Attachments
I. Situation Overview
Issued on 03 September 2023 at 5PM, Typhoon “Hanna” has made landfall over Taitung County,
Taiwan
HAZARDS AFFECTING LAND AREAS
Heavy Rainfall
Forecast accumulated rainfall for today
- 50-100 mm: Batanes and the northern portion of Babuyan Islands Forecast rainfall are generally higher in elevated or mountainous areas. Under these conditions, flooding and rain-induced landslides are possible especially in areas that are highly or very highly susceptible to these hazards as identified in hazard maps and in localities that experienced considerable amounts of rainfall for the past several days.
The Southwest Monsoon currently enhanced by “Hanna” will bring occasional to monsoon rains over the western portion of Luzon and Antique in the next three days.
For more information, refer to Weather Advisory #20 for Southwest Monsoon issued at 11:00 AM today and 24-Hour Public Weather Forecast and Outlook at 4:00 PM today.
Severe Winds
The wind signals warn the public of the general wind threat over an area due to the tropical cyclone. Local winds may be slightly stronger/enhanced in coastal and upland/mountainous areas exposed to winds. Winds are less strong in areas sheltered from the prevailing wind direction.
- Minimal to minor impacts from strong winds are also possible within any of the areas under Wind Signal No. 1.
The enhanced Southwest Monsoon will continue to bring gusty conditions over the following areas not under any Wind Signal, especially in coastal and upland/mountainous areas exposed to winds:
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Today: Ilocos Region, Cordillera Administrative Region, Nueva Vizcaya, Zambales, Pampanga, Bataan, Aurora, Bulacan, Metro Manila, CALABARZON, MIMAROPA, Bicol Region, Western Visayas, and the northern portion of Eastern Visayas.
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Tomorrow: Batanes, Babuyan Islands, Ilocos Region, Abra, Benguet, Apayao, Nueva Vizcaya, Zambales, Pampanga, Bataan, Aurora, Bulacan, Metro Manila, CALABARZON, and most of Bicol Region, MIMAROPA, and Western Visayas.
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Tuesday: Batanes, Babuyan Islands, Ilocos Region, Zambales, Bataan, Cavite, the northern portion of Quezon, Lubang Island, Romblon, and Kalayaan Islands.
HAZARDS AFFECTING COASTAL WATERS
Due to the combined influence of “Hanna” and the enhanced Southwest Monsoon, a Gale Warning is in effect for the northern, western, and southern seaboards of Luzon and the western seaboard of Visayas. Disruption in civilian maritime activities is expected over these areas (e.g., suspension of sea travel) due to hazardous sea condition. For more information, refer to Gale Warning #25 issued at 5:00 PM today.
TRACK AND INTENSITY OUTLOOK
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“Hanna” is forecast to move generally west northwestward while crossing the rugged terrain of southern Taiwan, resulting in considerable weakening. It may emerge over the Taiwan Strait and exit the Philippine Area of Responsibility (PAR) this late evening or tomorrow early morning.
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Outside the PAR region, “Hanna” will become slow-moving as it moves westward or west northwestward over the Taiwan Strait. The weakening trend is forecast to continue after crossing Taiwan due to land interaction and increasingly unfavorable environment. It is forecast to make its final landfall along the coast of Guangdong or Fujian, China on Tuesday as a Severe tropical storm. “Hanna” may weaken into a remnant low on late Wednesday or Thursday.
The center of the eye of Typhoon “Hanna” was estimated based on all available data at 245 km North Northwest of Itbayat, Batanes (22.9 °N, 121.2 °E) moving West Northwestward at 20 km/h with maximum sustained winds of 155 km/h near the center and gustiness of up to 255 km/h.
Source: DOST-PAGASA Tropical Cyclone Bulletin #16
II. Status of Affected Areas and Population
A total of 173,543 families or 636,086 persons are affected in 1,999 barangays in Regions NCR, CAR, I, II, III, CALABARZON, MIMAROPA, VI, VII, and XI (see Table 1).