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Tropical Depression Tim (20P) Expected to Return to Australia Coast – March 14th, 2013

14.9S 139.7E

March 14th, 2013 Category: Image of the day, Tropical Storms

Tropical Depression Tim (20p) – March 13th, 2013

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Track of Tropical Depression Tim (20p) - March 13th, 2013 © Univ. of Wisconsin

Track of TC 20P

Tropical Depression Tim (20P) is tracking southeastward under the influence of the mid-level NER to the north. After TAU 36, this steering mechanism is expected to weaken and be gradually replaced by a deep layer subtropical ridge (STR) to the southeast, which is expected to build in behind Tropical Cyclone Sandra (19P).

Storm motion will slow as the steering transition takes place, allowing for further intensification, to a peak of 75 knots. Around TAU 72, the building STR will deflect Tim westward, back toward the Australian coast. Increasing VWS after TAU 72 should start to gradually weaken the system. Maximum significant wave height is 12 feet.

Tropical Depression Tim (20P) Forms Off Coast of Australia

15S 140.9E

March 14th, 2013 Category: Tropical Storms

Tropical Depression Tim (20p) – March 12th, 2013

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Track of Tropical Depression Tim (20p) - March 13th, 2013 © Univ. of Wisconsin

Track of TC 20P

Tropical Depression Tim (20P), located approximately 240 nm north-northeast of Cairns, Australia, has tracked southeastward at 13 knots over the past six hours.

Animated enhanced infrared imagery depicts deep convection wrapping into a consolidating low level circulation center (LLCC). A mosaic of recent microwave satellite imagery reveals a hook of deep convection forming along the southern and western peripheries, further verifying the improved wrapping of convection around the LLCC.

The current position is based on fixes from PGTW, KNES, and ABRF, as well as an extrapolation from an AMSU image, with fair confidence. The initial intensity is assessed at 35 knots based on Dvorak estimates from PGTW and ABRF, as well as an OSCAT pass which revealed 30 knot winds.

Upper air analysis indicates TD 20P is south of a near equatorial ridge (NER) axis, providing good speed and directional divergence to promote outflow. Some data suggests a point source is forming overhead. The vertical wind shear (VWS) is currently moderate, at 15-20 knots.

Sonamu (01W) Downgraded to Tropical Depression

8.4N 109.2E

January 8th, 2013 Category: Tropical Storms

Tropical Storm 01W – January 7th, 2013

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Track of Tropical Storm 01W - January 7th, 2013 © Univ. of Wisconsin

Track of TS 01W

Tropical Storm Sonamu (01W) has been downgraded to a tropical depression. The system is located approximately 290 nautical miles south-southeast of Ho Chi Minh City, Vietnam, has tracked southwestward at 4 knots over the past six hours. Maximum significant wave height is 14 feet.

Tropical Depression ARB 02 West of India

10.4N 62.1E

December 22nd, 2012 Category: Tropical Storms

Tropical Depression ARB 02 – December 21st, 2012

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Track of Tropical Depression ARB 02 - December 22nd, 2012 © Univ. of Wisconsin

Track of TD ARB 02

A low pressure area formed over the Arabian Sea near 7.3°N and 70.7°E on 19 December.

It slowly tracked westwards, organizing itslef and intensifying into a Depression by 1100 UTC of 22 December. Here, it can be seen west of the southern tip of India.

As of 1300 UTC, 22 December 2012, Depression ARB 02 was located near latitude 9.0°N and longitude 62.5°E, about 1150 km west-southwest of Aminidivi and 1000 km southeast of Socotra Island. The storm is forecast to intensify further and move westwards towards the Somalia coast in the next 72 hours. Maximum sustained winds are at 45 km/h (30 mph) gusting to 65 km/h (40 mph). Central pressure is estimated at 1004 hPa (mbar). Dvorak intensity of the storm is at T1.5

Bopha (26W) Weakens to Tropical Depression

12.7N 116.9E

December 9th, 2012 Category: Tropical Storms

Typhoon Bopha (26W) – December 7th, 2012

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Typhoon Bopha (26W) - December 8th, 2012 © Univ. of Wisconsin

Track of TY 26W

Tropical Depression Bopha (TD 26W) located approximately 240 nm north-northwest of Manila, Philippines, has tracked northeastward at 03 knots over the past six hours. Maximum significant wave height is 20 feet.

The system has rapidly dissipated due to strong (40-50 knots) westerly vertical wind shear. It has winds of approximately 35 knots associated with a northeasterly monsoon surge, and winds of 25 knots or less directly
associated with the low level circulation. The system will dissipate within 24 hours.

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