Bushman's Typhoon Blog: TD HANNA (98W)

Typhoon2000 STORM UPDATE #002

Name: TROPICAL DEPRESSION HANNA [98W]

Issued: 7:00 AM MANILA TIME (23:00 GMT) FRI 28 SEPTEMBER 2007
Next Update: 7:00 PM (11:00 GMT) FRI 28 SEPTEMBER
Source: T2K UNOFFICIAL TC ADVISORY #003
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 (98W)

SLOWS DOWN AS IT CONTINUES TO ORGANIZE

OVER THE PHILIPPINE SEA...THREATENS LUZON.

+ FORECAST OUTLOOK: HANNA is expected to track West to WNW for the next

2 days and intensify due to low shear (upper-level winds) environment

surrounding the system. It shall cross Northern or Central Luzon some-

time Saturday or Sunday (Sep 29-30).

+ EFFECTS: HANNA's westernmost outer bands spreading across the Bicol

Region and portions of Northern Samar, Northern Quezon including Poli-

llo Island. Cloudy skies with possible widespread rains can be expected

along these bands. People living around the slopes of Mayon Volcano in

Albay especially along the area where possible LAHAR FLOWS (mixture of

volcanic mud and water) are located - must stay alert as moderate to

heavy rains are possible today. Flash floods and mudslides are imminent

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

areas. Precautionary measures must be initiated as the depression

approaches.

+ CURRENT ITCZ/MONSOON INTENSITY: Active ITCZ (Monsoon Trough) embedded

along the wet-phase of the Madden-Julian Oscillation (MJO) will continue

to bring cloudy skies with rainshowers & thunderstorms across the Phili-

ppines becoming more frequent over the eastern & central sections of the

country. Landslides and flooding is likely to occur along steep mountain

slopes, river banks, low-lying & flood-prone areas of the affected areas.

Southwest (SW) Monsoon enhanced by HANNA, currently affecting Western &

Southern Mindanao, Palawan and Sulu Sea.

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) 28 SEPTEMBER
LOCATION OF CENTER: LATITUDE 14.6º N...LONGITUDE 131.0º E {T2K SATFIX}
DISTANCE 1: 740 KM (400 NM) ENE OF VIRAC, CATANDUANES, PH

DISTANCE 2: 805 KM (435 NM) ENE OF LEGAZPI CITY, PH

DISTANCE 3: 850 KM (460 NM) ENE OF NAGA CITY, PH

DISTANCE 4: 1,065 KM (575 NM) EAST OF METRO MANILA, PH

MAX SUSTAINED WINDS [1-MIN AVG]: 55 KM/HR (30 KTS)
PEAK WIND GUSTS: 75 KM/HR (40 KTS)
SAFFIR-SIMPSON SCALE: N/A
MINIMUM CENTRAL PRESSURE (est.): 1000 MILLIBARS (hPa)
RECENT MOVEMENT: WEST @ 20 KM/HR (11 KTS)
GENERAL DIRECTION: EASTERN LUZON
STORM'S SIZE (IN DIAMETER): ... KM (... NM)/N/A
MAX WAVE HEIGHT**: 10 FEET (3.0 METERS)

PHILIPPINE STORM SIGNALS*:
#01 - CATANDUANES, CAMARINES SUR, CAMARINES NORTE, POLILLO ISLAND,

NORTHERN QUEZON, AURORA, QUIRINO, ISABELA & CAGAYAN.

REMARKS: 2 AM (18 GMT) 28 SEPTEMBER POSITION: 14.4N 132.0E.
^...(more)
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PAGASA CURRENT POSITION, MOVEMENT AND INTENSITY (10-min. ave.):

> 4 AM (20 GMT) 28 SEPTEMBER: 14.7N 129.0E / WNW @ 28 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 PAGASA 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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