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Hurricane Season 2008: 03S (Indian Ocean)
 
Nov. 21, 2008

Tropical Storm Anika and Tropical Cyclone 03S Both Fading

AIRS image of Anika and O3S on November 21, 2008> Larger image
Credit: NASA JPL
This weekend is a killer for tropical cyclones in the Indian Ocean. Both Tropical Storm Anika and Tropical Cyclone 03S are both meeting their end over the weekend of Nov. 22-23.

Anika be a tropical storm on Friday, Nov. 21, but by Saturday, Nov. 22, when the storm is expected to make landfall north of Port Headland, Australia, it will quickly weaken into a remnant low pressure area.

Meanwhile, on Nov. 21-22, Tropical Cyclone 03S is fading in the same area. 03S is passing south of the Cocos Islands, located south of the Isle of Java. That puts 03S to the northwest of where Anika is located.

Where is Anika?

On Nov. 20 at 21:00 Zulu Time (4:00 p.m. EST), the Joint Typhoon Warning Center issued its final advisory on Anika. At that time, Anika had sustained winds near 35 knots (40 mph) that were quickly waning. Anika was 650 miles northwest of Learmonth, a city in northwestern Australia. It was near 15.5 degrees south latitude and 105.7 degrees east longitude and moving southeastward near 13 knots (15 mph). It will continue moving in that direction until it makes landfall this weekend. Anika continues to deal with strong vertical wind shear (winds blowing in different directions at different levels of the atmosphere that tear a storm apart) and cooler sea surface temperatures. Ocean waters of at least 80 degrees Fahrenheit are needed to power tropical cyclones.

Where is Tropical Cyclone 03S?

Tropical Cyclone 03S formed behind Anika, which was also called Tropical Cyclone 02S, and is following Anika's path. That's not good news for keeping 03S alive, because the conditions Anika are in are unfavorable, and include cooler sea surface temperatures and wind shear. That explains why Tropical Cyclone 03S is fading, too.

On Nov. 20 at 21:00 Zulu Time (4:00 p.m. EST), the Joint Typhoon Warning Center issued its final advisory on 03S. At that time, it has maximum sustained winds near 25 knots (29 mph). It was about 620 miles west of Cocos Island, moving near 27 knots (31 mph). 03S will fade over the weekend of Nov. 22-23 at sea.

NASA's Aqua Satellite Captures Both Storms

NASA's Atmospheric Infrared Sounder (AIRS) instrument on NASA's Aqua satellite captured this visible image of both 03S (located in the top left corner of the image), and Anika, located in the left center of the image). The eastern-most part of Tropical Cyclone 03S is on the left top edge of this satellite image, while most of Anika is clearly visible from this satellite overpass. Both storms will have faded away by Monday, Nov. 24.

Text Credit: Rob Gutro/NASA's Goddard Space Flight Center