticas (477,6 millas / 768,6 kilometros) al suroeste de Noumea, Nueva Caledonia. Ola estaba moviendo hacia el sur-suroeste a 10 nudos (11,5 mph / 18.5 kph).

MODIS image of Ola
On Feb. 3, 2015 at 13:50 UTC (8:50a.m. EST), NASA's Aqua satellite captured this infrared image of Tropical Cyclone Ola that showed wind shear pushing clouds southeast of the center.
Image Credit: 
NASA/NRL
NASA's Aqua Satellite Sees Demise of Tropical Cyclone Ola
 
Tropical Cyclone Ola was being battered by vertical wind shear in the Southern Pacific Ocean when NASA's Aqua satellite passed overhead and captured an infrared picture of the storm.
 
On Feb. 3, 2015 at 0900 UTC (4 a.m. EST), the Joint Typhoon Warning Center (JTWC) issued its final warning on Tropical Cyclone Ola. At that time, Ola's maximum sustained winds were near 40 knots (46 mph/74 kph) and weakening. It was centered 27.4 south latitude and 161.2 east longitude, about 415 nautical miles (477.6 miles/768.6 km) southwest of Noumea, New Caledonia. Ola was moving to the south-southwest at 10 knots (11.5 mph/18.5 kph). 
 
The Moderate Resolution Imaging Spectroradiometer or MODIS instrument aboard Aqua gathered infrared data on the storm on Feb. 3, 2015 at 13:50 UTC (8:50a.m. EST) that showed the temperatures of the cloud tops. Higher cloud tops are colder and are indicative of stronger thunderstorms. The infrared data showed that the clouds and thunderstorms were being pushed to the southeast of the center from moderate northwesterly vertical wind shear.
Forecasters at the JTWC noted that the NOAA-19 polar orbiting satellite provided a microwave image that showed diminishing convection, sheared to the southeast of a partially-exposed low-level circulation center.
The vertical wind shear is forecast to continue increasing as Ola moves into cooler sea surface temperatures. Both of those factors are expected to cause the storm to dissipate by the end of the day on Feb. 3.
 


Terra image of Ola
On Feb. 1, 2015 at 23:30 UTC (6:30 p.m. EST), NASA's Terra satellite captured this visible image of Tropical Cyclone Ola in the South Pacific Ocean just west of New Caledonia.
Image Credit: 
NASA Goddard MODIS Rapid Response Team
 

Feb. 02, 2015 - NASA Satellite Sees Wind Shear Affecting Tropical Cyclone Ola

NASA's Terra satellite captured a picture of Tropical Cyclone Ola on Feb. 1 that showed northeasterly wind shear was pushing the clouds and showers southwest of the center.

On Feb. 1, 2015 at 23:30 UTC (6:30 p.m. EST), the Moderate Resolution Imaging Spectroradiometer or MODIS instrument that flies aboard NASA's Terra satellite captured a visible image of Tropical Cyclone Ola in the South Pacific Ocean when it was just west of New Caledonia. In the image, Ola appeared somewhat elongated from north to south, as vertical wind shear from the northeast pushed the bulk of clouds to the southwest of the storm's center, making it appear more stretched out. Powerful thunderstorms with high cloud tops still surrounded the center of circulation, however, and appeared a bright white in the MODIS image.

Tropical Cyclone Ola formed late in the day on January 30, 2015  in the South Pacific Ocean about 300 nautical miles northwest of Noumea, New Caledonia (near 19.1 south and 162.1 east). Within 24 hours of its birth, Ola's maximum sustained winds increased rapidly from 35 knots (40 mph/62 kph) to 65 knots (75 mph/120 kph) making it a Category 1 hurricane on the Saffir-Simpson Scale.

Ola has been creeping along in the Southern Pacific Ocean, while remaining west of New Caledonia for a couple of days. New Caledonia is an island located 750 miles (1,210 km) east of Queensland, Australia.

On Feb. 2 the center of circulation was parallel to the northern tip of the island. At 0900 UTC (4 a.m. EST), Tropical cyclone Ola was centered near 23.4 south latitude and 161.9 east longitude, about 245 nautical miles (281.9 miles/453.9 km) west-southwest of Noumea, New Caledonia. Ola was moving to the south-southwest at 10 knots (11.5 mph/18.5 kph) and had maximum sustained winds near 65 knots (75 mph/120 kph) making it a Category One hurricane on the Saffir-Simpson hurricane wind scale.  Ola is generating waves up to 18 feet (5.4 meters) high west of northern New Caledonia.

Forecasters at the Joint Typhoon Warning Center noted that the low-level circulation center has become partially exposed due to moderate northeasterly vertical wind shear. Further, that vertical wind shear is forecast to increase as Ola continues in a southerly direction. In addition, the ocean heat content will decrease, so steady weakening is forecast over the next 48 hours when the storm is expected to dissipate.

Rob Gutro
NASA's Goddard Space Flight Center
NASA
Guillermo Gonzalo Sánchez Achutegui
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