Monday, December 29, 2014



for Monday, 29 December 2014 [3:08 PM PhT]


Issued at: 1:45 PM PhT (05:45 GMT) Monday 29 December 2014
Next Update: Monday Evening, 29 December 2014

Tropical Storm 23W (SENIANG) is now named internationally as JANGMI, a Korean word for Rose...has slightly accelerated while crossing Northern in the vicinity of Tubay, Agusan Del Norte...expected to emerge over Butuan Bay later this afternoon, on its way towards the Southern Coast of Bohol.

This cyclone will continue to enhance the Northeast Monsoon (Hanging Amihan) - bringing cooler, windy and mostly cloudy conditions with occasional slight to moderate rains along the northern and eastern sections of Luzon including the Bicol Region.

Residents and visitors along Visayas, Mindanao and Palawan. should closely monitor the development of Jangmi (Seniang).

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 or that are being affected by the hazards generated by the current tropical cyclone.


  • Heavy to Extreme Rains (100 mm or more): Portions of Eastern and Western Samar, Most parts of Leyte, Southern Leyte, Cebu, Bohol, Siquijor, Negros Oriental, Northern and Central Negros Occidental, Eastern Misamis Oriental, Caraga, Camiguin, Dinagat and Siargao Islands. - today through Tuesday morning (Dec 30).
  • Heavy Rains (50 mm to 100 mm): Rest of Samar Provinces, Rest of the Visayas, Northern portions of Zamboanga Peninsula, Misamis Occidental, some portions of Lanao Provinces, Bukidnon, and the Northern part of Davao Region. - today through Tuesday morning (Dec 30).
  • Moderate to Heavy Rains (30 mm to 50 mm): Eastern and Southern Bicol including Masbate-Burias-Ticao Islands, Boracay, Northernmost Antique, Western Aklan, Most parts of Zamboanga Peninsula, Northern Maguindanao, Cotabato and the Rest of Davao Region including Davao and Samal Island. - today through Tuesday morning (Dec 30).
  • Tropical Storm Force Winds (Gusts of not more than 85 kph): Northern Caraga, Eastern Misamis Oriental including Camiguin Island, Dinagat and Siargao Islands, Southern Leyte and Bohol - Today, Monday (Dec 29).


As of 11:00 AM PhT today, Dec 29...0300 GMT.

Classification/Name: TS Jangmi (Seniang)
Location: In the vicinity of Tubay, Agusan Del Norte (near 9.2N 125.5E)
About: 10 km North of Cabadbaran, Agusan Del Norte...or 35 km North of Butuan City, Agusan Del Norte
Maximum Sustained Winds (10-min avg): 65 kph near the center...Gustiness: 85 kph
24 hr. Rain Accumulation (near and west of the center): 50 to 350 mm [Moderate to Extreme]
Minimum Central Pressure: 996 millibars (hPa)
Size of Circulation [Convective Cloud-Based, in diameter]: 690 km (Medium)
Area of Damaging Winds (95 kph or more): None
Past Movement: WNW @ 18 kph
Forecast Movement: WNW @ 16 kph
Towards: Bohol Sea-Southern Negros Area


TS Jangmi (Seniang) is expected to continue moving west-northwestward during the next 12 to 24 hours and will turn west to a slight west-southwest track through 48 hours. On the forecast track, TS Jangmi (Seniang) will pass over the Southern Tip of Cebu and cross Southern Negros on Tuesday morning...and will be over Sulu Sea on Tuesday afternoon through Wednesday morning, on its way towards Southern Palawan.

TS Jangmi (Seniang) is expected to be downgraded back to a Tropical Depression within the next 6 to 24 hours due to its interaction with the land mass of Northern Mindanao and Southern Visayas. Then by 36 to 48 hours, it will regain Tropical Storm status as it moves over the warmer Sulu Sea. Advance Intensity Forecast (AIF) shows its 10-minute maximum sustained winds increasing back to 65 kph by Wednesday morning.

The following is the 3-day forecast outlook summary for this system:

TUESDAY MORNING: Over the southern part of Negros, weakened into a TD...about 45 km southwest of Kabankalan City, Negros Occidental [8AM DEC 30: 9.7N 122.5E @ 55kph].
WEDNESDAY MORNING: Strengthens back into a Tropical Storm (TS) as it moves across the western part of Sulu Sea...about 135 km east-southeast of Puerto Princesa City, Palawan [8AM DEC 31: 9.4N 119.9E @ 65kph].
THURSDAY MORNING: Moving over the West Philippine Sea, after crossing Southern Palawan...intensifies slightly...about 135 km west-northwest of Bataraza, Palawan [8AM JAN 01: 9.0N 116.4E @ 75kph].

*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: 11:00 AM PhT Mon Dec 29, 2014
Location of Center: Near 9.2º N Lat 125.5º E Lon
Distance 1: 65 km S of Surigao City
Distance 2: 90 km E of Camiguin Island
Distance 3: 160 km SSE of Maasin City
Distance 4: 190 km ESE of Tagbilaran City
Distance 5: 215 km SE of Metro Cebu
Distance 6: 240 km E of Dumaguete City









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

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