Typhoon “GLEnDA”
[RAMMASUN]
EDNA L. JUANILLO
Philippines
TY “GLENDA” (RAMMASUN)
(July 13-17, 2014)
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OTHER RELATED INFO
It formed as a Tropical Depression (TD) over
the Caroline Islands, Pacific Ocean, moving
from west to west northwest toward the
eastern border of the PAR (11 Jul 2014);
It gained strength and reached storm intensity
in the morning of Jul 12 while over the Pacific
Ocean and it was given an international name
[RAMMASUN], a Siamese word for "Thunder
God" contributed by Thailand;
It entered the PAR as Tropical Storm (TS) in
the afternoon of 13 Jul and was named
"GLENDA". It then reached typhoon intensity
and continued to move closer to Bicol-Samar
Area;
"GLENDA" as a typhoon, has crossed Bicol
Region, Southern Tagalog Provinces and
Bataan;
"GLENDA" has attained 150 kph maximum
sustained winds and gustiness up to 180 kph;
Period of Occurrence of TY "GLENDA"
inside the PAR is from Jul 13 (5pm) - 17
(11am), 2014 and PSWS # 3, was in effect in
affected areas.
•“GLENDA” is the 2nd tropical cyclone in July and the seventh during the year 2014;
•It is the second tropical cyclone that crossed the country (after TS "BASYANG" Jan 30 -01 Feb);
•It stayed in the PAR for five (5) days which is normal number of days of occurrence of a tropical
cyclone.
•So far, it is the strongest tropical cyclone to cross the country.
Isobaric, Streamline and Rainfall
Analyses, 11 Jul 2014
For 24 Hours, light
rains were recorded
in major parts of the
country with
patches of no rain
in Luzon and
Samar (Visayas)
PWF ISSUED AT
: 5:00 AM 11 JULY 2014
VALID BEGINNING : 5:00 AM TODAY UNTIL 5:00 AM OF NEXT DAY
SYNOPSIS: INTERTROPICAL CONVERGENCE ZONE (ITCZ)
AFFECTING MINDANAO.
FORECAST: DAVAO REGION AND CARAGA WILL HAVE CLOUDY
SKIES WITH LIGHT TO MODERATE RAINS AND THUNDERSTORMS.
METRO MANILA AND THE REST OF THE COUNTRY WILL BE PARTLY
CLOUDY TO CLOUDY WITH ISOLATED RAINSHOWERS OR
THUNDERSTORMS.
.
Isobaric, Streamline and Rainfall
Analyses, 12 Jul 2014
The 24-Hour
recorded rainfall
in major parts of
the country is still
in the light
category.
PWF ISSUED AT
VALID BEGINNING
: 5:00 AM 12 JULY 2014
: 5:00 AM TODAY UNTIL 5:00 AM OF
NEXT DAY
SYNOPSIS: INTERTROPICAL CONVERGENCE ZONE (ITCZ)
AFFECTING MINDANAO.
FORECAST: PALAWAN AND MINDANAO WILL HAVE CLOUDY
SKIES WITH LIGHT TO MODERATE RAINS AND
THUNDERSTORMS. METRO MANILA AND THE REST OF THE
COUNTRY WILL BE PARTLY CLOUDY TO CLOUDY WITH
ISOLATED RAINSHOWERS OR THUNDERSTORMS.
Isobaric, Streamline and Rainfall
Analyses, 13 Jul 2014
Major parts of the
country recorded
light rains.
PWF ISSUED AT
: 5:00 AM 13 JULY 2014
VALID BEGINNING : 5:00 AM TODAY UNTIL 5:00 AM OF NEXT DAY
SYNOPSIS: INTERTROPICAL CONVERGENCE ZONE (ITCZ) AFFECTING
MINDANAO. MEANWHILE, AT 4:00 AM TODAY, THE TROPICAL STORM
RAMMASUN OUTSIDE THE PHILIPPINE AREA OF RESPONSIBILITY
(PAR) WAS ESTIMATED BASED ON ALL AVAILABLE DATA AT 1,540 KM
EAST OF SOUTHERN LUZON (13.6ºN, 139.6ºE). IT IS FORECAST TO
MOVE WEST AT 22 KPH.
