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

Typhoon2000 STORM UPDATE #003

Name: TROPICAL DEPRESSION HANNA [98W]

Issued: 7:00 PM MANILA TIME (11:00 GMT) FRI 28 SEPTEMBER 2007
Next Update: 7:00 AM (23:00 GMT) SAT 29 SEPTEMBER
Source: T2K UNOFFICIAL TC ADVISORY #005
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 ITS MID-LEVEL CIRCULA-

TION HAS MOVED WEST INTO LUZON, LEAVING ITS LOW-LEVEL CIRCULATION

CENTER PARTIALLY EXPOSED OVER THE PHILIPPINE SEA, JUST TO THE EAST OF

CATANDUANES ISLAND.

+ FORECAST OUTLOOK: HANNA is expected to continue tracking West to WNW

the next 2-3 days with its partially exposed LLCC moving across Northern

Bicol and Northern Quezon tomorrow morning...At this moment, a moderate

Southerly Shear (upper level winds) is likely to weaken HANNA into a

Tropical Disturbance (LPA) if the mid-level circulation continues to

separate from the LLCC.

+ EFFECTS: HANNA's outer bands now spreading across the island of Luzon

becoming more intense along the Eastern and Central sections particu-

larly along mountain slopes of Sierra Madre Mountains. Cloudy skies

with 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 lo-

cated - 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, Western Visayas, 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 PM MANILA TIME (09:00 GMT) 28 SEPTEMBER
LOCATION OF CENTER: LATITUDE 14.0º N...LONGITUDE 126.5º E {T2K SATFIX}
DISTANCE 1: 240 KM (130 NM) ENE OF VIRAC, CATANDUANES, PH

DISTANCE 2: 320 KM (173 NM) ENE OF LEGAZPI CITY, PH

DISTANCE 3: 360 KM (195 NM) ENE OF NAGA CITY, PH

DISTANCE 4: 585 KM (315 NM) ESE OF METRO MANILA, PH

MAX SUSTAINED WINDS [1-MIN AVG]: 45 KM/HR (25 KTS)
PEAK WIND GUSTS: 65 KM/HR (35 KTS)
SAFFIR-SIMPSON SCALE: N/A
MINIMUM CENTRAL PRESSURE (est.): 1003 MILLIBARS (hPa)
RECENT MOVEMENT: WSW @ 20 KM/HR (11 KTS)
GENERAL DIRECTION: NORTHERN BICOL-QUEZON AREA
STORM'S SIZE (IN DIAMETER): 555 KM (300 NM)/N/A
MAX WAVE HEIGHT**: 10 FEET (3.0 METERS)
VIEW TRACKING MAP: 5 PM MANILA TIME FRI SEPTEMBER 28

PHILIPPINE STORM SIGNALS*:

#02 - CATANDUANES, CAMARINES SUR, CAMARINES NORTE, POLILLO ISLAND,

NORTHERN QUEZON, AURORA, QUIRINO, & ISABELA.
#01 - CAGAYAN, KALINGA, MOUNTAIN PROVINCE, IFUGAO, BENGUET, NUEVA

ECIJA, NUEVA VIZCAYA, BULACAN, RIZAL, LAGUNA, CAVITE, BATANGAS,

REST OF QUEZON, MARINDUQUE, BURIAS IS., ALBAY, SORSOGON,

METRO MANILA.

REMARKS: 2 PM (06 GMT) 28 SEPTEMBER POSITION: 14.5N 128.5E.
^...(more)
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PAGASA CURRENT POSITION, MOVEMENT AND INTENSITY (10-min. ave.):

> 4 PM (08 GMT) 28 SEPTEMBER: 15.6N 125.9E / WNW @ 20 KPH / 65 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 T2K 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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