for Sunday, 29 May 2011 [7:50 AM PhT]
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Typhoon2000 (T2K) NEWS (Sunday May 29 2011):
Currently issuing 6-hrly web, twitter, SMS and e-mail updates (except 12:00 Midnight) on TS SONGDA (CHEDENG).
SONGDA (CHEDENG) MAX WIND SPEED PER AGENCY:
+ USA (JTWC/1-min avg): 110 km/hr
+ Japan (JMA/10-min avg): 130 km/hr
+ Korea (KMA/10-min avg): 130 km/hr
+ Taiwan (CWB/10-min avg): 125 km/hr
+ Beijing (NMC/2-min avg): 105 km/hr
+ Hong Kong (HKO/10-min avg): 140 km/hr
:: Click here to see Multi-Agency Forecast Tracks
TROPICAL STORM SONGDA [CHEDENG/04W/1102]
T2K PUBLIC ADVISORY NUMBER 029
6:00 AM PhT (22:00 GMT) Sun 29 May 2011
Sources: T2K Extrap Analysis/JTWC Warning #035/SatFixes
View: Advisory Archives (2004-2011)
SONGDA (CHEDENG) loses typhoon strength, downgraded to a Tropical Storm...continues to race towards the NE...starts transforming into an Extratropical Cyclone.
Residents and visitors along the Southern Coast of Japan (Kyushu-Shikoku-Honshu) should closely monitor the progress of SONGDA (CHEDENG).
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: 6:00 AM PhT Sat May 28 2011
Location of Center: 29.6º N Lat 130.5º E Lon
Distance 1: 130 km (70 nm) NNE of Naje Island
Distance 2: 225 km (122 nm) South of Kagoshima, Japan
Distance 3: 450 km (243 nm) NE of Kadena Air Base, Okinawa
Distance 4: 525 km (283 nm) SW of Kochi, Japan
MaxWinds (1-min avg): 100 kph (55 kts) near the center
Peak Wind Gusts: 130 kph (105 kts)
Present Movement: NE @ 54 kph (29 kts)
Towards: Southern Coast of Japan
24hr Rainfall Accum (near center): 120 mm (High)
Rainrate (near center): 50-80 mm/hr (Heavy)
Minimum Central Pressure: 982 millibars (hPa)
Saffir-Simpson Typhoon Scale: TS
Size (in Diameter): 775 km (420 nm) / Large
Wind Area Distribution (in Knots): Current Wind Profile
Max Sea Wave Height (near center): 31 ft (9.4 m)
Possible Storm Surge Height: 0-3 ft [0.0-0.9 m]
Wunder TrackMap (for Public): 3:00 AM JST Sun May 29
FORECAST OUTLOOK ANALYSIS (up to 2 days)*
SONGDA (CHEDENG) is forecast to continue lose tropical characteristics as it passes along the Southern Coast of Japan within the next 12 to 24 hours and will become Extratropical as it moves into the cooler waters of the North Pacific Ocean. 
THIS AFTERNOON [SUN]: Approaching the coast of Honshu, Japan...about 185 km SE of Kochi, Japan [2PM MAY 29: 32.5N 135.2E @ 95kph]. TOMORROW EARLY MORNING [MON]: Completes Extratropical (XT) transition...weakens further mcving away from the SE Coast of Honshu and into the North Pacific Ocean...about 160 km SSW of Kochi City, Japan [2AM MAY 30: 35.5N 143.4E @ 75kph].
Maximum Sustained Winds (1-min. avg) have decreased to near 100 km/hr (55 knots) with higher gusts. SONGDA (CHEDENG) is a Tropical Storm (TS) on the Saffir-Simpson Tropical Cyclone Scale. Tropical Storm Force Winds (62-117 km/hr) extend outward up to 280 kilometers (150 nautical miles) from the center. SONGDA is a large-sized tropical cyclone with a diameter of 775 kilometers (420 nautical miles).
*Please be reminded that the Forecast Outlook changes every 6 hours, and the Extended Forecast Track have an average error of 250 km on Day 3...450 km on Day 4...and 650 km on Day 5, 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
SONGDA's radial circulation continues to decay as observed on satellite imageries. Below are the summary of the typhoon's parts and its hazards affecting specific areas: CENTRAL DENSE OVERCAST (CDO) - dissipating (click here to know more about CDO). INNER RAINBANDS - spreading across Ryukyu Islands. Tropical Storm Conditions w/ Tropical Storm Force Winds (65-117 kph) can be expected along these bands. OUTER RAINBANDS - spreading across Western and Central Japan. Tropical Depression Conditions w/ moderate to strong winds (30-61 kph) can be expected along these bands (click here to know more about Rainbands). 24HR TOTAL RAINFALL ACCUMULATION - from 5 up to 50 mm (low to moderate rainfall) can be expected along the outer & inner rainbands...with isolated amounts of up to 120 mm (high) near the center of SONGDA. (click to open NOAA's eTRaP graphic). COASTAL STORM SURGE FLOODING - possible 6-8 ft [1.8-2.6 m] above normal tide levels...accompanied by large and dangerous battering waves can be expected along the coastal and beach front areas of Yaeyama-Miyakojima Islands, Okinawa-Ryukyu Islands tonight. Moderate damage is likely on this type of storm surge. Danger from Rip Currents or Rip Tides can be expected along the beach-front areas of Eastern China, Taiwan, Batanes Group, and Southern Japan. (click here to know more about Storm Surge).
