Friday, July 18, 2014

Powerful Typhoon RAMMASUN (GLENDA) Update #013


for Wednesday, 16 July 2014 [7:00 PM PhT]


Issued at: 6:45 PM PhT (10:45 GMT) Wednesday 16 July 2014
Next Update: 6:00 AM PhT (22:00 GMT) Thursday 17 July 2014

Typhoon RAMMASUN (GLENDA) has weakened after passing the landmass of Southern over the West Philippine Sea as it accelerated during the past six hours.

Residents and visitors along Hainan, Southern China should closely monitor the development of TY Rammasun (Glenda).

Information based on data collected by WeatherPhilippines Foundation, Inc. shall not be taken as official data. Weather information broadcasted and distributed by PAGASA remains as official data. WeatherPhilippines shall not be responsible for the private use and reliance of its weather information.


Below are the regions or places in the Philippines that could be affected by the current tropical cyclone.

ZAMBALES, WESTERN PANGASINAN, WESTERN PAMPANGA AND BATAAN:  Moderate rains of 30 to 50 mm will be experienced tonight until Thursday morning...with Tropical Storm Force Winds of 65 kph or more may still be felt tonight. Residents in these areas are advised to be always on alert and closely monitor the weather situation.


As of 5:00 PM PhT today...0900 GMT.

Location: Over the West Philippine Sea (near 15.4N 118.3E)
About: 310 km west-northwest of Metro Manila...or 185 km west of Iba, Zambales
Maximum Sustained Winds (1-min avg): 150 kph near the center...Gustiness: 185 kph
24 hr. Rain Accumulation (near the center): 200 to 350 mm [Heavy to Extreme]
Size (in diameter): 555 km (Small)
Area of Damaging Winds (95 kph or more): 90 kilometers from the center
Past Movement: Northwest @ 30 kph
Forecast Movement: Northwest @ 18 kph
Towards: South China Sea


TY Rammasun (Glenda) is expected to slow down as it moves northwestward throughout the forecast period. On the forecast track, the typhoon will exit the Philippine Area of Responsibility (PAR) by Thursday morning...and will continue to move across the South China Sea towards Hainan, China.

Rammasun is expected to reintensify during the next 24 it moves across the South China Sea through 48 hours. Advance Intensity Forecast (AIF) shows its 1-minute maximum sustained winds increasing to 185 kph (Category 3 Typhoon) by Thursday afternoon.

The following is the summary of the 2-day forecast outlook on this system:

THURSDAY AFTERNOON: Intensifies into a Category 3 Typhoon as it moves across the South China Sea...about 570 km west-southwest of Iba, Zambales [2PM JUL 17: 17.1N 115.0E @ 185kph].
FRIDAY AFTERNOON: Maintains it strength as it moves closer to Northern Hainan...about 100 km southeast of Haikou, Hainan, China [2PM JUL 18: 19.5N 111.1E @ 185kph].

*Please be reminded that the Forecast Outlook changes every 6 hours, and the Day 2 and 3 Forecast Track has an average error of 100 and 250 km respectively...while the wind speed forecast error, averages 35 kph per day. Therefore, a turn to the left or right of its future track and changes in its wind speed must be anticipated from time to time.

Important Note: Please keep in mind that the above hazards summary and forecast outlook changes every 6 to 12 hrs!


Time/Date: 5:00 PM PhT Tue Jul 16, 2014
Class/Name: TY Rammasun (Glenda)
Minimum Central Pressure: 963 millibars (hPa)

Location of Eye: Near 15.4º N Lat 118.3º E Lon
Distance 1: 310 km WNW of Metro Manila
Distance 2: 220 km WNW of Subic, Zambales
Distance 3: 185 km W of Iba, Zambales
Distance 4: 245 km W of Tarlac City
Distance 5: 271 km NW of Lubang Island

Issued by: Leonilo C. Millanes for







>> To know the meteorological terminologies and acronyms used on this update visit the ff:

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