FORECAST: MINDANAO WILL EXPERIENCE CLOUDY SKIES WITH
LIGHT TO MODERATE RAINS AND THUNDERSTORMS. METRO MANILA
AND THE REST OF THE COUNTRY WILL BE PARTLY CLOUDY TO
CLOUDY WITH ISOLATED RAINSHOWERS OR THUNDERSTORMS.
Isobaric, Streamline and Rainfall
Analyses, 14 Jul 2014
Moderate rains
observed in the
provinces of Samar
while light to
moderate rains in
other parts of the
country with patches
of no rain in Luzon
and Mindanao.
PWF ISSUED AT
VALID BEGINNING
: 5:00 AM 14 JULY 2014
: 5:00 AM TODAY UNTIL 5:00 AM OF NEXT DAY
SYNOPSIS: AT 4:00 AM TODAY, THE CENTER OF TROPICAL STORM
“GLENDA” WAS ESTIMATED BASED ON ALL AVAILABLE DATA AT 750
KM EAST OF VIRAC, CATANDUANES (13.4ºN, 132.0ºE) WITH MAXIMUM
SUSTAINED WINDS OF 80 KPH AND GUSTINESS OF UP TO 95 KPH. IT
IS FORECAST TO MOVE WEST AT 30 KPH.
FORECAST: BICOL REGION AND EASTERN VISAYAS WILL HAVE
CLOUDY SKIES WITH LIGHT TO MODERATE RAINSHOWERS AND
THUNDERSTORMS. METRO MANILA AND THE REST OF THE COUNTRY
WILL BE PARTLY CLOUDY TO CLOUDY WITH ISOLATED RAINSHOWERS
OR THUNDERSTORMS.
Isobaric, Streamline and Rainfall
Analyses, 15 Jul 2014
Moderate to heavy rains
recorded in Southern
Bicol and Southern
Quezon while, light to
moderate rains over
Samar, Leyte, Masbate,
Marinduque, Southern
Tagalog provinces
including Mindoro and
Metro Manila.
PWF ISSUED AT
VALID BEGINNING
: 5:00 AM 15 JULY 2014
: 5:00 AM TODAY UNTIL 5:00 AM OF NEXT
DAY
SYNOPSIS: AT 4:00 AM TODAY, THE EYE OF TYPHOON “GLENDA”
WAS LOCATED BASED ON ALL AVAILABLE DATA AT 270 KM EAST
OF LEGASPI CITY (12.7ºN, 126.4ºE) WITH MAXIMUM SUSTAINED
WINDS OF 120 KPH AND GUSTINESS OF UP TO 150 KPH. IT IS
FORECAST TO MOVE WEST AT 20 KPH.
FORECAST: METRO MANILA, BICOL REGION, CALABARZON,
MARINDUQUE AND SAMAR WILL EXPERIENCE STORMY WEATHER
WHILE CENTRAL LUZON, AND THE PROVINCES OF ROMBLON,
NORTHERN PART OF LEYTE, MINDORO, AKLAN, CAPIZ,
PANGASINAN, NUEVA VIZCAYA AND QUIRINO, WILL HAVE RAINS
WITH GUSTY WINDS AND THE COASTAL WATERS ALONG THESE
AREAS WILL BE ROUGH TO VERY ROUGH.
Typhoon Glenda (Rammasun) making landfall in the Philippines
on July 15
Isobaric, Streamline and Rainfall
Analyses, 16 Jul 2014
Moderate rains over
Zambales and Bataan
while light to moderate
rains in other parts of the
country with patches of no
rain over eastern Samar
and southeastern
Mindanao.
PWF ISSUED AT
VALID BEGINNING
: 5:00 AM 16 JULY 2014
: 5:00 AM TODAY UNTIL 5:00 AM OF NEXT DAY
SYNOPSIS: AT 4:00 AM TODAY, THE EYE OF TYPHOON “GLENDA” WAS
LOCATED BASED ON ALL AVAILABLE DATA AND SUBIC RADAR STATION
IN THE VICINITY OF NAGCARLAN, LAGUNA OR 70 KM SOUTHEAST OF
METRO MANILA (14.0ºN, 121.4ºE) WITH MAXIMUM SUSTAINED WINDS OF
150 KPH AND GUSTINESS OF UP TO 185 KPH. IT IS FORECAST TO MOVE
WEST NORTHWEST AT 26 KPH.
