Hagupit (Northwestern Pacific Ocean) December 4, 2014

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NASA Observes Super Typhoon Hagupit; Philippines Under Warnings

Forecasters at the Joint Typhoon Warning Center expect Super Typhoon Hagupit to reach peak intensity today, Dec. 4, and although expected to weaken, will remain a Category 4 typhoon when it approaches the east central Philippines. NASA's Terra satellite and NASA/JAXA's GPM and TRMM satellites have been providing forecasters with valuable data on the storm. Computer models have varied on their track for the storm based on the strength of an upper-level system, so satellite data is extremely valuable in helping determine where Hagupit will move.

On Dec. 3, typhoon Hagupit was moving from near Palau toward the Philippines when it was examined by two satellites managed by NASA and the Japan Aerospace Exploration Agency known as JAXA. The Tropical Rainfall Measuring Mission or TRMM satellite and the Global Precipitation Measurement or GPM core satellite passed over Hagupit and gathered rainfall and cloud height data.

The TRMM satellite traveled directly over Typhoon Hagupit's eye on December 3, 2014 at 0342 UTC (Dec. 2 at 10:42 p.m. EST). The GPM (core satellite) had a good view of Hagupit later at 1041 UTC (5:41 a.m. EST) Rainfall data captured at that time with GPM's Microwave Imager (GMI) instrument shows that rain was falling at a rate of over 138 mm (~5.4 inches) per hour in the western side of Hagupit's eye.

At NASA's Goddard Space Flight Center in Greenbelt, Maryland the data from the Ku band on GPM's dual frequency radar instrument (DPR) was used to create a 3-D image. The Ku band radar swath showed powerful thunderstorms reaching heights of over 15.8 km (9.8 miles) in feeder bands west of Typhoon Hagupit's eye.

On Dec. 4 at 02:10 UTC, the MODIS (Moderate Resolution Imaging Spectroradiometer) instrument aboard NASA's Terra satellite took a visible image of Super Typhoon Hagupit approaching the Philippines. The MODIS image showed a clear eye surrounded by strong thunderstorms and bands of thunderstorms wrapping into the low-level center. The image also showed that the bulk of strongest thunderstorms were being pushed slightly west of the center as a result of easterly wind shear.

At 1500 UTC (10 a.m. EST) Typhoon Hagupit's maximum sustained winds were near 150 knots (172.6 mph/ 277.8 kph). Currently, typhoon-force winds of 64 knots (74 mph/118.5 kph) or higher occur out to 55 miles of the center.  Tropical Storm-force winds of 34 knots (39 mph/63 kph) or higher occur within 85 to 140 miles of the center. The eye was centered near 11.1 north longitude and 130.9 east latitude, about 640 nautical miles (736 miles/1,185 km) east-southeast of Manila, Philippines. Hagupit was moving to the west-northwest at 12 knots 13.8 mph/22.2 kph).

Warnings in Effect

Philippines warnings in effect as of Dec. 4 include: Public storm warning signal #2 for the following provinces: Visayas: Northern and eastern Samar, Samar, Biliran, Leyte and southern Leyte

Mindanao: Dinagat Island and Siargao Island. And public storm warning signal #1 in effect for the following provinces: Visayas: Northern Cebu including Bantayan island, Camotes island and Bohol; Mindanao: Surigao del Norte & Sur, Camiguin Island and Agusan del Norte; Luzon: Catanduanes, Albay, Sorsogon, Ticao Island and Masbate.

Current Forecast Track from the JTWC

The Joint Typhoon Warning Center (JTWC) current forecast track for Super Typhoon Hagupit projects the eye of the typhoon just over the northeastern tip of Eastern Visayas on Dec. 6 before making landfall over the Bicol region on Dec. 7. The storm is forecast to continue tracking in a northwesterly direction thereafter.

Maximum sustained winds at the time of approach to Eastern Visayas are expected be at Category 4 strength on the Saffir-Simpson scale, although the interaction with land is expected to continue weakening the storm.  

The JTWC forecast calls for Hagupit to remain at typhoon strength as it crosses the Philippines and moves into the South China Sea.

Question in the Forecast Track

As of Dec. 4, not all computer models agree on the exact track the storm will take because of an area of low pressure forecast to move in from the north. Some computer models project that the low pressure system will be strong and would take Hagupit on a more westerly direction over the Central Philippines. Other computer models are projecting that the low pressure area to the north of Hagupit will not be so strong, which will allow the storm to maintain movement in a northwesterly direction.

As satellites gather more information, computer models will update atmospheric conditions that will steer the storm and forecasters will reassess the track as Hagupit nears the Philippines over the next couple of days.

 

 

On Dec. 4 at 02:10 UTC, the MODIS instrument aboard NASA's Terra satellite took this visible image of Super Typhoon Hagupit approaching the Philippines.
Image Credit: 
NASA Goddard's MODIS Rapid Response Team

 

 

 

 

The TRMM satellite traveled directly over Typhoon Hagupit's eye on December 3, 2014 at 0342 UTC and the heaviest rainfall appears in red.
Image Credit: NASA/SSAI/JAXA, Hal Pierce

 

 

 

 

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Dec. 3, 2014 - NASA Tracks Intensifying Typhoon Hagupit

Typhoon Hagupit continues to intensify as it continued moving through Micronesia on Dec. 3 triggering warnings. NASA's Aqua satellite passed overhead and captured an image of the strengthening storm while the Rapidscat instrument aboard the International Space Station provided information about the storm's winds.

