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Tropical Storm Nesat (20W) Near Vietnam

16.9N 107.8E

September 30th, 2011 Category: Tropical Storms

Tropical Storm Nesat (20W) - September 30th, 2011

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Track of Tropical Storm Nesat (20W) - September 30th, 2011 © Univ. of Wisconsin

Track of TS 20W

Tropical Storm Nesat (20W), located approximately 25 nm north-northeast of Hanoi, Vietnam, has tracked west-northwestward at 07 knots over the past six hours.

Animated infrared satellite imagery depicts rapidly decaying deep convection due to land interaction.
However, an SSMIS image continues to depict a well-defined, but shallow low-level circulation center (LLCC).

The current intensity is assessed at 45 knots. Sustained surface winds reported at Hanoi are only 10-15 knots with SLP near 1004 mb.

TS 20W is forecast to continue tracking west-northwestward and should dissipate between TAU 12 and TAU 24. This track is supported by the dynamic model guidance. The system will be closely monitored for signs of regeneration.

Tropical Storm Nesat (20W) Expected to Reach Typhoon Strength, Make Landfall Over Luzon – September 24th, 2011

12.8N 128.4E

September 24th, 2011 Category: Image of the day, Tropical Storms

Tropical Storm Nesat (20W) - September 24th, 2011

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Track of Tropical Storm Nesat (20W) - September 24th, 2011 © Univ. of Wisconsin

Track of TS 20W

As of 18:45 UTC September 24, Tropical Storm Nesat was located within 30 nautical miles of 15.0°N 132.0°E, about 730 nmi (1,350 km; 840 mi) east of Manila, Philippines.

Maximum sustained winds are 45 knots (83 km/h; 52 mph), gusting to 65 knots (120 km/h; 75 mph). Minimum central pressure is 990 mbar (hPa; 29.23 InHg), and the system is moving west at 16 knots (30 km/h; 18 mph).

Nesat is now a weak storm. However, it is expected to strengthen and become a typhoon before making landfall over northern Luzon. The area of 30 kt winds or more ranges upto 280 km (170 mi) from the center to the northeast side and 220 km (140 mi) from the center to the southwest side.

Nalgae (22W) Second Typhoon to Pummel Philippines in One Week

17.3N 116.9E

October 1st, 2011 Category: Tropical Cyclones

Typhoon Nalgae (22W) - October 1st, 2011

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Track of Track of Typhoon Nalgae (22W) - October 1st, 2011 © Univ. of Wisconsin

Track of TY 22W

Typhoon Nalgae (22W), located approximately 155 nm northwest of Manila, Philippines, has tracked westward at 19 knots over the past six hours. Maximum significant wave height is 20 feet.
Nalgae, the second typhoon (after Typhoon Nesat 20W) to hit Philippines within one week, made landfall along the coast of Dinapigue town in Isabela province. The PAGASA weather bureau has announced that the ground is still supersaturated and cannot absorb more water, meaning it will flow down to rivers and towns, and that there is a big possibility that landslides, flooding and flash floods could occur.

The search and rescue operations for Typhoon Nesat were halted because of the fierce weather brought by Nalgae. Nalgae was making a similar path across the saturated Luzon Island as Typhoon Nesat. The wind gusts brought by Nalgae toppled trees and blew away tin roofs of some houses in Isabela’s provincial capital of Ilagan. Nalgae continued to worsen the flooding and destruction brought by Nesat. Nalgae was far more stronger than Nesat and plummeted the nation with more winds and rains.

Also, PAGASA announced that an estimated 10-18 mm per hour of rains were experienced in several areas across the nation filling up dams and causing river systems to swell. As the storm continued to move inland with strong winds, many structures including billboards, tarpaulins and wooden materials in the town of Cauayan were damaged. The barriers of the Isabela highway were also destroyed by the typhoon.
According to the National Disaster Risk Reduction and Management Council (NDDRMC), the onslaught of the typhoon resulted in the death of 1 person living in the Mountain Province, a landlocked province of the Philippines in the Cordillera Administrative Region in Luzon.

Tropical Depression Twenty-one (21W) East of Vietnam

September 24th, 2011 Category: Tropical Storms

Tropical Depression Twenty-one (21W) - September 24th, 2011

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Track of Tropical Depression Twenty-one (21W) - September 24th, 2011 © Univ. of Wisconsin

Track of TS 21W

On the evening of September 21, at almost the same time when Tropical Storm Nesat (20W) was first seen, another low pressure area persisted far south of Hong Kong.

The low slowly drifted north and strengthened slowly until on September 24, when the JMA upgraded the system to a tropical depression east of Vietnam, Tropical Depression Twenty-one (21W).

Later that day, the JTWC issued a Tropical Cyclone Formation Alert stating that the low could develop into a tropical cyclone.

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