Monday, September 14, 2009

Typhoon CHOI-WAN (15W) approaching Northern Marianas...[Update #007]

 


for Monday, 14 September 2009 [1:27 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): 140 km/hr
+ Korea (KMA/10-min avg): 140 km/hr
+ Japan (JMA/10-min avg): 130 km/hr
+ Taiwan (CWB/10-min avg): 125 km/hr
+ Beijing (NMC/2-min avg): 120 km/hr

TYPHOON CHOI-WAN [15W/0914]
T2K E-MAIL ADVISORY NUMBER 007

12:00 PM PST (04:00 GMT) Mon 14 September 2009
Source: T2K ANALYSIS / JTWC WARNING #009
View: Advisory Archives (2004-2009)

  • Typhoon CHOI-WAN (15W) continues to pick-up strength over the warm seas of the Western Pacific Ocean...moving closer to Saipan and Northern Marianas.

    *Residents and visitors along the Commonwealth of Northern Mariana Islands particularly Saipan and Pagan 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 track WNW and intensify further into a Category 2 Typhoon today and pass in between the islands of Saipan and Pagan tomorrow morning. The 2 to 5-day Long-Range Forecast shows CHOI-WAN continuing on its WNW motion, intensifying further to Category 4 w/ winds of 220 kph on Friday, Sep 18. CHOI-WAN shall start recurving to the North to NNE late Friday upon nearing the northeastern portion of the Philippine Area of Responsibility (PAR)...It shall be about 250 km west of Iwo To on Saturday Sep 19.

    + Effects: CHOI-WAN's outer rainbands now spreading across the whole of Marianas, Guam-Rota, and portions of eastern Caroline Islands...its inner rainbands has started to affect Saipan and Pagan Islands. Moderate to heavy rains with winds of 60-100 kph w/ passing heavy squalls can be expected within the inner bands...turning later into Typhoon conditions. 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.

    [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: 12:00 PM PST Mon September 14 2009
    Location of Center: 15.6º N Lat 148.0º E Lon
    Distance 1: 250 km (135 nm) East of Saipan, CNMI
    Distance 2: 415 km (225 nm) NE of Guam, CNMI
    Distance 3: 1,390 km (750 nm) East of P.A.R.
    Distance 4: 2,755 km (1,488 nm) East of Luzon, PH
    MaxWinds (1-min avg):
    140 kph (75 kts) near the center
    Peak Wind Gusts: 165 kph (90 kts)
    Saffir-Simpson Scale: Category 1
    Coastal Storm Surge Height: 4-5 feet [1.2-1.7 m]
    Central Pressure: 967 millibars (hPa)
    Recent Movement: WNW @ 05 kph (03 kts)
    General Direction: Saipan-Pagan Islands
    Size (in Diameter): 775 km (420 nm) / Large
    Max Sea Wave Height (near center): 20 ft (6.0 m)
    NWS-Guam TrackMap (for Public): 11 AM PST Mon Sep 14
    JTWC Ship Avoidance TrackMap:
    00Z Mon Sep 14
    Multi-Agency Forecast TrackMap: 11 AM Mon Sep 14
    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:

    8 PM (12 GMT) 14 SEPTEMBER: 16.2N 147.2E / 160-195 KPH (Typhoon-Cat 2) / NW @ 13 KPH
  • 8 AM (00 GMT) 15 SEPTEMBER: 17.0N 145.9E / 165-205 KPH (Typhoon-Cat 2) / NW @ 15 KPH
    8 AM (00 GMT) 16 SEPTEMBER: 18.9N 142.9E / 195-240 KPH (Typhoon-Cat 3) / WNW @ 17 KPH
    8 AM (00 GMT) 17 SEPTEMBER: 20.3N 139.6E / 215-260 KPH (Typhoon-Cat 4) / NW @ 11 KPH

    REMARKS: 8 AM (00 GMT) 14 SEPTEMBER POSITION: 15.7N 148.1E.
    ^RECENT ANIMATED MULTISPECTRAL IMAGERY SHOWS THAT MULTIPLE
    SPIRAL BANDS HAVE WRAPPED TIGHTLY INTO THE CONSOLIDATED CENTER
    OF TYPHOON CHOI-WAN TO FORM A BANDING EYE APPROXIMATELY 25 NM IN
    DIAMATER. WATER VAPOR IMAGERY INDICATES THAT THE SYSTEM STILL HAS
    VAST EQUATORWARD OUTFLOW AND A WELL-DEFINED POLEWARD OUTFLOW CHANNEL
    INTO A TROPICAL UPPER TROPOSPHERIC TROUGH (TUTT) CELL TO THE EAST.
    UPPER-LEVEL ANALYSIS REVEALS THAT THE TYPHOON HAS A FULLY-DEVELOPED
    ANTICYCLONE ALOFT AND IS IN AN AREA OF MINIMAL VERTICAL WIND SHEAR.
    OVER THE LAST 06 TO 12 HOURS, TY CHOI-WAN HAS SLOWED IN FORWARD
    MOTION AND DIPPED TO THE SOUTHWEST AS THE MID-LATITUDE TROUGH
    DIGGING EAST OF JAPAN HAS SERVED TO WEAKEN THE EASTERN SUBTROPICAL
    RIDGE (STR) ANCHORED EAST OF THE DATE LINE AND CAUSE IT TO RETRACT
    SOMEWHAT EAST...
    (
    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: 
       
    http://www.typhoon2000.ph/disclaimer.htm


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