Tropical Depression SIONY (ATSANI) Advisory No. 01

Tropical Depression SIONY (ATSANI) Advisory No. 01

TROPICAL DEPRESSION SIONY (ATSANI) ADVISORY NO. 01 Issued at: 1:00 AM PhT (17:00 GMT) Tuesday, 03 November 2020 Next update: 1:00 PM PhT (05:00 GMT) Tuesday, 03 November 2020
Current Status & Outlook	Tropical Depression SIONY (ATSANI) has been wandering around over the North Philippine Sea, with no precise direction on where to go as the High Pressure Steering Flow which is supposed to move the TD remains weak. It remains a potential threat to Extreme Northern Luzon in the coming days. 24-hr Outlook: TD SIONY (ATSANI) is forecast to move very slowly on an East to Southerly track, and shall regain Tropical Storm (TS) classification on Tuesday afternoon.
Where is SIONY (ATSANI)?	As of 11:00 PM PhT last night, November 02…1500 GMT: Location of Center/Eye: Over the Mid-Western Part of the South China Sea  (near 20.5°N 127.5°E) Distance 1: 572 km east of Basco, Batanes Distance 2: 603 km east of Santa Ana, Cagayan Distance 3: 686 km east-northeast of Tuguegarao City, Cagayan
How strong is it?	Maximum Sustained Winds (1-min avg): 55 kph near the center…Gustiness: 75 kph.
Past Movement (06 hrs)	North @ 20 kph, towards North Philippine Sea
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): None Damaging Winds (gusts of more than 100 km/hr expected): None
Potential Storm Surge/Coastal Flooding Areas+	None +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.
3-Day Forecast Outlook Summary**	TUESDAY EVENING: Regains TS status while over the North Philippine Sea…about 688 km E of Basco, Batanes [8PM Nov 03: 20.2°N 128.6°E @ 85 kph].  Confidence Level: MEDIUM WEDNESDAY EVENING: Continues to intensify while moving very slowly southward over the North Philippine Sea…about 599 km E of Santa Ana, Cagayan [8PM Nov 04: 19.2°N 127.8°E @ 100 kph].  Confidence Level: MEDIUM THURSDAY EVENING: Becomes a Typhoon as it Accelerates WSW to Westward toward Extreme Northern Luzon…about 11o km ENE of Santa Ana, Cagayan  [8PM Nov 05: 18.9°N 123.1°E @ 120 kph].  Confidence Level: LOW **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 Accumulation (across its circulation): 25 to 500 mm [Light to Heavy] Minimum Central Pressure: 1002 millibars (hPa) Size of Rain Circulation (in Diameter): Average (505 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
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Image/Screenshot Source: DOST-PAGASA (http://pubfiles.pagasa.dost.gov.ph/tamss/weather/signals.jpg)

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