Tropical Depression Jangmi encountered strong southeasterly vertical wind shear in the Sulu Sea and NASA-NOAA's Suomi NPP satellite captured a visible picture of the storm on Dec. 31.
After crossing southern and central Philippines, Jangmi encountered moderate to strong wind shear on Dec. 31. Jangmi had moved into the Sulu Sea, which is located just west of the Visayas and Mindanao regions of Philippines. Jangmi's center never made it to the island of Palawan, which borders the Sulu Sea to the west. Palawan is an island province of the Philippines in the Mimaropa Region.
NASA-NOAA's Suomi NPP satellite passed over Tropical Depression Jangmi on Dec. 31 at 06:13 UTC (1:13 a.m. EST) and the Visible Infrared Imaging Radiometer Suite (VIIRS) instrument image revealed the effects of wind shear. The VIIRS image showed that the north, northeastern and eastern quadrants of the storm were almost devoid of clouds and showers, as they were being pushed to the northwest and west of the center. Those thunderstorms northwest of the center were weakening. Some of the thunderstorms were being pushed to the northwest and over the island of Palawan.
At 0300 UTC on Dec. 31 (10 p.m. EST on Dec. 30), the Joint Typhoon Warning Center (JTWC) issued their final bulletin on the depression. At that time, Jangmi had maximum sustained winds near 25 knots (28.7 mph/46.3 kph) and was centered near 8.8 north latitude and 121.5 east longitude, or about 116 nautical miles (133.5 miles/214.8 km) north of Zamboanga, Philippines. Jangmi was moving to the south at 6 knots (6.9 mph/11.1 kph).
JTWC noted that upper-level analysis indicates the system has moved into a hostile environment with moderate to high southeasterly vertical wind shear. JTWC forecasters expect Jangmi to dissipate within a day.
Rob Gutro
NASA's Goddard Space Flight Center
NASA's Goddard Space Flight Center
On Dec. 29, 2014 at 1425 UTC (9:25 a.m. EST) TRMM's Microwave Imager (TMI) instrument showed that intense rain bands (red) around the tropical storm were dropping precipitation at a rate of over 50mm (almost 2 inches) per hour.
Image Credit:
NASA/JAXA/SSAI, Hal Pierce
Rainfall totals in the area of the Philippines from December 23-30, 2014 show weekly totals were estimated to be greater than 600 mm (about 24 inches) over the Samar Sea.
Image Credit:
NASA/JAXA/SSAI, Hal Pierce
Heavy rainfall from Tropical storm Jangmi recently produced flooding and landslides in the Philippines that have reportedly killed over 30 people. Data from NASA-JAXA's Tropical Rainfall Measuring Mission or TRMM satellite was used to total that rainfall.
Jangmi became the twenty-third named tropical cyclone in the western Pacific Ocean when it formed southeast of the Philippines on December 28, 2014.The Philippines frequently gets hit by tropical cyclones and Tropical storm Jangmi hit only three weeks after slow moving Typhoon Hagiput churned through the central Philippines.
The TRMM satellite had a fairly good view of Jangmi on December 29, 2014 at 1425 UTC (9:25 a.m. EST). The TRMM's Microwave Imager (TMI) instrument showed that intense rain bands around the tropical storm were dropping precipitation at a rate of over 50mm (almost 2 inches) per hour.
Measurements derived from merging rainfall estimates from various satellites are produced in near real time at the NASA's Goddard Space Flight Center in Greenbelt, Maryland. These estimates cover a global belt extending from 50 degrees South to 50 degrees North latitude. A Multi-satellite Precipitation Analysis (MPA) was produced at Goddard to show rainfall totals in the area of the Philippines from December 23-30, 2014. That analysis showed that tropical storm Jangmi produced copious amounts of rainfall near it's track. However, the highest rainfall totals were in the area of onshore flow northeast of the tropical storm's center of circulation. Rainfall weekly totals were estimated to be greater than 600 mm (about 24 inches) over the Samar Sea. This is in the area where many are still recovering from the devastation caused by typhoon Haiyan in 2013.
Harold F. Pierce
NASA/Science Systems and Applications Inc. (SSAI)
NASA/Science Systems and Applications Inc. (SSAI)
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