Wednesday, September 16, 2009

Super Typhoon CHOI-WAN (15W) - Update #010

 


for Tuesday, 15 September 2009 [7:18 PM PST]

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

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


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

+ USA (JTWC/1-min avg): 240 km/hr
+ Beijing (NMC/2-min avg): 220 km/hr
+ Japan (JMA/10-min avg): 175 km/hr
+ Korea (KMA/10-min avg): 175 km/hr

SUPER TYPHOON CHOI-WAN [15W/0914]
T2K E-MAIL ADVISORY NUMBER 010

6:00 PM PST (10:00 GMT) Tue 15 September 2009
Source: T2K ANALYSIS / JTWC WARNING #014
View: Advisory Archives (2004-2009)

  • Dangerous CHOI-WAN (15W) becomes the 1st Super Typhoon of 2009...now passing over the northernmost Marianas.

    *Residents and visitors along the Iwo To and Chichi Jima Islands 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 continue moving on a NW to NNW for the next 12 to 24 hours and still intensify, reaching Category 5 strength of 260 kph by tomorrow afternoon. The 2 to 5-day Long-Range Forecast shows the howler recurving northward to NNE-ward w/ its wind intensity starting to weaken. CHOI-WAN shall pass about 100 km to the west of Iwo To on Friday morning Sep 18 and about 85 km to the west of Chichi Jima on Saturday Sep 19. This strong tropical cyclone shall continue to decay as it accelerate further NNE across the cooler part of the Northwestern Pacific Ocean.

    + Effects: CHOI-WAN's dangerous main core (eye & eyewall) is about to leave the island of Alamagan...with its inner rainbands still spreading across Saipan and Agrihan Islands. Moderate to heavy rains with winds of more than 100 kph w/ passing heavy squalls can be expected within the inner bands. Typhoon conditions w/ winds of more than 150 kph can be felt along the path of CHOI-WAN, particularly over Alamagan Island & nearby islets. Outer rainbands of this typhoon will continue to affect the rest of the Northern & Southern Marianas. 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. Residents in low-lying areas & steep slopes must remain alert & seek evacuation for possible life-threatening flash floods, mudslides & landslides due to the anticipated heavy rains brought about by this system. Precautionary measures must be initiated if necessary. Possible coastal Storm Surge flooding of 13 to 18 feet above normal tide levels...accompanied by large and dangerous battering waves...is possible along the coastal areas of Northern Marianas. Extreme 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 Tue September 15 2009
    Location of Eye: 17.8º N Lat 145.3º E Lon
    Distance 1: 280 km (150 nm) North of Saipan, CNMI
    Distance 2: 480 km (260 nm) North of Guam, CNMI
    Distance 3: 1,090 km (588 nm) East of P.A.R.
    Distance 4: 2,445 km (1,320 nm) East of Northern Luzon, PH
    MaxWinds (1-min avg):
    240 kph (130 kts) near the center
    Peak Wind Gusts: 295 kph (160 kts)
    Saffir-Simpson Scale: Category 4
    Coastal Storm Surge Height: 13-18 feet [4.0-5.5 m]
    Central Pressure: 926 millibars (hPa)
    Recent Movement: WNW @ 19 kph (10 kts)
    General Direction: Agrihan Island
    Size (in Diameter): 1,085 km (585 nm) / Very Large
    Max Sea Wave Height (near center): 36 ft (10.9 m)
    NWS-Guam TrackMap (for Public): 7 PM PST Tue Sep 15
    JTWC Ship Avoidance TrackMap:
    06Z Tue Sep 15
    Multi-Agency Forecast TrackMap: 2 PM Tue Sep 15
    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 AM (18 GMT) 16 SEPTEMBER: 18.5N 144.4E / 250-305 KPH (Typhoon-Cat 5) / NW @ 17 KPH
  • 2 PM (06 GMT) 16 SEPTEMBER: 19.7N 142.9E / 260-315 KPH (Typhoon-Cat 5) / NW @ 17 KPH
    2 PM (06 GMT) 17 SEPTEMBER: 22.8N 140.7E / 250-305 KPH (Typhoon-Cat 5) / N @ 13 KPH
    2 PM (06 GMT) 18 SEPTEMBER: 25.4N 140.4E / 250-305 KPH (Typhoon-Cat 5) / NNE @ 17 KPH

    REMARKS: 2 AM (18 GMT) 15 SEPTEMBER POSITION: 17.6N 145.8E.
    ^ANIMATED MULTISPECTRAL SATELLITE IMAGERY SHOWS
    CONTINUED DEVELOPMENT OF DEEP CONVECTION WITH THE RADIAL EXPANSION
    OF UPPER LEVEL OUTFLOW. A TROPICAL UPPER TROPOSPHERIC TROUGH (TUTT)
    CELL IS DEVELOPING TO THE NORTHEAST OF STY 15W AND IS STARTING TO
    IMPROVE THE POLEWARD OUTFLOW CHANNEL, EVIDENT IN ENHANCED WATER
    VAPOR SATELLITE IMAGERY. THE TUTT CELL APPEARS TO BE QUASI-
    STATIONARY, SO AS STY 15W TRACKS TO THE WEST-NORTHWEST THERE WILL BE
    AN INCREASE IN THE SEPARATION DISTANCE, DECREASING THE OUTFLOW
    BENEFIT OVER THE NEXT 36 HOURS. THE PRIMARY FACTORS INCREASING OCEAN
    HEAT CONTENT AND IMPROVING UPPER LEVEL OUTFLOW ARE LEADING TO
    CONTINUED INTENSIFICATION THROUGH TAU 24 AND HELPING MAINTAIN
    INTENSITY THROUGH TAU 36...
    (
    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 STY 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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