SEVERE WEATHER BULLETIN #5
FOR: TROPICAL STORM "#SionyPH" (ATSANI)
TROPICAL CYCLONE: ALERT
ISSUED AT 11:00 AM, 03 November 2020
(Valid for broadcast until the next bulletin to be issued at 11 PM today)
"SIONY" SLIGHTLY INTENSIFIES AS IT MOVES SLOWLY OVER THE PHILIPPINE SEA EAST OF EXTREME NORTHERN LUZON.
Track and intensity outlook:
• Track: “SIONY” is forecast to move slowly or almost stationary in the next 24 hours. Afterwards, the tropical storm will move generally westward towards Extreme Northern Luzon. A landfall scenario over Batanes-Babuyan Islands area around Friday remains likely. However, due to the projected quasi-stationary state of this tropical storm, there remains a high degree of uncertainty in the forecast track.
• Intensity: “SIONY” is forecast to intensify into severe tropical storm in the next 24 to 36 hours. Intensification into Typhoon is likely on Thursday prior to close approach or landfall over Extreme Northern Luzon.
Hazards affecting land areas:
• Today, the combined effects of the northeasterlies and the trough of Tropical Storm "SIONY" will bring light to moderate with at times heavy rains over Batanes, Apayao, Cagayan, and Isabela. Flooding (including flashfloods) and rain-induced landslides may occur during heavy or prolonged rainfall especially in areas that are highly or very highly susceptible to these hazards. PAGASA Regional Services Divisions may issue local thunderstorm/rainfall advisories and heavy rainfall warnings as appropriate.
• The northeasterlies enhanced by Tropical Storms "ROLLY" and "SIONY" will bring strong to near gale conditions with higher gusts over Batanes, Babuyan Islands, and the northern portions of Cagayan and Ilocos Norte.
Hazards affecting coastal waters:
• The combined effects of "ROLLY", "SIONY", and the enhanced northeasterlies will bring rough to very rough seas (2.8 to 4.5 m) over the seaboards of Northern Luzon. Sea travel is risky over these waters, especially for those using small seacrafts.
• Moderate to rough seas (1.5 to 2.5 m) will be experienced over the remaining seaboards of Luzon and the eastern seaboards of Visayas and Mindanao. Mariners of small seacrafts are advised to take precautionary measures when venturing out to sea. Inexperienced mariners should avoid navigating in these conditions.
Location of eye/center: At 10:00 AM today, the center of Tropical Storm "SIONY" was estimated based on all available data at 565 km East of Basco, Batanes(20.2°N, 127.4°E).
Strength: Maximum sustained winds of 85 km/h near the center and gustiness of up to 105 km/h.
Movement: Moving East Northeastward Slowly
Forecast Positions
• 24 Hour (Tomorrow morning): 740 km East of Calayan, Cagayan (19.7°N, 128.5°E)
• 48 Hour (Thursday morning):445 km East of Calayan, Cagayan (19.2°N, 125.7°E)
• 72 Hour (Friday morning): 160 km West Southwest of Basco, Batanes (20.0°N, 120.5°E)
• 96 Hour (Saturday morning):625 km West of Basco, Batanes (OUTSIDE PAR) (20.4°N, 116.0°E)
• 120 Hour (Sunday morning):995 km West of Extreme Northern Luzon (OUTSIDE PAR) (19.6°N, 112.0°E)
NO TROPICAL CYCLONE WIND SIGNAL
The public and the disaster risk reduction and management council concerned are advised to take appropriate actions and watch for the next update to be incorporated in the 4 PM Public Weather Forecast and in the next Severe Weather Bulletin to be issued at 11 PM today.
Link: http://bagong.pagasa.dost.gov.ph/tropical-cyclone/severe-weather-bulletin/2
#GTVP
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