Saturday, September 19, 2009

Typhoon CHOI-WAN (15W) passing west of Iwo To... [Update #019]

 


for Friday, 18 September 2009 [6:08 PM PST]

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Typhoon2000 (T2K) NEWS (Sun September 13 2009):

Currently issuing 6-hrly advisories (except 12:00 AM) on TY CHOI-WAN (15W).


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

+ USA (JTWC/1-min avg): 205 km/hr
+ Beijing (NMC/2-min avg): 180 km/hr
+ Hong Kong (HKO/10-min avg): 175 km/hr
+ Taiwan (CWB/10-min avg): 160 km/hr
+ Japan (JMA/10-min avg): 150 km/hr
+ Korea (KMA/10-min avg): 150 km/hr

TYPHOON CHOI-WAN [15W/0914]
T2K E-MAIL ADVISORY NUMBER 019

6:00 PM PST (10:00 GMT) Fri 18 September 2009
Source: T2K ANALYSIS / JTWC WARNING #026
View: Advisory Archives (2004-2009)

  • Typhoon CHOI-WAN (15W) continues to accelerate northward...now passing due west of Iwo To.

    *Residents and visitors along the Iwo To and Chichi Jima Island Group 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 is expected to recurve to the NNE to NE within the next 12 to 24 hours, passing about 230 km. west of Iwo To tonight and about 180 km. West of Chichi Jima before noontime tomorrow. It shall again regain Category 4 strength early tomorrow as soon as the developing, new eyewall replaces the old eyewall (Eyewall Replacement Cycle). Weakening trend of this typhoon will resume tomorrow afternoon. The 2 to 3-day Medium-Range Forecast shows the howler accelerating NE-ward...maintaining its decaying phase as it moves across the cooler seas of the Northwestern Pacific Ocean, just south of Kuril Islands or east of Japan and shall become Extratropical on Monday Sep 21.

    + Effects: CHOI-WAN's dangerous main core (eye & double eyewalls) remain over warm open seas of the NW Pacific...with its inner bands now spreading across Iwo To...while its outer bands affecting Chichi Jima. Tropical Storm force winds w/ rains is expected to be felt across Iwo To tonight...while rains and winds not exceeding 60 kph is likely along the outer bands. 1-day rainfall accumulations of 50 up to 250 mm can be expected along CHOI-WAN's rainbands...with isolated accumulations of up to 400 mm near the center of CHOI-WAN or along its Eyewall. Possible coastal Storm Surge flooding of 9 to 12 feet above normal tide levels...accompanied by large and dangerous battering waves...is possible along the coastal areas of Iwo To and Chichi Jima Island Group. Extensive damage is likely on this type of storm surge.

    [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 PM PST Fri September 18 2009
    Location of Eye: 24.8º N Lat 139.1º E Lon
    Distance 1: 220 km (120 nm) West of Iwo To
    Distance 2: 395 km (213 nm) WSW of Chichi Jima
    Distance 3: 415 km (225 nm) East of P.A.R.
    Distance 4: 1,130 km (610 nm) ESE of Okinawa, Japan
    MaxWinds (1-min avg):
    205 kph (110 kts) near the center
    Peak Wind Gusts: 250 kph (135 kts)
    Saffir-Simpson Scale: Category 3
    Coastal Storm Surge Height: >9-12 feet [2.7-3.9 m]
    Central Pressure: 941 millibars (hPa)
    Recent Movement: North @ 17 kph (09 kts)
    General Direction: Iwo To-Chichi Jima Islands
    Size (in Diameter): 1,000 km (540 nm) / Very Large
    Max Sea Wave Height (near center): 40 ft (12.1 m)
    NWS-Guam TrackMap (for Public): 5 PM PST Fri Sep 18
    JTWC Ship Avoidance TrackMap:
    06Z Fri Sep 18
    Multi-Agency Forecast TrackMap: 2 PM Fri Sep 18
    TSR Wind Probabilities: Current to 3-days Ahead
    Zoomed Satellite Pic:
    Near Real-Time
    Wunderground Animation: 6-12 hr. GIF Loop

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

    2 AM (18 GMT) 19 SEPTEMBER: 26.2N 139.4E / 215-260 KPH (Typhoon-Cat 4) / NE @ 30 KPH
  • 2 PM (06 GMT) 19 SEPTEMBER: 28.8N 141.4E / 195-240 KPH (Typhoon-Cat 3) / NE @ 35 KPH
    2 PM (06 GMT) 20 SEPTEMBER: 35.6N 149.2E / 140-165 KPH (Typhoon-Cat 1) / NE @ 55 KPH
    2 PM (06 GMT) 21 SEPTEMBER: 42.0N 162.3E / 75-95 KPH (Extratropical Cyclone) / --- @ -- KPH

    REMARKS: 2 AM (06 GMT) 18 SEPTEMBER POSITION: 24.1N 138.8E.
    ^ANIMATED INFRARED SATELLITE IMAGERY SHOWS A VERY
    WELL-DEFINED EYE WITH A SECONDARY OUTER EYEWALL. THIS IS
    CORROBORATED BY AN 180422Z AMSRE MICROWAVE IMAGE DEPICTING AN
    AXIS-SYMMETRIC DOUBLE EYEWALL WITH HIGH SPATIAL DETAIL.
    ENVIRONMENTAL ANALYSIS INDICATES TY 15W IS NOW CRESTING THE WESTERN
    EDGE OF THE MID-LEVEL SUBTROPICAL RIDGE AXIS IN A CORRIDOR OF LOW
    VERTICAL WIND SHEAR AND WARM SEA SURFACE TEMPERATURES (WELL IN
    EXCESS OF 28C). ANIMATED WATER VAPOR IMAGERY SHOWS OVERALL
    CONVECTION HAS SHALLOWED, ALBEIT THE SYSTEM HAS BECOME MORE COMPACT
    AND SYMMETRICAL. FURTHERMORE, THE TYPHOON IS EXHIBITING EXCELLENT
    RADIAL OUTFLOW. THE CURRENT INTENSITY OF 110 KNOTS IS BASED ON MULTI-
    AGENCY DVORAK FIXES RANGING FROM T5.0 TO T6.0. TYPHOON CHOI-WAN IS
    EXPECTED TO SLIGHTLY INTENSIFY OVER THE NEXT 12 HOURS AS POLEWARD
    OUTFLOW FURTHER IMPROVES WITH THE ONSET OF STRONG WESTERLY WINDS.
    BEYOND TAU 12, THE CYCLONE WILL WEAKEN AT A SLOWER PACE THAN NORMAL,
    TYPICAL WITH SYSTEMS UNDERGOING EYEWALL REPLACEMENT. DURING THIS
    PHASE, TY 15W WILL RECURVE TO THE NORTHEAST, WELL EAST OF MAINLAND
    JAPAN, AND RAPIDLY TRANSITION INTO AN EXTRA-TROPICAL SYSTEM WITH
    COMPLETE TRANSITION BY TAU 72...
    (
    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 TY CHOI-WAN (15W)...go visit our website @:

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

    :: Kindly view our site's disclaimer at: 
       
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