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Hurricane Season 2012: Tropical Storm Damrey (Western North Pacific Ocean)
8.03.12
 
AIRS captured this infrared image of Tropical Storms Damrey and Saola and Tropical Depression Haikui NASA's Aqua satellite captured this infrared image of Tropical Storm Damrey dissipating in China. Click the picture above to see a larger image showing all three storms.
Credit: NASA JPL/Ed Olsen
NASA Sees Triple Tropical Trouble in Northwestern Pacific

NASA's Aqua satellite captured an image of a very busy northwestern Pacific Ocean where three tropical cyclones are active. Tropical Storms Damrey and Saola are dissipating in China, while Tropical depression Haikui developed on August 3, 2012.

NASA's Aqua satellite passed over the northwestern Pacific Ocean on August 3 at 0453 UTC (12:53 a.m. EDT) and the Atmospheric Infrared Sounder (AIRS) instrument captured all three tropical cyclones in one image. AIRS observes in infrared light, which basically provides temperature information. In respect to tropical cyclones, the higher the thunderstorms (they're made up of hundreds of thunderstorms), the colder the clouds and stronger the thunderstorms.

AIRS data showed that cloud top temperatures in Damrey and Saola were warming, while Haikui had a large area of cooling cloud top temperatures. As Damrey made landfall north of Shanghai, China, it was cut off from its power source of warm water, so there was less water vapor to feed into the storm, and the uplift of air weakened (stronger uplift creates clouds and thunderstorms), so the cloud heights fell, and the cloud top temperatures warmed. The same thing occurred in Tropical Storm Saola when it made landfall south of Shanghai. Both storms appeared as tight, rounded areas over land in the AIRS image.

The AIRS image caught the western edge of Tropical Depression Haikui, and it showed a large area of very cold cloud top temperatures, indicating a lot of strength in uplift and strong, high thunderstorms. A good portion of Haikui's cloud top temperatures were as cold as -63 Fahrenheit (-52 Celsius). Those strong storms are indicative of areas where heavy rain is falling. Satellite imagery revealed that the low-level circulation center is partly exposed. There is also a fragmented, banding of thunderstorms wrapping from the northeast quadrant into the northwest quadrant of the storm.

The final warning for Tropical Storm Damrey was issued on August 2 at 2100 UTC, or 5 p.m. EDT. At that time, Damrey had already made landfall north of Shanghai, China, and was about 325 miles (374 miles/602 km) south-southeast of Beijing near 35.0 North latitude and 119.2 East longitude. Damrey's winds were still near 55 knots (63.2 mph/102 kmh) after landfall, but weakening as it moved in a west-northwest direction. Damrey's remnants are expected to dissipate today, August 3.

The final warning on Tropical Storm Saola came today, August 3 at 0300 UTC (Aug. 2 at 11 p.m. EDT) from the Joint Typhoon Warning Center. Saola had already made landfall south of Shanghai and north of Fuzhou, China, and is dissipating inland. At that time, it was centered near 27.0 North latitude and 119.3 East longitude. Saola's maximum sustained winds were less than Damrey's and near 35 knots (40 mph/65 kmh). Saola was also moving faster than Damrey (located to the north) at 14 knots (16 mph/26 kmh). Saola is expected to dissipate today or on August 4.

Out over the open waters of the northwestern Pacific Ocean, newborn Tropical Depression Haikui was getting organized. On August 3 at 1500 UTC (11 a.m. EDT) Haikui's maximum sustained winds were near 30 knots 34.5 mph/55.5 kmh). It was located 580 nautical miles east of Kadena Air Base, Okinawa, Japan, and is moving to the west-northwest at 13 knots (~15 mph/24 kmh). The Joint Typhoon Warning Center forecast calls for Haikui to pass just north of Kadena Air Base on August 5 and slowly intensify.

Text Credit: Rob Gutro
NASA Goddard Space Flight Center, Greenbelt, Md.



Aug. 2, 2012

MODIS captured a visible image on August 2, 2012 showing the southern arm of Damrey feeding into the northern arm of Saola › View larger image
NASA's Terra satellite passed over both tropical cyclones and captured them in one image, using the Moderate Resolution Imaging Spectroradiometer (MODIS) instrument onboard.
Credit: NASA Goddard MODIS Rapid Response Team
AIRS captured a look at Tropical Storm Saola and Typhoon Damrey's cloud top temperatures on August 1, 2012 › View larger image
NASA's Aqua satellite captured a look at Tropical Storm Saola and Typhoon Damrey's cloud top temperatures on August 1, 2012 at 1:23 p.m. EDT. Coldest cloud top temperatures (purple) were as cold as or colder than -63 Fahrenheit (-52 Celsius), indicating strong thunderstorms with the potential for heavy rainfall.
Credit: NASA JPL, Ed Olsen
NASA Satellites See Tropical Storm Saola and Typhoon Damrey Arm-in-Arm Near China

Tropical Storm Saola and Typhoon Damrey appear on NASA satellite imagery to be arm-in-arm as they enter China on August 2.

