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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

ARB 02 Becomes Deep Depression

12.5N 62.1E

December 23rd, 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

As of 0600 UTC, 23 December 2012, Deep Depression ARB 02 was located near latitude 9.0°N and longitude 60.0°E, about 1050 km east-southeast of Ras Binnah 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 55 km/h (35 mph) gusting to 75 km/h (45 mph). Central pressure is estimated at 1002 hPa (mbar). Dvorak intensity of the storm is at T2.0.

Tropical Storm Pakhar (02W) by Vietnam – April 1st, 2012

11.7N 108.2E

April 1st, 2012 Category: Image of the day, Tropical Storms

Tropical Storm Pakhar (02W) - March 30th, 2012

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Track of Tropical Storm Pakhar (02W) - March 31st, 2012 © Univ. of Wisconsin

Track of TS 02W

On March 17, an area of disturbed weather associated with a cold front formed about 300 km (190 mi), to the northwest of Palau Island. At that time, the low pressure area was located in an area of moderate vertical wind shear, with unfavorable water temperature.

Over the next couple of days, it slowly moved towards the Samar area, and crossed the Visayas region. On March 20, the low pressure area remained almost stationary, about 140 km (85 mi) to the northwest of Puerto Princesa, Palawan. The cause of the low’s stalling was due to a high pressure system, that was building up to the northeast of the system, extending into Vietnam. At the same time, the JMA upgraded the storm to a disturbance.

The system remained stationary for more four days, before the JMA upgraded it to a tropical depression. However, on March 25, the JMA downgraded the tropical depression to a disturbance, as the storm’s outer rainbands began to collapse, and its low level circulation center began to be fully exposed.

Early on March 26, the JMA re-upgraded the disturbance to a tropical depression, as the storm began to reorganize. By this time, the depression became well organized, due to low vertical wind shear associated with favorable water temperatures.

During the afternoon of March 27, the tropical depression started to move southwest slowly, due to the weakening of the high pressure system in Vietnam. At the same time, the building of another Subtropical Ridge, located to the northeast of the system, began turning the tropical depression westwards. Simultaneously, the cold front associated with strong northeast monsoon allowed the depression to become more well organized. In addition, water temperatures still under favorable conditions allowed the storm to continue strengthening.

On March 28, JTWC issued a TCFA to the disturbance as its LLCC starts to consolidate more. Early on the next day, the JMA upgraded the tropical depression to a tropical storm and named it Pakhar, because the storm’s convection completely wrapped around the center of circulation. During the next several hours, Pakhar curved towards the northeast, as the storm continued to intensify. At the same time, the JTWC upgraded the disturbance into a tropical depression, and upgraded it to a tropical storm, just a few hours later.

On March 29, Pahkar continued to organize, as the storm slowed down. Early on March 30, the JTWC upgraded Pakhar to a category 1 typhoon. Because of land interaction and colder sea surface temperature, the JTWC downgraded Pakhar to a tropical storm early on March 31.

Pahkar did not make landfall in the Philippines. However, torrential rains and strong winds resulted in heavy traffic, in Metro Manila and nearby provinces. Flooding also occured in different parts of central and southern Luzon, and the northern Visayas region. Landslides were also reported and caused flooding in some provinces. The NDRRMC reported that 2 people drowned, and other 2 people are reported as missing. In Bacolod City at noontime, on March 29 (Philippine Time), 5 cars were destroyed, couple of trees lining up along the streets laid to waste, and business establishments were damaged, near the Universtity of St. La Salle. During the event, 23 people were injured, including one baby girl. Pahkar also spawned a tornado that lasted for 10 minutes.

View of Tropical Cyclone 04A at Peak Intensity

8.8N 55.0E

December 27th, 2012 Category: Tropical Storms

Tropical Depression ARB 02 – December 23rd, 2012

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

Track of TD ARB 02

Deep Depression ARB 02, or Tropical Cyclone 04A, began as a low pressure area over the Arabian Sea on 19 December and was active until 25 December, just off the coast of the Horn of Africa. This image shows the storm while it was near its peak intensity, which included winds of 55 km/h (35 mph) (3-min) and central pressure of 1002 mbar (hPa). No deaths associated with the storm have been reported.

Tropical Cyclone 04A Weakening

9.1N 56.4E

December 25th, 2012 Category: Tropical Storms

Tropical Depression ARB 02 – December 23rd, 2012

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

Track of TD ARB 02

Deep Depression ARB 02, or Tropical Cyclone 04A, began as a low pressure area over the Arabian Sea near 7.3°N and 70.7°E on 19 December. It slowly tracked westwards, organizing itself and intensifying into a Depression by 1100 UTC of 22 December.

The Joint Typhoon Warning Center (JTWC) upgraded the storm into a Tropical Cyclone by 0300 UTC of 23 December, followed by Deep Depression status by the morning hours of the same day. However the storm encountered a strong wind sheer on 24 December, causing its low-level circulation center to fully expose, prompting JTWC to issue the final advisory on the storm. Further weakening ensued, and the IMD downgraded ARB 02 into a low pressure area on 25 December.

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