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Tropical Depression Huaning (06W)

July 14th, 2009 Category: Tropical Storms

Tropical Depression 06W - July 13th, 2009

Tropical Depression 06W - July 13th, 2009

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Track TD 06W - July 13th, 2009 © Univ. of Wisconsin

Track TD 06W - July 13th, 2009

Tropical Depression Huaning (06W), located approximately 135 nautical miles south of Taipei, Taiwan, has tracked west-northwestward at 13 knots over the past 6 hours.

Animated multispectral and radar based imagery
indicates that TD 06W has made landfall in Taiwan and is tracking across southern Taiwan.

Increased convection has developed over the past 6 hours, mostly from terrain-enduced lifting as the system moves over the mountainous costal region of Taiwan.

Its northern and western rain bands are now spreading across Taiwan, while its southern rain bands are affecting extreme northern Luzon, particularly the Batanes Group of islands.

Moderate to heavy rains with winds, squalls and thunderstorms can be expected, with 1-day rainfall accumulations of 150 up to 250 mm along the storm’s rain bands.

Residents in low-lying areas and steep slopes must remain alert and seek evacuation for possible life-threatening flash floods, mudslides and landslides due to the anticipated heavy rains brought about by this system.

Current track speed will take the system into the Taiwan Strait within the next 12 hours, briefly causing an increase in intensity. This will be short-lived as the system moves into mainland China, quickly dissipating as it tracks over land.

Surface to mid-level ridging to the northeast of TD 06W is the primary steering influence and will cause the system to track more northward beyond TAU 12. Maximum significant wave height is 9 feet.

Mountains and Valleys of Luzon, Philippines

March 26th, 2009 Category: Snapshots

Philippines - March 22nd, 2009

Philippines - March 22nd, 2009

Luzon is the largest and most economically and politically important island in the Philippines and one of the three island groups in the country. As an island group, it includes the island of Luzon itself, plus the Batanes and Babuyan groups of islands to the north, and the main and outlying islands of Catanduanes, Marinduque, Masbate, Romblon, and Mindoro in the south.

Luzon’s area is 104,688 square kilometers, making it the world’s 15th largest island. It is the fifth most populous island in the world. Located on Luzon are the country’s capital, Manila, and its most populous city, Quezon City.

To the west of Luzon island is the South China Sea (Luzon Sea in Philippine territorial waters), to the east is the Philippine Sea, and to the north is Luzon Strait containing Babuyan Channel and Balintang Channel.

The main part of the island is roughly rectangular in shape and has the long Bicol Peninsula protruding to the southeast. The northern part of the island contains the largest mountain range in the country, the Cordillera Central, where Mount Pulag, the second highest mountain in the country at 2,922 meters, is located.

To the east of the Cordillera Central is the large Cagayan Valley. To the east of the valley rises the Sierra Madre mountain range, easily the longest range in the country, which snakes southwards into the central and southern part of the island. Between it and the Zambales Mountains to the west is the largest plain, the Central Luzon plain. This plain, approximately 11,000 km² in size, is the country’s largest producer of rice.

The largest lake in the country, and also the largest inland lake in Southeast Asia, the Laguna de Bay (Old Spanish, Lake of Bay town). Its size and green waters make it easily identifiable towards the southern part of the island.

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