NASA's Terra satellite passed over both tropical cyclones and captured them in one image, using the Moderate Resolution Imaging Spectroradiometer (MODIS) instrument onboard. MODIS captured a visible image on August 2, 2012 at 0245 UTC that showed the southern extent (or arm) of Typhoon Damrey, making landfall north of Shanghai, feeding into the northern extent (or arm) of Tropical Storm Saola, making landfall south of Shanghai. MODIS imagery also showed that Damrey developed an eye about 20 nautical miles (23 miles/27 km) wide, while Saola's eye had closed because of its interaction with the land of Taiwan.

On August 2 at 0900 UTC (5 a.m. EDT), Typhoon Damrey was 160 nautical miles (184 miles/296 km) north-northeast of Shanghai, China, near 34.1 North latitude and 121.4 East longitude. Damrey's maximum sustained winds were near 75 knots (86.3 mph/138.9 kmh). Damrey continues moving west-northwest at 21 knots (24.1 mph/38.8 kmh). Cooling sea surface temperatures are expected to weaken Damrey as it nears the coast, but residents should be prepared for heavy rainfall, typhoon-force wind gusts, and rough surf.

The Central Weather Bureau of Taiwan has Sea and Land Warnings in effect today as Tropical Storm Saola continues moving west toward China and off the island. Sea Warning Areas include: the Sea of North Taiwan, Sea of Northeast Taiwan, Sea of Southeast Taiwan, North Taiwan Strait, and South Taiwan Strait. The Land Warning Area includes: Taipei City, New Taipei City, Keelung, Yilan County, Taoyuan County, Hsinchu County, Hsinchu City, Miaoli County, Taichung City, Changhua County, Nantou County, Yunlin County, Chiayi County, Chiayi City, Hualien County, Lienchiang County. For updated warnings in Taiwan, visit: http://www.cwb.gov.tw/V7e/prevent/warning/w40.htm.

On August 2 at 0900 UTC (5 a.m. EDT), Tropical Storm Saola, called "Gener" in the Philippines, was just 10 nautical miles (11.5 miles/18.5 km) northeast of Taipei, Taiwan, near 25.6 North latitude and 121.3 East longitude. Saola's maximum sustained winds were near 50 knots (57.5 mph/92.6 kmh). Damrey continues moving north-northwest at 11 knots (12.6 mph/20.3 kmh). Usually when a tropical cyclone moves over land and is cut off from its "power supply" of warm ocean waters, as well as encountering the friction created as it moves over land.

Both systems are expected to dissipate within two days of making landfall.

For a high-resolution MODIS image: http://lance-modis.eosdis.nasa.gov/cgi-bin/imagery/single.cgi?image=Saola_Damrey.A2012215.0245.2km.jpg.

Text Credit: Rob Gutro
NASA Goddard Space Flight Center, Greenbelt, Md.



Aug. 1, 2012

MODIS captured this image of Saola approaching Taiwan, and Damrey approaching southern Japan on August 1 › View larger image
The MODIS instrument on NASA's Terra satellite captured this image of Typhoon Saola approaching Taiwan, and Typhoon Damrey approaching southern Japan on August 1 at 0200 UTC (July 31 at 10:00 p.m. EDT.)
Credit: NASA Goddard/MODIS Rapid Response Team
AIRS showed that strongest, highest, coldest cloud tops of thunderstorms (purple) appeared north and east of Damrey's center. ›View larger image NASA's Aqua satellite passed over Typhoon Damrey on July 31 at 1629 UTC (12:29 p.m. EDT) and the AIRS instrument captured an infrared image of the storm. It showed that strongest, highest, coldest cloud tops of thunderstorms (purple) appeared north and east of the center.
Credit: NASA JPL, Ed Olsen
NASA Sees Twin Typhoons Headed for Double China Landfall

NASA's Terra satellite captured two tropical cyclones on visible imagery today, August 1 as they head for landfall. Typhoon Saola is approaching Taiwan and Typhoon Damrey approaching southern Japan, are both headed for landfall in China. Saola is forecast to landfall south of Shanghai on August 3, while Damrey is forecast to make landfall north of Shanghai on August 2.