CURRENT SW MONSOON INTENSITY: MODERATE >> Mostly cloudy with possible occasional rains w/ squalls can be expected along the following affected areas: WESTERN LUZON, WESTERN VISAYAS, PALAWAN, MINDORO, ROMBLON, MARINDUQUE, SOUTHERN TAGALOG PROVINCES including METRO MANILA & SUBIC BAY. Light to moderate SW to Westerly winds (not in excess of 40 kph) will blow.
$Important Note: Please keep in mind that the above forecast outlook, extended forecast, effects-hazards, current monsoon intensity, & tropical cyclone watch changes every 6 to 12 hrs!
JTWC (US NAVY & AIR FORCE) REMARKS:
REMARKS (for Meteorologists): 2 AM (18 GMT) SUN 29 MAY POSITION: 28.6N 129.2E.
*TROPICAL STORM (TS) 04W (SONGDA), LOCATED APPROXIMATELY 665 NM
SOUTHWEST OF YOKOSUKA, JAPAN, HAS WEAKENED FROM A TYPHOON AND
TRACKED NORTHEASTWARD AT 29 KNOTS OVER THE PAST SIX HOURS. ANIMATED
INFRARED SATELLITE IMAGERY SHOWS RAPID EROSION OF CONVECTION
ASSOCIATED WITH THE CYCLONE AS IT ENCOUNTERED VERY STRONG VERTICAL
WIND SHEAR AS THE MID-LATITUDE TROUGH ADVANCING FROM THE WEST LINKED
WITH THE SYSTEM. THE INITIAL POSITION IS BASED ON A COMPOSITE RADAR
REFLECTIVITY LOOP FROM AMAMI, JAPAN, WITH HIGH CONFIDENCE. THE
INITIAL INTENSITY IS SUPPORTED BY DVORAK ESTIMATES FROM PGTW, KNES,
AND RJTD. TS 04W HAS COMMENCED EXTRA-TROPICAL TRANSITION (ET )AS IT
CONTINUES TO ACCELERATE POLEWARD AND EASTWARD, EMBEDDING IN THE
BAROCLINIC ZONE. IT IS EXPECTED TO COMPLETE ET BY TAU 24. TROPICAL
STORM SONGDA WILL TRACK OFF THE PACIFIC COAST OF THE JAPANESE ISLAND
CHAIN WITH CLOSEST POINT OF APPROACH TO YOKOSUKA NEAR 50 NM. THE
AVAILABLE NUMERICAL GUIDANCE IS IN OVERALL GOOD AGREEMENT, HOWEVER,
CONSENSUS CONTUNUES TO TRACK THE VORTEX ALONG THE JAPANESE COAST,
ALBEIT MORE COASTAL THAN PREVIOUS. THIS TRACK FORECAST REMAINS
FASTER AND RIGHT OF CONSENSUS...(more)
>> SONGDA, meaning: A river in northwestern Viet Nam. Name contributed by:Viet Nam.
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LATEST WUNDERGROUND.COM TRACKING CHART:
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RECENT MULTI-AGENCY TROPICAL CYCLONE FORECAST TRACKING CHART: 
> Image source: NOAA SATELLITE CENTER: http://www.ssd.noaa.gov/mtsat/flt/t1/rgb.jpg
> Image source: Wunderground.com Tropical Page (http://www.wunderground.com/tropical)
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LATEST 24 HR. TOTAL RAINFALL AMOUNTS / ENSEMBLE TROPICAL RAINFALL POTENTIAL (eTRaP):
> Image source: NOAA Satellite & Information Service (http://www.ssd.noaa.gov/PS/TROP/etrap.html)
>> 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.srh.noaa.gov/oun/severewx/glossary.php
http://www.srh.weather.gov/fwd/glossarynation.html
http://www.nhc.noaa.gov/acronyms.shtml
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For the complete details on TY SONGDA (CHEDENG)...go visit our website @:
> http://www.typhoon2000.com
> http://www.maybagyo.com
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