Philippines – NASA Maps Typhoon Nock-Ten’s Rainfall

NASA has added up the large amounts of rainfall generated throughout the life of the once Super-typhoon Nock-ten from its birth to its entrance into the South China Sea on 27 December, 2016.

The typhoon caused major damage and disruption in several parts of the Philippines. Over 100,000 people were evacuated, and 290 houses have been damaged and 41 destroyed.

According to the National Disaster Risk Reduction and Management Council (NDRRMC) in the Philippines, the typhoon left at least 7 people dead and, as of 27 December, were are missing. Among the fatalities are a couple who were swept away in a flash flood in Albay province, southeast of Manila.

The Global Precipitation Measurement mission or GPM core satellite and other satellites gathered rainfall data on Nock-ten over its lifetime. That data was compiled and analyzed by IMERG at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. NASA’s IMERG or Integrated Multi-satellitE Retrievals for GPM were used to estimate the total amount of rain that Super-typhoon Nock-ten dropped from Dec. 23 through Dec. 27 as it approached and traveled through the Philippines and into the South China Sea.

The IMERG analysis showed estimated rainfall totals from Nock-ten were as high as over 350 mm (13.8 inches) of rain in a large area extending from the Philippine island of Mindoro to the Philippine Sea over Dec. 25 and 26.

The IMERG analysis showed estimated rainfall totals from Nock-ten were as high as over 350 mm (13.8 inches) of rain (purple) in a large area extending from the Philippine island of Mindoro to the Philippine Sea over Dec. 25 and 26.
Credits: NASA/JAXA, Hal Pierce

GPM is a joint mission between NASA and the Japanese space agency JAXA.

Once Nock-ten emerged in the South China Sea vertical wind shear weakened the storm. By Dec. 28 at 0300 UTC (Dec. 27 at 10 p.m. EST), the Joint Typhoon Warning Center (JTWC) issued their final warning on the system. At that time, Nock-ten had weakened to a depression and was located near 12.9 degrees north latitude, and 113.3 degrees east longitude. That’s about 407 nautical miles east-northeast of Ho Chi Minh City, Vietnam.

Nock-ten’s maximum sustained winds had dropped to 28.7 mph 25 knots/46.3 kph), and it was moving to the west-southwest at 17 mph (15 knots/28 kph).

The JTWC expects Nock-ten to dissipate later on Dec. 28 or by Dec. 29.

Flood summary

Last updated: January 2, 2017
Event
Typhoon Nock-Ten, Philippines, December 2016
Date
December 25 to December 28, 2016
Type
Unknown
Cause
Extreme rainfall

Locations

A - Occidental Mindoro
B - Albay province

Magnitude

Rainfall level
110.4 mm in 24 hours
Calapan, Oriental Mindoro - December 26 to December 27, 2016
Rainfall level
119.8 mm in 24 hours
Calayan, Cagayan - December 26 to December 27, 2016

Damages

Evacuated
127,012
December 25 to December 28, 2016
Department of Social Welfare and Development (DSWD) reported on 27 December that 127,012 people had been pre-emptively evacuated and were currently accommodated in 520 evacuation centres.