The International Space Station-RapidScat instrument monitors ocean winds to provide essential measurements used in weather predictions, including hurricanes. "RapidScat measures wind speed and direction over the ocean surface and captured an image of Hagupit when it was a tropical storm on Dec 2 at 8:50 a.m. GMT," said Doug Tyler of NASA's Jet Propulsion Laboratory, Pasadena, California. "The growing storm, north of New Guinea and headed for the Philippines, already had 25 meters/second winds (50 knots/57.5 mph/92.6 kph)."

A typhoon and tropical storm warning are in effect in Micronesia, in addition to a typhoon watch as Hagupit marches through Micronesia on a west-northwesterly track. A typhoon warning is in effect for Yap and Ngulu in Yap state, and a typhoon watch and tropical storm warning is in effect for Kayangel in the Republic of Palau. In addition, a tropical storm warning is in effect for Koror in the Republic of Palau.

NASA's Aqua satellite captured a visible image of Typhoon Hagupit on Dec. 3 at 04:30 UTC (Dec. 2 at 11:30 p.m. EST) as it moved through Micronesia in the western Pacific Ocean. The image showed a concentration of strong thunderstorms around the center with bands of thunderstorms spiraling into it. 

At 1500 UTC (10 a.m. EST) on Dec. 3, Typhoon Hagupit's maximum sustained winds had increased to 100 knots 115.1 mph/185.2 kph). Typhoon-strength winds extend 30 nautical miles (34.5 miles/55.5 km) out from the center, while tropical storm force winds extend up to 120 nautical miles (138 miles/222 km). 

The typhoon was centered near 8.7 north longitude and 138.3 east latitude, just 91 nautical miles (104.7 miles/168.5 km) west-southwest of the island of Yap. The typhoon is kicking up very rough seas with wave heights to 34 feet (10.3 meters). It was moving to the west-northwest at 18 knots (20.7 mph/33.4 kph) and is expected to continue in that general direction..

Forecasters at the Joint Typhoon Warning Center (JTWC) expect that Hagupit will continue to move west-northwest through Micronesia while intensifying to a Category four typhoon on the Saffir-Simpson scale peaking at 130 knots (149.6 mph/240 kph) over the next two days before it starts to weaken. The JTWC forecast calls for the typhoon to turn to the northwest and stay to the east of the Philippines.

The GPM core satellite had a good view of Hagupit at 1041 UTC on Dec. 3 and showed that rain was falling at a rate of over 138 mm (~5.4 inches) per hour in the western side of Hagupit's eye.Image Credit:NASA/SSAI/JAXA, Hal Pierce

 

 

 

 

 

 

 

 

This RapidScat windmap of Hagupit shows the position of storm on Dec. 2 (right) and Dec. 3 (center). The storm moved a few hundred miles between these times. Winds in red were over 30 meters per second (108 kph/67 mph).
Image Credit: NASA JPL

 

 

 

 

 

NASA's Aqua satellite captured this image of Typhoon Hagupit on Dec. 3 at 04:30 UTC in the western Pacific Ocean.NASA Goddard MODIS Rapid Response
This image from the Rapidscat instrument aboard the ISS was taken when Hagupit was a tropical storm on Dec 2 at 8:50 a.m. GMT and had 25 meters/second winds (50 knots/57.5 mph/92.6 kph).

 

 

 

NASA's Aqua satellite captured this image of Typhoon Hagupit on Dec. 3 at 04:30 UTC in the western Pacific Ocean.NASA Goddard MODIS Rapid Response

 

 

 

 

 

 

 

 

 

 

Dec. 02, 2014 - NASA Sees Typhoon Hagupit as Micronesia Posts Warnings

NASA's Aqua satellite captured a visible picture of Typhoon Hagupit in the western North Pacific Ocean on December 2, when several warnings were in effect for islands in Micronesia. Micronesia warnings include a Typhoon Warning for Woleai, Yap and Ngulu in Yap state, a Typhoon Watch posted for Faraulep, Fais and Ulithi in Yap state, and a Tropical Storm Warning for Faraulep in Yap state. When NASA's Aqua satellite passed over Hagupit on Dec. 2 at 03:45 UTC (Dec. 1 at 10:45 p.m. EST) the MODIS instrument took a visible picture of the storm that showed it had become much better organized over the previous day. Powerful, high thunderstorms circled the center while bands of thunderstorms spiral in from the west, south and north. At 1500 UTC (10 a.m. EST) on Dec. 2, Hagupit had become a Category One typhoon on the Saffir-Simpson wind scale with maximum sustained winds near 70 knots (80.5 mph/129.6 kph). Hagupit was centered near 6.2 north longitude and 142.7 east latitude, about 463 nautical miles (532.8 miles/857.5 km) south of Andersen Air Force Base, Guam. It was moving to the west at 17 knots (19.5 mph/31.8 kph) and generating high seas with waves up to 25 feet (7.6 meters)..

Forecasters at the Joint Typhoon Warning Center forecast Hagupit to continue moving west-northwest through Micronesia and to intensify to 130 knots before weakening. The forecast track takes the center of Hagupit between Palau and Yap on Dec. 3 and toward the Philippines thereafter.

Weakening is not expected to begin until Dec. 6 so Hagupit is expected to maintain typhoon status through December 7.

 

 

 

 

 

 

 

 

 

This visible image of Tropical Storm Hagupit was taken on Dec. 2 by the MODIS instrument aboard NASA's Aqua satellite.Image Credit: 
NASA Goddard MODIS Rapid Response
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NASA's Terra satellite captured this visible image of Tropical Storm Hagupit in the western Pacific Ocean on Dec. 1 at 00:05 UTC (7:05 p.m. EST, Nov. 30).
Image Credit: 
NASA Goddard MODIS Rapid Response