WEATHER.COM.PH / T2K TROPICAL CYCLONE UPDATES
TROPICAL STORM SONAMU (AURING) UPDATE NUMBER 013
Issued: 7:00 AM PhT (23:00 GMT) Monday 07 Jan 2013
Next Update: 1:00 PM PhT (05:00 GMT) Monday 07 Jan 2013
Tropical Storm Sonamu (Auring) moving slowly across the South China Sea with no change in strength.
Meanwhile, Tropical Disturbance 94W (LPA) continues to move closer to Davao Oriental. Its center was located over the Philippine Sea...about 295 km east-southeast of Mati City, Davao Oriental (6.2N Lat 128.8E Lon)...with maximum winds of 30 km/hr near the center and was moving west-northwest at 20 kph towards Davao Provinces. This disturbance has a low chance (<30%) of developing into a Tropical Cyclone within the next 24 hours, however, its rainbands will bring moderate to heavy rains with thunderstorms along Southern & Eastern Mindanao particularly Caraga and Davao Regions today.
Residents and visitors along Southern Vietnam, Western Malaysia and Southern Thailand should closely monitor the development of Sonamu (Auring).
Do not use this for life or death decision. This update is intended for additional information purposes only. Kindly refer to your national weather agency for official warnings, advisories or bulletins.
CURRENT STORM ANALYSIS
As of 6 AM today, the center of Tropical Storm Sonamu (Auring) was located over the South China Sea...about 485 km south-southeast of Ho Chi Minh City, Vietnam or 621 km south-southwest of Nha Trang, Vietnam...currently moving slowly west-southwest with a forward speed of 9 km/hr in the general direction of the South China Sea.
Maximum Sustained Winds (1-min. avg) are at 75 km/hr near the center with higher gusts. Tropical Storm Force Winds (62-95 km/hr) extend outward up to 100 kilometers from the center. Sonamu (Auring) remains an average-sized tropical cyclone with a diameter of 390 kilometers across. The 24-hour rainfall accumulation near the center and to the west of TS Sonamu is estimated to be extreme (520 mm).
3-DAY FORECAST OUTLOOK*
Tropical Storm Sonamu (Auring) is expected to continue moving west-southwest slowly during the next 12 to 24 hours...with a drift to the southwest throughout the forecast period. On the forecast track, the core of Sonamu (Auring) should remain over the South China Sea until Wednesday...and approach the coastal area of Western Malaysia on Thursday morning.
Sonamu (Auring) is forecast to weaken into a Tropical Depression on Tuesday morning...and dissipate into an area of low pressure on Thursday morning.
The following is the summary of the 3-day forecast outlook on this system:
TUESDAY MORNING: Weakens into a Tropical Depression while moving west-southwest across the South China Sea...about 502 km south-southwest of Ho Chi Minh City, Vietnam [6AM JAN 08: 6.3N 106.3E @ 55kph].
WEDNESDAY MORNING: Continues to weaken as it turns southwest towards the coast of Western Malaysia...about 468 km northeast of Kuala Lumpur, Malaysia [6AM JAN 09: 5.6N 105.1E @ 45kph].
THURSDAY MORNING: Dissipated into an area of low pressure...near the coast of Western Malaysia...about 362 km northeast of Kuala Lumpur, Malaysia [6AM JAN 10: 4.6N 104.6E @ 35kph].
*Please be reminded that the Forecast Outlook changes every 6 hours, and the Day 3 Forecast Track have an average error of 250 km...while the wind speed forecast error, averages 35 kph 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.
EFFECTS & HAZARDS SUMMARY
Below is the summary of the storm's parts and its hazards affecting specific areas. You can also view this image link for you to understand the parts.
INNER RAINBANDS - over water (South China Sea)...not affecting any land areas. Tropical Storm Conditions with Tropical Storm Force Winds (62-95 kph) will be expected along these bands.
OUTER RAINBANDS - affecting and spreading across the coastal areas of Southern Vietnam and Western Malaysia. Tropical Depression Conditions with light to moderate winds (05-61 kph) will be expected along these bands (click here to know more about Rainbands).
24HR TOTAL RAINFALL ACCUMULATION - from 5 up to 200 mm (slight to heavy rainfall) can be expected along areas affected by the outer & inner rainbands (see above)...with isolated amounts of 201 to 520 mm (heavy to extreme) along areas near, north and west of the center of TS Sonamu (Auring).
Important Note: Please keep in mind that the above forecast outlook, effects and hazards summary changes every 6 to 12 hrs!
CURRENT TECHNICAL INFORMATION
Time/Date: 6:00 AM PhT Mon January 07, 2013
Class/Name: TS Sonamu (Auring)
Location of Center: 6.7º N Lat 108.2º E Lon
Distance 1: 485 km (SSE) from Ho Chi Minh, Vietnam
Distance 2: 621 km (SSW) from Nha Trang, Vietnam
Distance 3: 824 km (ENE) from Kuala Lumpur, Malaysia
MaxWinds (1-min avg): 75 kph near the center
Peak Wind Gusts: 95 kph
Present Movement: WSW @ 9 kph
Towards: South China Sea
24hr Rainfall Accum (near center): Extreme [520 mm]
Minimum Central Pressure: 993 millibars (hPa)
Size (in Diameter): 390 km [Average]
Max Sea Wave Height (near center): 15 feet
Possible Storm Surge Height: 1-3 ft (0.3-0.9 m)
T2K/WP StormTracks (for Public): GIF | Google Map (Flash)
CURRENT NOAA/MTSAT-2 INFRARED SATELLITE IMAGE:
CURRENT TRACKING CHART:
>> To know the meteorological terminologies and acronyms used on this update visit the ff:
For the complete details on TS SONAMU (AURING)...go visit our website @:
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