TROPICAL CYCLONE BULLETIN NR. 1
Tropical Depression #MirasolPH
Issued at 5:00 PM, 16 September 2025
Valid for broadcast until the next bulletin at 8:00 PM today.
THE LOW PRESSURE AREA EAST OF QUEZON DEVELOPED INTO TROPICAL DEPRESSION MIRASOL.
• Location of Center (4:00 PM)
The center of Tropical Depression MIRASOL was estimated based on all available data at 210 km East Northeast of Infanta, Quezon (15.4°N, 123.5°E).
• Intensity
Maximum sustained winds of 55 km/h near the center, gustiness of up to 70 km/h, and central pressure of 1006 hPa
• Present Movement
Northwestward at 25 km/h
• Extent of Tropical Cyclone Winds
Strong winds extend outwards up to 180 km from the center
TROPICAL CYCLONE WIND SIGNALS (TCWS) IN EFFECT
TCWS No. 1
➣ Wind threat: Strong winds
➣ Warning lead time: 36 hours
➣ Range of wind speeds: 39 to 61 km/h (Beaufort 6 to 7)
➣ Potential impacts of winds: Minimal to minor threat to life and property
LUZON:
Batanes, Cagayan including Babuyan Islands, Isabela, Quirino, the northeastern portion of Nueva Vizcaya (Diadi, Quezon, Kasibu, Dupax del Norte, Bambang, Ambaguio, Bayombong, Solano, Villaverde, Bagabag), the northern and central portions of Aurora (Dilasag, Casiguran, Dinalungan, Dipaculao, Baler), Apayao, Kalinga, Abra, Mountain Province, Ifugao, Ilocos Norte, Polillo Islands, the northern portion of Camarines Norte (Vinzons, Capalonga, Jose Panganiban, Paracale, Talisay, Daet, Mercedes), the northeastern portion of Camarines Sur (Caramoan, Garchitorena, Presentacion, Lagonoy, Siruma, Tinambac, Goa, San Jose), and Catanduanes
OTHER HAZARDS AFFECTING LAND AREAS
➣ Heavy Rainfall Outlook
Refer to Weather Advisory No. 2 issued at 5:00 PM today for the heavy rainfall outlook due to Tropical Cyclone MIRASOL.
➣ 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 possible within any of the areas under Wind Signal No. 1.
The Southwest Monsoon will bring strong to gale-force gusts over the following areas (especially in coastal and upland areas exposed to winds):
• Tomorrow : The southern portion of Quezon, the rest of Camarines Norte that is not under Wind Signal, Marinduque, Romblon, the southern portion of Mindoro provinces, and Panay Island.
• Thursday (18 September) : Panay Island, Palawan, Mindoro Provinces, Marinduque, Romblon, the southern portion of Quezon, Camarines Norte, Isabela, Cagayan including Babuyan Islands, Batanes, Ilocos Norte, Ilocos Sur, La Union, and Pangasinan.
HAZARDS AFFECTING COASTAL WATERS
➣ 24-Hour Sea Condition Outlook
Up to moderate seas over the following coastal waters:
• Up to 2.5 m: The seaboards of Cagayan, Babuyan Islands, and Batanes; the eastern seaboards of Isabela and Aurora; the northern seaboard of Ilocos Norte.
• Mariners of motorbancas and similarly-sized vessels are advised to take precautionary measures while venturing out to sea and, if possible, avoid navigation under these conditions.
TRACK AND INTENSITY OUTLOOK
• Tropical Depression MIRASOL is forecast to continue moving northwestward and will slightly decelerate as it approaches Isabela-Aurora area. On the forecast track, the center of MIRASOL may make landfall in Isabela or northern portion of Aurora by tomorrow morning. However, a more north northwestward or northward movement will likely result to no landfall scenario and will just move over the coastal waters of Northern and Central Luzon. By Thursday (18 September) morning, MIRASOL will re-emerge over the Luzon Strait and will continue moving north northwestward until it exits the Philippine Area of Responsibility between afternoon and evening.
• MIRASOL will slightly weaken as it traverses the Northern Luzon landmass. Once it is over the West Philippine Sea, it is forecast to intensify and reach tropical storm category by Thursday afternoon or evening.
Considering these developments, the public and disaster risk reduction and management offices concerned are advised to take all necessary measures to protect life and property. Persons living in areas identified to be highly or very highly susceptible to these hazards are advised to follow evacuation and other instructions from local officials. For heavy rainfall warnings, thunderstorm/rainfall advisories, and other severe weather information specific to your area, please monitor products issued by your local PAGASA Regional Services Division.
The next tropical cyclone bulletin will be issued at 8:00 PM today.
DOST-PAGASA
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