MANILA, Philippines –
'Bagyong Siony' (Atsani) slightly intensifies as it moves slowly over the Philippine Sea east of Extreme Northern Luzon, state weather bureau PAGASA announced in its 11:00 am bulletin on Tuesday, November 3, 2020.
Tropical Storm '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.
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.
SEE ALSO: 'Bagyong Siony' PAGASA weather update November 4, 2020
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| Satellite image of Tropical Storm 'Siony' (Atsani) as of 11:00 am, November 3, 2020. PAGASA |
Tropical Storm '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.
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.
SEE ALSO: 'Bagyong Siony' PAGASA weather update November 4, 2020
'Siony' has maximum sustained winds of 85 km/h near the center and gustiness of up to 105 km/h. It is moving East Northeastward slowly.
Forecast Positions
NO TROPICAL CYCLONE WIND SIGNAL as of press time.
'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.
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 the tropical storms, 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.
'Bagyong Siony' is the Philippines' 19th tropical cyclone for 2020.
On average, there are 20 tropical cyclones that could form or enter the PAR each year. Only half of those are projected to make landfall.
PAGASA declared the onset of rainy season on June 12.
— The Summit Express
Forecast Positions
- 24 Hour (Tomorrow morning): 740 km East of Calayan, Cagayan
- 48 Hour (Thursday morning):445 km East of Calayan, Cagayan
- 72 Hour (Friday morning): 160 km West Southwest of Basco, Batanes
- 96 Hour (Saturday morning):625 km West of Basco, Batanes (OUTSIDE PAR)
- 120 Hour (Sunday morning):995 km West of Extreme Northern Luzon (OUTSIDE PAR)
NO TROPICAL CYCLONE WIND SIGNAL as of press time.
'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.
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 the tropical storms, 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.
'Bagyong Siony' is the Philippines' 19th tropical cyclone for 2020.
On average, there are 20 tropical cyclones that could form or enter the PAR each year. Only half of those are projected to make landfall.
PAGASA declared the onset of rainy season on June 12.
— The Summit Express
