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Meteorological REPORT on CHEDENG-Songda
A new cyclone, the third of the season, was detected on May 20,
2011, east of The Philippines. It has been named "CHEDENG"
(SONGDA). After gaining strength over the open ocean for two days
it had enough energy to be a categorized as a Tropical Cyclone. On
May 23, Chedeng (Songda) entered the Philippine Area of
Responsibility (PAR). Once again, the Philippines faced the threat
of a natural catastrophe.
Chedeng (Songda) continuously gained strength while it moved in
a northwestern direction along the coast. The typhoon reached its
maximum strength in the course of May 27, increasing to maximum
sustained winds of 195 km/h near the center and gustiness of up to
230 km/h. During that day, PAGASA issued a Public Storm Warning
Signals (PSWS) No. 3 (101-185 km/h) for the Batanes Group of
In the late evening of May 27, Chendeng started to slow down and
increase in speed, while it moved generally north northeast towards
the islands of Japan. Its travelling speed increased to 32 km/h on
After being downgraded, Chedeng battered Okinawa with high winds
and heavy rain, before moving up to mainland Japan, weakening
further. In the afternoon of May 29, the typhoon became
extratropical south of Shikoku Island.
Flooding due to the continuous strong rains has been reported
for the Provinces of Maguindanao and Lanao del Sur, affecting
almost 20,500 families with sometimes waist-deep floodwaters.
Another eleven incidents of flooding were reported, including three
landslides. A flashflood incident in Davao del Norte, one out of
eight monitored in total, affected another 16,000 persons.
A total of 82,000 families comprising almost 400,000 persons
were affected in 497 barangays of 49 municipalities and 7 cities,
according to The National Disaster Risk Reduction and Management
Council (NDRRMC). Chedeng's damage to agriculture and
infrastructure amounts to PhP 12,328,983, mainly in Sto. Tomas in
the Davao del Norte region.
In the Philippines Area of responsibility (PAR), NDRRMC reported
four casualties, two due to drowning and one due to a landslide.
The fourth victim was a miner that got trapped inside a tunnel in
In an attempt to offer the best possible support to the
population affected by tropical cyclones and commissioned by
MunichRe, one of the world's leading reinsurance providers, DHI set
up a real-time
monitoring system of wind and rain all over the Philippines.
Based on this monitoring system, MunichRe developed an insurance
solution to protect the low-income population of the affected areas
against the effects of such natural catastrophes and allow for the
necessary reconstruction works. Learn more about DHI'S
TC Warning Graphic, showing the actual position on May 30, 2011
and the predicted track of cyclone Chedeng (Songda). (Source: Joint
Typhoon Warning Center, JTWC)