Bushman's Typhoon Blog: TD HANNA (90W)

Typhoon2000 STORM UPDATE #006

Name: TROPICAL DEPRESSION HANNA [90W]

Issued: 7:00 AM MANILA TIME (23:00 GMT) SUN 30 SEPTEMBER 2007
Next Update: 7:00 PM (11:00 GMT) SUN 30 SEPTEMBER
Source: JMA TC ADVISORY (29/2100Z)
Note: Kindly refer to your country's official warnings or bulletins. This update is for additional information purposes only.

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TROPICAL DEPRESSION HANNA (90W) TRYING TO CONSOLIDATE OVER THE

SOUTH

CHINA SEA WHILE MOVING UNDER MODERATE WIND SHEAR CONDITIONS...MAY BE

A BIG THREAT TO VIETNAM IN THE COMING DAYS.

+ FORECAST OUTLOOK: HANNA is expected to continue moving West to WSW

across the South China Sea within 12-24 hours. It is likely to gain

strength as soon as it moves across favorable atmospheric conditions
along the South China Sea. The 3 to 5-day forecast shows HANNA beco-

ming a strong Tropical Cyclone affecting the eastern coast of Vietnam.

Watch out for more forecast outlook soon.

+ EFFECTS: HANNA's rain bands is now well over the South China Sea,

however, the SW outermost bands is currently approaching Vietnam,

which is also a part of the SW Monsoon. Cloudy skies with passing

light to moderate and sometimes heavy downpour can be expected along

Hanna's outer bands. Flash floods and mudslides are imminent along

river banks, low-lying and mountainous regions of the affected areas.

+ CURRENT ITCZ/MONSOON INTENSITY: Moderate to strong Southwest (SW)

Monsoon enhanced by HANNA will continue to bring cloudy skies with

rains & South to SW'ly winds of 20 km/hr or higher across Western

Philippines becoming more frequent over NCR, Western Luzon, Western

Visayas, Southern Luzon and Bicol Region. Landslides and flooding

is likely to occur along steep mountain slopes, river banks, low-

lying & flood-prone areas of the affected areas.

Important Note: Please keep in mind that the above forecast outlook,
effects & current monsoon intensity, and tropical cyclone watch changes
every 06 to 12 hours!
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TIME/DATE: 5:00 AM MANILA TIME (21:00 GMT) 30 SEPTEMBER
LOCATION OF CENTER: LATITUDE 15.4º N...LONGITUDE 117.0º E
DISTANCE 1: 360 KM (195 NM) WSW OF DAGUPAN CITY, PH

DISTANCE 2: 400 KM (215 NM) WSW OF BAGUIO CITY, PH

DISTANCE 3: 320 KM (173 NM) WNW OF IBA, ZAMBALES, PH

DISTANCE 4: 360 KM (195 NM) WNW OF SUBIC BAY, PH

DISTANCE 5: 450 KM (245 NM) NW OF METRO MANILA, PH

MAX SUSTAINED WINDS [10-MIN AVG]: 55 KM/HR (30 KTS)
PEAK WIND GUSTS: 85 KM/HR (45 KTS)
SAFFIR-SIMPSON SCALE: N/A
MINIMUM CENTRAL PRESSURE (est.): 996 MILLIBARS (hPa)
RECENT MOVEMENT: WSW @ 19 KM/HR (10 KTS)
GENERAL DIRECTION: VIETNAM
STORM'S SIZE (IN DIAMETER): 630 KM (340 NM)/AVERAGE
MAX WAVE HEIGHT**: 10 FEET (3.0 METERS)
VIEW TRACKING MAP: 5 AM MANILA TIME SUN SEPTEMBER 30

PHILIPPINE STORM SIGNALS*:

#01 - NOW LOWERED.

REMARKS: 2 AM (18 GMT) 30 SEPTEMBER POSITION: 16.0N 117.3E.
^...(more)
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PAGASA CURRENT POSITION, MOVEMENT AND INTENSITY (10-min. ave.):

> 4 AM (20 GMT) 30 SEPTEMBER: 16.1N 117.0E / WSW @ 22 KPH / 55 kph

:: For the complete PAGASA bulletin/track, kindly visit their website at:
http://www.pagasa.dost.gov.ph/wb/tcupdate.shtml

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RECENT TRACKING CHART:

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RECENT MTSAT-1R SATELLITE IMAGE:

> Image source: Digital-Typhoon.org (Nat'l. Institute of Informatics) (http://www.digital-typhoon.org)
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NOTES:

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

* - Based on PAGASA's Philippine Storm Warning Signals,
      # 4 being the highest. Red letters indicate new areas
      being hoisted. For more explanations on these signals,
      visit: http://www.typhoon2000.ph/signals.htm

** - Based on the Tropical Cyclone's Wave Height near
      its center.
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>> 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
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