FORECAST: METRO MANILA, CALABARZON, CENTRAL LUZON AND THE
PROVINCES OF MINDORO, CAMARINES, ALBAY, ROMBLON,
PANGASINAN, NUEVA ECIJA, LA UNION, BENGUET AND SOUTHERN
AURORA WILL EXPERIENCE STORMY WEATHER WHILE THE PROVINCES
OF ILOCOS SUR, NUEVA VIZCAYA, QUIRINO, CATANDUANES,
SORSOGON, MASBATE, REST OF AURORA AND TICAO ISLAND WILL
HAVE RAINS WITH GUSTY WINDS AND THE COASTAL WATERS ALONG
THESE AREAS WILL BE ROUGH TO VERY ROUGH. THE REST OF LUZON
AND OF VISAYAS WILL EXPERIENCE CLOUDY SKIES WITH LIGHT TO
MODERATE RAINS AND THUNDERSTORMS. MINDANAO WILL BE PARTLY
Isobaric, Streamline and Rainfall
Analyses, 17 Jul 2014
Light to moderate
rains observed in
many parts of the
country with
patches of no
rain.
PWF ISSUED AT : 5:00 AM 17 JULY 2014
VALID BEGINNING : 5:00 AM TODAY UNTIL 5:00 AM OF NEXT DAY
SYNOPSIS: AT 4:00 AM TODAY, THE EYE OF TYPHOON “GLENDA”
WAS LOCATED BASED ON ALL AVAILABLE DATA AT 380 KM WEST
SOUTHWEST OF DAGUPAN CITY (15.8ºN, 116.8ºE) WITH MAXIMUM
SUSTAINED WINDS OF 130 KPH AND GUSTINESS OF UP TO 160 KPH.
IT IS FORECAST TO MOVE WEST NORTHWEST AT 20 KPH .
MEANWHILE, THE LOW PRESSURE AREA (LPA) WAS ESTIMATED AT
940 KM EAST OF NORTHERN MINDANAO (10.2 °N, 135.6 °E)
FORECAST: METRO MANILA, CENTRAL LUZON, CALABARZON AND
THE PROVINCES OF MINDORO, PALAWAN, LA UNION, BENGUET AND
PANGASINAN WILL HAVE OCCASIONAL RAINS. THE REST OF THE
COUNTRY WILL BE PARTLY CLOUDY TO CLOUDY SKIES WITH
ISOLATED RAINSHOWERS AND THUNDERSTORMS.
Isobaric, Streamline and Rainfall
Analyses, 18 Jul 2014
Light to moderate
rains observed in
many parts of the
country with patches
of no rain over
western Visayas.
PWF ISSUED AT : 5:00 AM 18 JULY 2014
VALID BEGINNING : 5:00 AM TODAY UNTIL 5:00 AM OF NEXT DAY
SYNOPSIS: SOUTHWEST MONSOON AFFECTING THE WESTERN SECTION
OF LUZON. MEANWHILE, AT 4:00 AM TODAY, TROPICAL STORM [MATMO]
OUTSIDE THE PHILIPPINE AREA OF RESPONSIBILITY (PAR) WAS ESTIMATED
BASED ON ALL AVAILABLE DATA AT 1000 KM EAST OF NORTHERN
MINDANAO (10.2°N, 135.4°E) WITH MAXIMUM SUSTAINED WINDS OF 65 KPH
AND GUSTINESS OF UP TO 80 KPH . IT IS FORECAST TO MOVE NORTH
NORTHWEST SLOWLY. \
FORECAST: METRO MANILA, CENTRAL LUZON, CALABARZON AND THE
PROVINCES OF MINDORO AND PALAWAN WILL HAVE OCCASIONAL RAINS.
THE REST OF THE COUNTRY WILL BE PARTLY CLOUDY TO CLOUDY WITH
ISOLATED RAINSHOWERS AND THUNDERSTORMS.
