Saturday, September 12, 2009

TD 15W (UNNAMED) newly-formed east of Saipan... [Update #001]


for Saturday, 12 September 2009 [1:09 PM 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 TD 15W (UNNAMED).


+ Japan (JMA/10-min avg): 55 km/hr
+ USA (JTWC/1-min avg): 45 km/hr


12:00 PM PST (04:00 GMT) Sat 12 September 2009
View: Advisory Archives (2004-2009)

  • The strong Tropical Disturbance (LPA) east of Saipan-Guam Area, over the Western Pacific Ocean has developed into Tropical Depression 15W (UNNAMED) threatens Saipan and the Northern Mariana Islands as it rapidly intensifies.

    *Residents and visitors along the Northern Mariana Islands particularly Saipan should closely monitor the progress of 15W.

    *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: 15W is expected to turn WNW to Westward and intensify within in the next 12 to 24 hours. The 2 to 5-day Long-Range Forecast shows 15W continuing moving on a barely westerly track...reaching Typhoon strength on Monday Sep 14. It shall pass over or very close to Saipan Monday evening and shall be west of Northern Marianas on Tuesday morning Sep 15. This tropical cyclone shall be approaching the Philippine Area of Responsibility (PAR) on Thursday Sep 17 as it track starts to turn more to the WNW.

    + Effects: 15W's westernmost developing outer rainbands approaching the Northern Marianas. On and off rains can be expected across the island chain beginning late this afternoon thru the evening. 1-day rainfall accumulations of 50 up to 200 mm can be expected along 15W'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: 12:00 PM PST Sat September 12 2009
    Location of Center: 14.6º N Lat 152.6º E Lon
    Distance 1: 745 km (402 nm) ESE of Saipan, CNMI
    Distance 2: 850 km (460 nm) ENE of Guam, CNMI
    Distance 3: 1,895 km (1,023 nm) East of P.A.R.
    Distance 4: 3,040 km (1,640 nm) East of Luzon
    MaxWinds (1-min avg):
    55 kph (30 kts) near the center
    Peak Wind Gusts: 75 kph (40 kts)
    Saffir-Simpson Scale: Tropical Depression
    Coastal Storm Surge Height: 0 feet [0 m]
    Central Pressure: 1000 millibars (hPa)
    Recent Movement: NW @ 20 kph (11 kts)
    General Direction: Northern Mariana Islands
    Size (in Diameter): 600 km (325 nm) / Average
    Max Sea Wave Height (near center): 9 ft (2.7 m)
    Wunder TrackMap (for Public): 8 AM PST Sat Sep 12
    JTWC Ship Avoidance TrackMap:
    00Z Sat Sep 12
    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) 12 SEPTEMBER: 14.6N 151.4E / 65-85 KPH (Tropical Storm) / W @ 15 KPH
  • 8 AM (00 GMT) 13 SEPTEMBER: 14.8N 149.7E / 85-100 KPH (Tropical Storm) / W @ 11 KPH
    8 AM (00 GMT) 14 SEPTEMBER: 15.1N 147.0E / 120-150 KPH (Typhoon-Cat 1) / W @ 11 KPH
    8 AM (00 GMT) 15 SEPTEMBER: 15.5N 144.7E / 140-165 KPH (Typhoon-Cat 1) / W @ 15 KPH

    REMARKS: 8 AM (00 GMT) 12 SEPTEMBER POSITION: 14.3N 153.3E.






    > Image source:  NOAA SATELLITE CENTER 


    > Image source: (

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

    >> To know the meteorological terminologies and acronyms used on this update visit the ff:


    For the complete details on TD 15W (UNNAMED)...go visit our website @:


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