NASA satellites have been tracking the twin tropical troublemakers, providing forecasters at the Joint Typhoon Warning Center with visible, infrared and microwave imagery. The Moderate Resolution Imaging Spectroradiometer (MODIS) instrument on NASA's Terra satellite captured an image of Typhoon Saola approaching Taiwan, and Typhoon Damrey approaching southern Japan on August 1 at 0200 UTC (July 31 at 10:00 p.m. EDT). Saola appeared much larger than the less intense Damrey. Saola also has an eye, although it was obscured by high clouds in the MODIS image.

On August 1 at 1500 UTC (11 a.m. EDT) Typhoon Damrey had maximum sustained winds near 65 knots (75 mph/120.4 kmh). It was centered 175 nautical miles (201.4 miles/324.1 km) southeast of Jeju-Do, Korea, near 31.3 North and 127.7 East. Damrey is moving to the west-northwest at 15 knots (17.2 mph/27.7 kmh). The Joint Typhoon Warning Center noted today, August 1, "Infrared satellite imagery shows that there was persistent and deep spiral band convection over the low-level circulation center." Damrey is expected to weaken by Thursday, August 2 when it travels through an area of cooler sea surface temperatures off the coast of Shanghai, just before it makes landfall.

On August 1 at 1500 UTC (11 a.m. EDT) Saola had maximum sustained winds near 90 knots (103.6 mph/166.7 kmh). Saola was centered 100 nautical miles (115.1 miles/185.2 km) southeast of Taipei, Taiwan near 24.2 North and 122.8 East. Saola is moving slowly to the north-northwest at 5 knots (5.7 mph/9.2 kmh). The Joint Typhoon Warning Center noted "satellite imagery shows deep convective banding continues to build around the low-level circulation center." The strongest thunderstorms were located north of the center of circulation.

Warnings for Saola are still in effect in the Philippines and are currently in effect in Taiwan. In the Philippines, Public storm warning signal #1 is in effect for the provinces of Apayao and Cagayan in Luzon. Public storm warning signal #2 is in effect for the groups of islands of Batanes, Calayan and Babuyan.

In Taiwan, the cities of Taipei, New Taipei, Taichung, Chiavi, Tainan, Keelung, Hsinchu, and Kaosiung are under warning. In addition, warnings have been posted for the counties of Changhua, Chiayi, Hsinchu, Hualien, Lienchiang, Miaoli, Nantou, Taoyuan, Taitung, Yilan, and Yunlin.

Typhoon Saola is in an area more favorable for strengthening than Damrey, because sea surface temperatures around Saola are warmer than where Damrey is located. Because of the warmer sea surface temperatures and improving upper atmospheric conditions, forecasters at the Joint Typhoon Warning Center expect Saola to continue intensifying over the next day before interacting with land and weakening. Saola is expected to make landfall south of Shanghai on August 3.

For an unlabeled, high-resolution MODIS image of the storms, visit: http://lance-modis.eosdis.nasa.gov/cgi-bin/imagery/single.cgi?image=Saola_Damrey.A2012214.0200.2km.jpg.

Text Credit: Rob Gutro
NASA Goddard Space Flight Center, Greenbelt, Md.



July 31, 2012

MODIS passed over Damrey on July 31, 2012 and captured a visible image of the storm. › View larger image
NASA's Terra satellite passed over Tropical Storm Damrey on July 31, 2012 at 0115 UTC and captured a visible image of the storm. It had the signature comma shape of a strong tropical storm. Japan's Kyushu province is seen to the left of the image.
Credit: NASA/NRL
AIRS shows Damrey's cloud top temperatures as cold as or colder than -63 Fahrenheit indicating strong thunderstorms › View larger image
NASA's Aqua satellite captured a look at Tropical Storm Damrey's cloud top temperatures on July 31, 2012 at 12:23 a.m. EDT. Coldest cloud top temperatures (purple) were as cold as or colder than -63 Fahrenheit (-52 Celsius), indicating strong thunderstorms with the potential for heavy rainfall.
Credit: NASA JPL, Ed Olsen
NASA Satellite See Tropical Storm Damrey Move Toward Japan's Kyushu Island

Tropical Storm Damrey is the second tropical cyclone to affect Japan's Kyushu island in two weeks, and NASA's Terra satellite imagery revealed the storm had a signature "comma shape" to it upon its approach to the island.