Total RR and Track of TY “GLENDA
“Glenda” entered the eastern border of the PAR as a tropical storm in the afternoon of Jul 13. It
continued to move west to west northwest and reached typhoon strength before it made landfall.
“GLENDA” has crossed Bicol Region, Southern Tagalog Provinces and Bataan. It left the western
border in the morning of Jul 17. Along its path, the observed cumulative rainfall were moderate to
heavy while light to moderate rains over the nearby provinces. “GLENDA”s rainfall pattern
appeared that it did not enhance the southwest monsoon flow and it behaved like a winter cyclone
where the concentration of rainfall is only along its path.
Top Five (5) PAGASA Stations Recorded
Extremes Weather Parameters
Hi-24 Hr RR
in mm
Stn. No.
545
Name
Sorsogon
444
Legaspi
435
Hi-Wind Gust
in kph
Minimum SLP
in hPa
Stn. No.
444
Name
Legaspi
Gust
162
Stn. No.
444
Name
Legaspi
MSLP
964.2
238.2
428
Sangley Pt.
162
435
Alabat
975.5
Alabat
195.0
545
Sorsogon
122
432
Ambulong
975.8
427
Tayabas
187.4
429
NAIA
113
545
Sorsogon
983.5
546
Catarman
143.5
425
P. Area
108
427
Tayabas
983.9
RR
247.8
Source: TY Passage Report Coming From PRSD
Graph of 12 Hourly Estimated Minimum Central
Pressure and Maximum Sustained Winds
ESTIMATED 12 HOURLY MAXIMUM SUSTAINED WINDS NEAR THE CENTER OF TY"GLENDA"
JUL 13 - 17, 2014
ESTIMATED 12 HOURLY MINIMUM SEA LEVEL PRESSURE OF TY"GLENDA"
JUL 13 - 17, 2014
160
1000
140
990
980
100
MSW IN KPH
MSLP IN hPa
120
970
80
60
960
40
950
20
940
71300
12
71400
12
71500
12
MONTH/DATE/TIME
71600
12
71700
12
0
71300
12
71400
12
71500
12
71600
12
71700
12
MONTH/DATE/TIME
“GLENDA” has entered the PAR in the afternoon of Jul 13 as a tropical storm.It gained
strength and became a typhoon as it moved closer to Bicol-Samar Area. “GLENDA” with
maximum sustained winds of 150 kph and a central pressure of 963.0 hPa crossed Bicol
region, Southern Tagalog provinces and Bataan. PSWS# 3 was the highest which in effect
to areas along the path of typhoon “GLENDA”, and it left the western border in the
morning of Jul 17 still in a typhoon category.
Summary
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The month of July is peak of the southwest monsoon where major parts of the country
usually experience rains especially the western portions
Tropical Cyclones (TCs) that enter PAR generally move WNW-NW then to N out of the
northern border;
TC “GLENDA” was spotted over the Caroline Is. on the 11th of Jul. as a tropical
depression; maintaining its west to west northwest course. It gained storm intensity and
given an international name [RAMMASUN];
It entered the PAR as storm and was given a local name “GLENDA”. It continued to
move in a W-WNW direction due to the persistence of the ridge of the NPHPA and
intensified further into a typhoon due to favorable conditions such as weak vertical shear
and warm sea surface temperatures;
As a typhoon, it continued to move closer to the country and track across Bicol Region,
Southern Tagalog Provinces and Bataan;
It left the western border of the PAR in the morning of July 17;
“GLENDA” while inside the PAR, attained maximum sustained winds of 150 kph and
gustiness of up to 180 kph.
Public Storm Warning Signal # 3 was in effect over areas along its path specifically
Metro Manila;
It is the second and strongest tropical cyclone that crossed the country this year after
TS “BASYANG” (Jan 30-01 Feb);
The track and rainfall pattern of “GLENDA” were quite unusual if compared from the
normal during the period;
The impacts of TY “GLENDA”, based on the initial report of the Office of Civil Defense
were as follows: a) Damage to Properties (Agri, Infra & Others) = P18,083.603 B,
b) Casualties: Dead-106, Injured-1,250 & Missing-5 and c) Affected Regions: I, III,
IVa&b, VII and NCR.