Tuesday, September 13, 2011

TD 18W [ONYOK] - Update #006

 


for Tuesday, 13 September 2011 [12:20 PM PhT]

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Typhoon2000 (T2K) NEWS (Sunday Sep 11 2011):

Currently issuing 6-hrly web, SMS, email, & android (iTyphoon) updates (except 12:00 Midnight) on 18W (ONYOK).


18W (ONYOK) MAX WIND SPEED PER AGENCY:

+ USA (JTWC/1-min avg): 55 km/hr
+ Japan (JMA/10-min avg): 55 km/hr
+ Philippines (PAGASA/10-min avg): 55 km/hr
+ Beijing (NMC/2-min avg): -- km/hr
+ Taiwan (CWB/10-min avg): -- km/hr
+ Korea (KMA/10-min avg): -- km/hr

+ Hong Kong (HKO/10-min avg): -- km/hr


TROPICAL DEPRESSION 18W [ONYOK]
T2K PUBLIC ADVISORY NUMBER 006

12:00 PM PhT (04:00 GMT) Tue 13 September 2011
Source: T2K Analysis/JTWC Warning #007/SatFixes
View: Advisory Archives (2004-2011)
Tropical Depression 18W (ONYOK) drifting east-northeastward slowly and has moved out of the Philippine Area of Responsibility (PAR).

Residents and visitors along the Okinawa, Ryukyus & Taiwan should closely monitor the progress of 18W (ONYOK).

Do not use this for life or death decision. This advisory is intended for additional information purposes only. Kindly refer to your country's official weather agency for local warnings, advisories & bulletins.


CURRENT STORM INFORMATION

Time/Date: 12:00 PM PhT Tue September 13 2011
Location of Center: 22.3º N Lat 136.4º E Lon
Distance 1: 144 km East of P. A. R.
Distance 2: 988 km SE of Okinawa, Japan
Distance 3: 1,503 km ENE of Basco, Batanes
MaxWinds (1-min avg): 55 kph (30 kts) near the center
Peak Wind Gusts: 75 kph (40 kts)
Present Movement: ENE @ 05 kph (03 kts)
Towards: Okinawa-Ryukyus Area
6-12hr Rainfall Accum (near center): 210 mm (High)
Minimum Central Pressure: 1000 millibars (hPa)
Saffir-Simpson Typhoon Scale: Tropical Depression
Size (in Diameter): 1,000 km [Very Large]
Wind Area Distribution (in Knots): Current Wind Profile
Max Sea Wave Height (near center): 15 ft
Possible Storm Surge Height: 0 ft [0 m]
Wunder TrackMap (for Public): 8 AM PhT Tue Sep 13


3-DAY FORECAST OUTLOOK & ANALYSIS*

18W (ONYOK) is expected to move west-northwest with a slight forward speed during the next 48 hours...with a turn towards the northwest thereafter. On the forecast track, the center of the depression will re-enter the PAR tonight and moving closer to Okinawa on Friday.

Maximum Sustained Winds (1-min. avg) remain near 55 km/hr (30 knots) with higher gusts. 18W is a Tropical Depression (TD) on the Saffir-Simpson Tropical Cyclone Scale. Additional strengthening is forecast during the next 48 to 72 hours...and the depression could become a Tropical Storm (TS) on Wednesday.

The following is the summary of the 3-day forecast outlook on this system:

WEDNESDAY MORNING:  Strengthens to a Tropical Storm as it moves WNW-ward across the North Philippine Sea...about 744 km SE of Okinawa, Japan [8AM SEP 14: 22.5N 133.7 @ 65kph].
THURSDAY MORNING:  Continues to intensify as it moves in the direction of the Southern Islands of Japan...about 478 km SE of Okinawa, Japan [8AM SEP 15: 23.7N 131.4E @ 85kph].
FRIDAY MORNING:  Nearing typhoon strength as it moves out of PAR...approaching the southeastern shores of Okinawa Island...about 246 km SE of Okinawa City [8AM SEP 16: 25.0N 129.6E @ 100kph].

*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

18W's (ONYOK) circulation remains very large and is having a hard time consolidating - with most of its rainbands restricted along the eastern periphery. Below is the summary of the storm's parts and its hazards affecting specific areas:

DEVELOPING RAINBANDS - affecting & spreading across Iwo To, Bonin, & Chichi Jima. Tropical Depression Conditions w/ moderate to strong winds (25-61 kph) will be expected along these bands (click here to know more about Rainbands).
24HR TOTAL RAINFALL ACCUMULATION - from 5 up to 100 mm (low to high rainfall) can be expected along areas affected by the outer & inner rainbands (see above)...with isolated amounts of 101 to 210 mm (high) along areas near the center of 18W. (click to open NOAA's eTRaP graphic).


CURRENT ITCZ/MONSOON TROUGH INTENSITY: STRONG >> Partly sunny to mostly cloudy skies with scattered to widespread rains, squalls & thunderstorms will continue across the following affected areas: MINDANAO, VISAYAS & LUZON. Calm & light to moderate Southerly to SW'ly winds (not in excess of 35 kph) will blow across the abovementioned areas.

Important Note: Please keep in mind that the above forecast outlook, effects-hazards, current monsoon intensity, & tropical cyclone watch changes every 6 to 12 hrs!



RECENT WUNDERGROUND.COM (JTWC) TRACKING CHART:

 
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RECENT MULTI-AGENCY TROPICAL CYCLONE FORECAST TRACKING CHART:

**NOT YET AVAILABLE**
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RECENT MTSAT-2 "DAY & NIGHT VISION" SATELLITE IMAGE:


> Image source:  NOAA SATELLITE CENTER: http://www.ssd.noaa.gov/mtsat/flt/t1/rgb.jpg 
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RECENT WUNDERGROUND SATELLITE ANIMATION 


> Image source:  Wunderground.com Tropical Page (http://www.wunderground.com/tropical)
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LATEST 24HR. TOTAL RAINFALL AMOUNTS / ENSEMBLE TROPICAL RAINFALL POTENTIAL (eTRaP)
:  



> Image source:  NOAA Satellite & Information Service (http://www.ssd.noaa.gov/PS/TROP/etrap.html)
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NOTE:

>> To know the meteorological terminologies and acronyms used on this update visit the ff:

   
http://typhoon2000.ph/tcterm.htm  
   
http://www.nhc.noaa.gov/aboutgloss.shtml
    http://www.nhc.noaa.gov/acronyms.shtml
__________________________________________________________________________________________

For the complete details on TD 18W (ONYOK)...go visit our website @:

>
http://www.typhoon2000.com
http://www.maybagyo.com

:: Kindly view our site's disclaimer at: 
   
http://www.typhoon2000.ph/disclaimer.htm


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