Tropical Storm SIONY (ATSANI) Advisory No. 08

Tropical Storm SIONY (ATSANI) Advisory No. 08

TROPICAL STORM SIONY (ATSANI) ADVISORY NO. 08 Issued at: 7:00 AM PhT (23:00 GMT) Friday, 06 November 2020 Next update: 7:00 PM PhT (11:00 GMT) Friday, 06 November 2020
Current Status & Outlook	SIONY (ATSANI) has weakened into a Tropical Storm (TS) as it is about to traverse the northernmost part of the Batanes Group within the next 2 to 3 hours, passing very close to the island of Itbayat…expected to move out of the Philippine Area of Responsibility (PAR) on or before midnight tonight. 24-hr Outlook: TS SIONY (ATSANI) is forecast to move west-northwest at a decreased forward speed of 13 km/hr through tomorrow morning, and could regain Severe Tropical Storm (STS) status on or after passing the Bashi Channel today.
Where is SIONY (ATSANI)?	As of 5:00 AM PhT today, November 06…2100 GMT: Location of Center/Eye: Over the Bashi Channel (near 21.0°N 122.8°E) Distance 1: 105 km east-northeast of Itbayat, Batanes Distance 2: 113 km northeast of Basco, Batanes Distance 3: 288 km north-northeast of Santa Ana, Cagayan
How strong is it?	Maximum Sustained Winds (1-min avg): 85 kph near the center…Gustiness: 100 kph.
Past Movement (06 hrs)	West-northwest @ 20 kph, towards Northernmost part of Batanes
Potential Philippine Landfall Area(s)	None
What Philippine areas will be directly affected?	Heavy to Extreme Rainfall (50 mm to >100 mm expected for 24 hrs): BATANES & BABUYAN ISLAND GROUP – Today. Damaging Winds (gusts of more than 100 km/hr expected): BATANES – Today.
Potential Storm Surge/Coastal Flooding Areas+	Coastal Waters of Extreme Northern Luzon – Today. +Waves of 3 meters in height is expected in storm surge-prone areas, particularly in coastal areas on where the Tropical Cyclone is headed. Kindly visit the PAGASA Storm Surge Updates  for more details.
2-Day Forecast Outlook Summary**	SATURDAY EARLY MORNING: Exits PAR as it intensifies into an STS after traversing the northernmost part of the Batanes Group…moving across the coastal waters of Southern Taiwan…about 293 km WNW of Basco, Batanes [2AM Nov 07: 22.0°N 119.7°E @ 95 kph].  Confidence Level: HIGH SUNDAY EARLY MORNING: Already outside of PAR as it begins to move on a southwesterly track while over the South China Sea, weakens into a Severe Tropical Storm…about 517 km W of Basco, Batanes [2AM Nov 08: 21.0°N 117.0°E @ 65 kph].  Confidence Level: MEDIUM **Important Note: Please be reminded that the Forecast Outlook changes every 6 hours, and the Day 2 and 3 Forecast Track have an average error of 100 and 250 km respectively… while the wind speed forecast error, averages 35 km/hr 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.
Other Storm's Meteorological Information	24-hr. Rain Accum. (across its circulation): 25 to 250 mm [Light to Heavy] Minimum Central Pressure: 994 millibars (hPa) Size of Rain Circulation (in Diameter): Average (600 km) Size of Wind Circulation (55-kph Wind Diameter): Small (495 km) Area of Damaging Winds (100 kph or more wind gusts): — km from the center
Information based on data collected by Typhoon2000 (T2k) shall not be taken as official data. Weather information broadcasted and distributed by PAGASA remains as official data. Typhoon2000 (T2k) shall not be responsible for the private use and reliance of its weather information.

Issued by: David Michael V. Padua for Typhoon2000 (T2K)

PAGASA TROPICAL CYCLONE WIND SIGNALS

Image/Screenshot Source: DOST-PAGASA (http://pubfiles.pagasa.dost.gov.ph/tamss/weather/signals.jpg)

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