Sunday, September 13, 2009

TS CHOI-WAN (15W) - Update #003

 


for Sunday, 13 September 2009 [7:20 AM PST]

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Typhoon2000 (T2K) NEWS (Sat September 12 2009):

Now issuing 6-hrly advisories (except 12:00 AM) on the newly-formed TS CHOI-WAN (15W).


CHOI-WAN (15W) MAX WIND SPEED PER AGENCY:

+ USA (JTWC/1-min avg): 65 km/hr
+ Taiwan (CWB/10-min avg): 65 km/hr
+ Beijing (NMC/2-min avg): 65 km/hr
+ Japan (JMA/10-min avg): 65 km/hr
+ Korea (KMA/10-min avg): 65 km/hr
+ Japan (JMA/10-min avg): 65 km/hr

TROPICAL STORM CHOI-WAN [15W/0914]
T2K E-MAIL ADVISORY NUMBER 003

6:00 AM PST (22:00 GMT) Sun 13 September 2009
Source: T2K ANALYSIS / JTWC WARNING #004
View: Advisory Archives (2004-2009)

  • 15W (UNNAMED) has strengthened into a Tropical Storm and is now internationally known as CHOI-WAN.

    *Residents and visitors along the Northern Mariana Islands particularly Saipan should closely monitor the progress of CHOI-WAN.

    *Kindly refer to your local warnings & bulletins issued by your country's official weather agency. This advisory is intended for additional information purposes only.


    + Forecast Outlook: CHOI-WAN's forecast scenario has changed...now expected to move on a westward track and intensify further within in the next 12 to 24 hours. The 2 to 5-day Long-Range Forecast shows CHOI-WAN turning WNW-ward, passing north of Saipan tomorrow afternoon...reaching Typhoon strength by early Tuesday morning Sep 15. This tropical cyclone shall continue to gain intensity while maintaining its WNW track. It shall be approaching the northeastern part of the Philippine Area of Responsibility (PAR) on Friday Sep 18.

    + Effects: CHOI-WAN's southwesternmost outer rainbands is expected to reach the Northern Marianas later tonight. Occasional rains w/ passing thunderstorms can be expected across the island chain tonight. 1-day rainfall accumulations of 50 up to 200 mm can be expected along CHOI-WAN's rainbands.

    [Important Note: Please keep in mind that the above forecast outlook, effects, current monsoon intensity, & tropical cyclone watch changes every 6 to 12 hrs!] 
    Time/Date: 6:00 AM PST Sun September 13 2009
    Location of Center: 15.7º N Lat 150.0º E Lon
    Distance 1: 465 km (252 nm) East of Saipan, CNMI
    Distance 2: 615 km (332 nm) ENE of Guam, CNMI
    Distance 3: 1,605 km (867 nm) East of P.A.R.
    Distance 4: 2,980 km (1,608 nm) East of Luzon
    MaxWinds (1-min avg):
    65 kph (35 kts) near the center
    Peak Wind Gusts: 85 kph (45 kts)
    Saffir-Simpson Scale: Tropical Storm
    Coastal Storm Surge Height: 1-3 feet [0.3-0.9 m]
    Central Pressure: 996 millibars (hPa)
    Recent Movement: WNW @ 20 kph (11 kts)
    General Direction: Northern Mariana Islands
    Size (in Diameter): 925 km (500 nm) / Very Large
    Max Sea Wave Height (near center): 12 ft (3.6 m)
    Wunder TrackMap (for Public): 2 AM PST Sun Sep 13
    JTWC Ship Avoidance TrackMap:
    18Z Sat Sep 12
    Multi-Agency Forecast TrackMap: 2 AM Sun Sep 13
    TSR Wind Probabilities: Current to 5-days Ahead
    Zoomed Satellite Pic:
    Near Real-Time
    Wunderground Animation: 6-12 hr. GIF Loop

  • JTWC 12, 24, 48 & 72 HR. FORECAST & REMARKS:

    2 PM (06 GMT) 13 SEPTEMBER: 15.8N 148.9E / 85-100 KPH (Tropical Storm) / W @ 13 KPH
  • 2 AM (18 GMT) 14 SEPTEMBER: 16.0N 147.5E / 100-130 KPH (Tropical Storm) / WNW @ 09 KPH
    2 AM (18 GMT) 15 SEPTEMBER: 16.9N 145.3E / 120-150 KPH (Typhoon-Cat 1) / WNW @ 13 KPH
    2 AM (18 GMT) 16 SEPTEMBER: 18.2N 142.5E / 140-165 KPH (Typhoon-Cat 1) / WNW @ 17 KPH

    REMARKS: 2 AM (18 GMT) 13 SEPTEMBER POSITION: 15.7N 150.6E.
    ^ANIMATED INFRARED IMAGERY SHOWS MULTIPLE SPIRAL
    BANDS WRAPPING INTO DEEP, CENTRAL CONVECTION. THE IMAGERY AND UPPER-
    LEVEL ANALYSIS DEPICT GREAT RADIAL OUTFLOW. ADDITIONALLY, A POLEWARD
    OUTFLOW CHANNEL INTO A DEEPENING TROPICAL UPPER TROPOSPHERIC TROUGH
    (TUTT) CELL TO THE EAST IS QUICKLY DEVELOPING. THE MODEL AIDS ARE IN
    VERY GOOD AGREEMENT WITH THIS FORECAST AS THEY HAVE ALL STARTED TO
    SHIFT SLIGHTLY TO THE NORTH OF SAIPAN. HOWEVER, THE 12Z UPPER-LEVEL
    SOUNDING AT MINAMITORISHIMA (RJAM, 24.5N 154.0E) REPORTS EASTERLY
    WINDS THROUGHOUT THE COLUMN, INDICATING THAT THE SUBTROPICAL RIDGE
    IS STILL FIRMLY IN PLACE. THEREFORE, THIS FORECAST TAKES THE SYSTEM
    WESTWARD THROUGH TAU 36 BEFORE THE MID-LATITUDE TROUGH CURRENTLY
    OVER JAPAN SLIGHTLY WEAKENS THE SUBTROPICAL RIDGE, ALLOWING FOR A
    MORE NORTHWESTWARD TRACK THROUGH TAU 120. THE UPGRADE IN INTENSITY
    TO TROPICAL STORM STRENGTH AS WELL AS THE CURRENT POSITION ARE BASED
    ON THE 121730Z PGTW FIX AND ARE SUPPORTED BY A WELL-DEVELOPED LOW
    LEVEL SIGNATURE DEPICTED IN THE 121531Z AMSRE MICROWAVE IMAGE...
    (
    more)

    >> CHOI-WAN, meaning: Colorful CloudName contributed by: Hong Kong, China.
    __________________________________________________________________________________________________________________________________________________________

    RECENT WUNDERGROUND.COM TRACKING CHART
    :


    _________________________________________________________________________________________________________________

     
    RECENT MTSAT-1R SATELLITE IMAGE:


    > Image source:  NOAA SATELLITE CENTER 
    ____________________________________________________________________________________________________________________

    RECENT WUNDERGROUND SATELLITE ANIMATION:


    > Image source:  Wunderground.com (http://www.wunderground.com/)
    ____________________________________________________________________________________________________________________

    NOTE:
     
      ^ - JTWC commentary remarks (for Meteorologists) from their latest warning.
    __________________________________________________________________________________________

    >> 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
    __________________________________________________________________________________________

    For the complete details on TS CHOI-WAN (15W)...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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