Aqua satellite passed over the tropical cyclone on
December 5 at 20:17 UTC/3:17 p.m. EST. Strong rising air and thunderstorms
(purple) were building over the low-level circulation center and in a band of
thunderstorms wrapping to the southwest.
Image Credit: NASA JPL, Ed Olsen
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NASA's Aqua satellite provided visible and infrared satellite imagery to
forecasters helping confirm the birth of the sixth tropical cyclone of the
Northern Indian Ocean cyclone season.
Tropical Cyclone 06B, which may be renamed "Madi," organized from low
pressure System 92B today, December 6, when it was about 266 nautical miles/306
miles/492.6 km southeast of Chennai, India. Tropical Cyclone 06B was centered
near 9.8 north latitude and 93.7 west longitude. Its maximum sustained winds
were near 45 knots/51.7 mph/83.3 kph, making it tropical-storm strength. Those
tropical storm force winds extended out 50 nautical miles/57.5 miles/92.6 km
from the center, making the small tropical storm just about 100 nautical
miles/115.1 miles/185.2 km in diameter. 06B was moving to the northwest at 3
knots/3.4 mph/5.5 kph.
NASA's Aqua satellite passed over the tropical cyclone on December 5 at 20:17
UTC/3:17 p.m. EST. Strong rising air (convection) was building over the
low-level circulation center and continued on December 6. AIRS data showed high,
strong, cold thunderstorm cloud top temperatures as cold as -62F/-52C over a
large area around the center and in a band wrapping into the center from the
south.
The forecasters at the Joint Typhoon Warning Center or JTWC expect 06B to
continue strengthening over the next couple of days because it is located in
warm waters.
06B is expected to drift northward because there are no weather systems to
guide it until a low to mid-level subtropical ridge (elongated area) of high
pressure builds up over the eastern Bay of Bengal. Once that happens, the
tropical cyclone is expected to curve to the north-northeast.
JTWC forecasters also expect that 06B will briefly reach cyclone/hurricane
strength sometime on December 9 as it parallels the coast of east-central India
while remaining far off-shore.
Text credit: Rob Gutro
NASA's Goddard Space Flight Center
NASA's Goddard Space Flight Center
Dec. 05, 2013 - NASA Eyes Another Developing Depression in Northern Indian Ocean
NASA's Aqua satellite passed over System 92B on
Dec. 5 at 2:59 a.m. EST. Aqua's AIRS instrument data showed a large area of
strong convection and high, cold (purple) thunderstorm cloud tops north and east
of the center.
Image Credit: NASA JPL, Ed Olsen
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The Northern Indian Ocean typhoon season usually lasts until the end of
December, but it's not going out without a fight this year. Infrared satellite
data from 92B (Northern Indian Ocean)92B (Northern Indian Ocean)showed bands of thunderstorms wrapping around
low pressure System 92B's center. If this system develops it would become
Tropical Depression 06B.
NASA's Aqua satellite passed over the low pressure area designated as System
92B on Dec. 5 at 07:59 UTC/2:59 a.m. EST and the Atmospheric Infrared Sounder or
AIRS instrument captured infrared data about the developing storm. AIRS data
showed a large area of strong convection and high, cold thunderstorm cloud tops
north and east of the center of circulation.At the time of the AIRS image, the western-most edge of the low covered most of the island nation of Sri Lanka where it brought rain. AIRS data showed bands of thunderstorms also wrapping into the center from the west and south. The circulation appears to be consolidating today, December 5.
At 1500 UTC/10 a.m. EDT on December 5, System 92B as centered near 9.8 north and 84. 0 east, about 293 nautical miles southeast of Chennai, India. Winds in the area were estimated to be 25 to 30 knots/28.7 to 34.5 mph/46.3 to 55.5 kph. Satellite data indicated that the strongest winds were in the northern half of the low. The low pressure area is moving north-northeastward at 6 knots/6.9 mph/11.1 kph.
The low-level center of the system lies to the south of a subtropical ridge (elongated area) of high pressure, which is providing good outflow, but is also causing vertical wind shear, which is inhibiting the development.
The Joint Typhoon Warning Center expects this low pressure area to become a tropical depression and curve away from India. It is expected to move in a northeasterly direction toward the center of the Bay of Bengal.
Text credit: Rob Gutro
NASA's Goddard Space Flight Center
NASA
Guillermo Gonzalo Sánchez Achutegui
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