On July 19, several areas of northern Kyushu received heavy rain from Tropical Storm Khanun. Now, just 12 days later, Tropical Storm Damrey is bringing more rain to Kyushu. NASA's Terra satellite passed over Tropical Storm Damrey on July 31, 2012 at 0115 UTC and the Moderate Resolution Imaging Spectroradiometer (MODIS) instrument onboard captured a visible image of the storm. The MODIS image showed that Damrey had the signature comma shape of a strong tropical storm.

On July 31 at 1500 UTC (11 a.m. EDT), Tropical Storm Damrey was 440 nautical miles (506 miles/815 km) east-southeast of Sasebo, Japan, near 29.3 North latitude and 136.1 East longitude. Damrey's maximum sustained winds were near 45 knots (~52 mph/~83 kmh). Damrey continues moving west at 5 knots (5.7 mph/9.2 kmh), so it’s a slow crawl toward Japan. Damrey is causing rough seas ahead of its center, and seas are as high as 20 feet (6 meters).

NASA's Aqua satellite captured a look at Tropical Storm Damrey's cloud top temperatures on July 31, 2012 at 12:23 a.m. EDT. Coldest cloud top temperatures, concentrated around the center of circulation, were as cold as or colder than -63 Fahrenheit (-52 Celsius), indicating strong thunderstorms with the potential for heavy rainfall. Infrared satellite imagery also revealed that Damrey's center is well-defined, and that central convection (rising air that forms the thunderstorms that make up the tropical cyclone) has been re-building around the center.

Forecasters at the Joint Typhoon Warning Center note that "slight intensification may occur as the [low-level center of Damrey] tracks over the very warm sea surface temperatures of the Kuroshio Current and vertical wind shear is [forecast] by the numerical models to remain weak to moderate."

Damrey is expected to make landfall north of Shanghai, China sometime on August 2.

For a high-resolution MODIS image of Tropical Storm Damrey, visit: http://lance-modis.eosdis.nasa.gov/cgi-bin/imagery/single.cgi?image=Damrey.A2012213.0115.1km.jpg.

Text Credit: Rob Gutro
NASA Goddard Space Flight Center, Greenbelt, Md.



July 30, 2012

AIRS capture an infrared image of Damrey on July 29 showing thunderstorms (purple) around the center of circulation. › View larger image
NASA's Aqua satellite passed over Tropical Storm Damrey on July 29 at 11:21 p.m. EDT and the AIRS instrument captured an infrared image of the storm. It showed that strong, high, cold cloud tops of thunderstorms (purple) were in a tight circle around the center of circulation.
Credit: NASA JPL, Ed Olsen
NASA Sees Compact Tropical Storm Damrey Approaching Southern Japan

Tropical Storm Damrey appears to be a compact tropical storm on NASA satellite imagery as it heads west and is expected to pass north of Iwo To, Japan and later south of Kyushu, one of Japan's large islands.

NASA's Aqua satellite passed over Tropical Storm Damrey on July 30 at 03:21 UTC (July 29 at 11:21 p.m. EDT) and the Atmospheric Infrared Sounder (AIRS) instrument captured an infrared image of the storm. It showed that strong, high, cold cloud tops of thunderstorms were in a tight circle around the center of circulation. There were bands of thunderstorms mostly north and east of the center of circulation. Some of the thunderstorm cloud tops were so high that they were as cold as -63 Fahrenheit/-52 Celsius. The circle of thunderstorms appears compact in the infrared imagery.

Damrey formed as a depression on July 28. By July 30, Damrey reached tropical storm status. Damrey's maximum sustained winds were near 45 knots (51.7 mph/83.3 kmh) at 11 a.m. EDT (1500 UTC) on July 30. Tropical-storm-force winds extend out 50 nautical miles (57.5 miles/92.6 km) from the center, making the storm just over 100 miles (115 miles/185 km) in diameter. Damrey was located about 175 nautical miles (201.4 miles/324 km) east-northwest of Iwo To, near 26.3 North and 143.6 East. It is moving to the west-northwest at 5 knots (5.7 mph/9.2 kmh).

Forecasters at the Joint Typhoon Warning Center expect Damrey to track to the west-northwest over the next three days. It is currently expected to strengthen and then weaken before it makes landfall north of Shanghai, China on August 3.

Text Credit: Rob Gutro
NASA Goddard Space Flight Center, Greenbelt, Md.