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Chan-Hom Weakens to Tropical Depression after Pummelling Philippines

May 11th, 2009 Category: Tropical Cyclones

Tropical Depression 02W (Chan-Hom) - May 10th, 2009

Tropical Depression 02W (Chan-Hom) - May 10th, 2009

Track of TD 02W - May 11th, 2009

Track of TD 02W

Chan-Hom (02W), which has weakened to a tropical depression, has tracked northwestward at 4 knots over the past six hours.

It now located approximately 265 nautical miles south of Okinawa, Japan, after ravaging the northern Philippines last week.

The National Disaster Coordinating Council (NDCC) said 13 people were missing and more than 160,000 were adversely affected when Chan-Hom pummelled more than 30 northern provinces beginning on May 7th.

The death toll from the storm has reached 43 people; the majority of which drowned in swollen rivers or were buried in landslides, reports the Asia-Pacific News.

Most of the casualties occured in Pangasinan and Ifugao, the provinces hit hardest by the storm. At least 21 people were killed in Pangasinan, while 16 fatalities were reported in Ifugao.

The agency said damage to agriculture and infrastructure was estimated at 781.70 million pesos (16.28 million dollars) and could go up as rescuers reached areas isolated by the typhoon.

The NDCC added that power has been restored in most of the areas hit by the typhoon, although some rivers remained swollen and roads impassable.

Since moving past the Philippines, animated multispectral imagery indicates the fully exposed low level circulation center (LLCC) has significantly elongated. Remnant convection to the northeast has been further reduced and sheared, and is now over 90 nm detached to the east.

TD 02W enhanced image - May 10th, 2009

TD 02W enhanced image - May 10th, 2009

TD 02W multispectral imagery - May 11th, 2009 © JTWC

multispectral imagery - May 11th, 2009

Environmental analysis indicates TD02W is under moderate to strong vertical wind shear (VWS) and is tracking over cooling sea surface temperatures (SST) below 25 celsius. Maximum significant wave height 10 feet.

Chan-hom is expected to move very slowly north along the western edge of a low level ridge (or become quasi-stationary) then dissipate by TAU 12.

Chan-Hom (02W) Hits Northern Philippines

May 8th, 2009 Category: Tropical Cyclones

Track of Tropical Storm 02W (Chan-Hom) - May 8th, 2009

Track of Tropical Storm 02W (Chan-Hom) - May 8th, 2009

TS 02W © JTWC

TS 02W

Chan-Hom (02W) has been downgraded from a typhoon to a tropical storm. It is now located approximately 275 nautical miles northeast of Manila, Philippines, after tracking east-northeastward at 14 knots over the past six hours. Maximum significant wave height is 10 feet.

Before losing strength, Chan-Hom pummelled the northern Philippines, hitting the northern province of Pangasinan late Thursday with maximum winds of 150 kilometres per hour and gusts of up to 185 kph.

Aat least five people were killed in landslides, by drowning and in other accidents, reported disaster relief officials, and others were injured or have been reported missing. The typhoon also caused blackouts and damage to buildings.

Chan-Hom struck the Philippines a few days after typhoon Kujira battered eastern provinces, killing 27 people and damaging more than 9 million dollars worth of crops, livestock and fisheries.

According to the Weather Bureau, Chan-Hom weakened as it made landfall and continued to move north-east at 15 kph. Its maximum winds dropped to 95 kph and gusts of up to 120 kph.

Recent animated multispectral imagery shows a poorly organized low level circulation center (LLCC) with deep convection sheared towards the East with a strong poleward outflow channel. An AMSU-B image shows a well defined LLCC with deep convective banding far to the East of the center.

Upper level analysis indicates the system is in an area of moderate to high vertical wind shear and to the north of the upper-level subtropical ridge axis. Chan-Hom is currently under the steering influence of a low- to mid-level near-equatorial ridge to the Southeast.

The system is expected to come under the influence of a low-level midlatitude ridge to the northeast after TAU 24. The system will then start to track to the north under the new influence and is expected to be out of the Philippines by Sunday.

Chan-Hom (02W) Upgraded to Typhoon Status

11.1N 116.7E

May 7th, 2009 Category: Tropical Cyclones

Track of Typhoon 02W (Chan-Hom) - May 7th, 2009 © Univ. of Wisconsin

Track of Typhoon 02W (Chan-Hom) - May 7th, 2009

TY 02W © JTWC

TY 02W

Chan-Hom has been upgraded from tropical storm to typhoon status.

It is located in the South China Sea approximately 150 nm west-
northwest of Manila, Philippines, after tracking east-northeastward at 10 knots over the past six hours.

Recent animated multispectral imagery shows a well defined circulation with convective banding biased to the east of the center.

Infrared imagery indicates a depression in the clouds over the low level circulation center(LLCC).

An AMSU-B image shows a broken ring of deep convection with convective bands wrapping into the North, East and South of the system.

Animated water vapor imagery shows well formed dual channel outflow to the Northeast and Southwest.

Upper level analysis shows that the system is moving into an area of increased vertical windshear and near an area of upper-level diffluence.

Maximum significant wave height is 18 feet. Sea surface temperatures remain favorable for further development, but the systems proximity to land will quickly impact its ability to sustain itself.

Tropical Storm 02W (Chan-Hom) Expected to Make Landfall

May 6th, 2009 Category: Tropical Cyclones

Tropical Storm 02W - May 5th, 2009

Tropical Storm 02W - May 5th, 2009

TS 02W - enhanced image

TS 02W - enhanced image

Track of TS 02W © Univ. of Wisconsin

Track of TS 02W

Tropical Storm 02W (Chan-Hom), located approximately 400 nautical miles west of Manila, Philippines, has tracked northeastward at 6 knots over the past six hours. Maximum significant wave height is 19 feet.

Animated water vapor imagery indicates the system has maintained its ragged symmetry over the past 12 hours.

Upper level analysis indicates TS 02W is tracking along the north-west periphery of a mid-level near-equatorial ridge to the Southeast.

The cyclone is also exhibiting good radial outflow as it tracks along an area of low vertical wind shear.
Chan-Hom is expected to slowly intensify and begin tracking on a more eastward direction towards northern Luzon over the next 24 to 48 hours.

After TAU 48, TS 02W will make landfall just north of the Gulf of Lingayen, cross into Luzon and dissipate just off the northeastern point.

An alternate scenario is for the system to turn north towards Taiwan around TAU 48, as suggested by a few guidance models, although this scenario is less likely at this time.

Tropical Storm 03W Forms in South China Sea After 5-Week “Break”

15.9N 114.3E

June 18th, 2009 Category: Tropical Storms

Tropical Storm 03W - June 18th, 2009

Tropical Storm 03W - June 18th, 2009

TS03W - enhanced image

TS03W - enhanced image

Track of TS03W © Univ. of Wisconsin

Track of TS03W

Following five weeks of hiatus since Typhoon Chan-Hom, a tropical storm has taken shape over the South China Sea off the northern Philippines.

Tropical Storm Three (03W) formed on Wednesday, local time, west of northern Luzon Island and about 300 miles south-southeast of Hong Kong.

It is currently located approximately 336 nautical miles southwest of Kaohsiung, Taiwan, after tracking east-northeastward at 2 knots over the past six hours.

Tropical Storm 03W will loiter nearly stationary for a day or two over the open South China Sea before tracking towards the northeast between Philippines and Taiwan.

Maximum significant wave height is currently 11 feet. Weather impact likely will be greatest over northwestern Luzon Island, Philippines, where flooding rain could fall between Thursday and Saturday.

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