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

Typhoon2000 STORM UPDATE #004

Name: TROPICAL DEPRESSION HANNA [98W]

Issued: 8:00 AM MANILA TIME (00:00 GMT) SAT 29 SEPTEMBER 2007
Next Update: 7:00 PM (11:00 GMT) SAT 29 SEPTEMBER
Source: T2K UNOFFICIAL TC ADVISORY #007
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)

MAY BRIEFLY BECOME A TROPICAL STORM

BASED ON THE LATEST 6:57 AM SATELLITE IMAGERY, BEFORE MAKING LANDFALL

OVER AURORA THIS MORNING.

+ FORECAST OUTLOOK: HANNA is expected to move WNW within 12 hours and

cross Luzon via Aurora this morning and shall pass over the provinces

of Quirino, Benguet & La Union this afternoon. The ill-defined center

of HANNA shall be off the coast of La Union tonight and be over the

South China Sea early tomorrow morning (Sunday Sep 30).

+ EFFECTS: HANNA's rain bands continues to spread across the island of

Luzon becoming more intense along the Eastern and Central sections

particularly along mountain slopes of Sierra Madre Mountains (along

Northern Quezon-Aurora-Isabela Area). 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 po-

ssible 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 con-

tinue to bring cloudy skies with rainshowers & thunderstorms across

the Philippines 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: 7:00 AM MANILA TIME (23:00 GMT) 29 SEPTEMBER
LOCATION OF CENTER: LATITUDE 15.8º N...LONGITUDE 122.9º E {T2K SATFIX}
DISTANCE 1: 85 KM (45 NM) ESE OF CASIGURAN, AURORA, PH

DISTANCE 2: 130 KM (70 NM) ENE OF BALER, AURORA, PH

DISTANCE 3: 250 KM (135 NM) NNW OF NAGA CITY, PH

DISTANCE 4: 225 KM (122 NM) NE OF METRO MANILA, PH

MAX SUSTAINED WINDS [1-MIN AVG]: 60 KM/HR (33 KTS)
PEAK WIND GUSTS: 80 KM/HR (43 KTS)
SAFFIR-SIMPSON SCALE: N/A
MINIMUM CENTRAL PRESSURE (est.): 1000 MILLIBARS (hPa)
RECENT MOVEMENT: WNW @ 22 KM/HR (12 KTS)
GENERAL DIRECTION: AURORA-QUIRINO AREA
STORM'S SIZE (IN DIAMETER): 555 KM (300 NM)/N/A
MAX WAVE HEIGHT**: 10 FEET (3.0 METERS)
VIEW TRACKING MAP: 7 AM MANILA TIME SAT SEPTEMBER 29

PHILIPPINE STORM SIGNALS*:

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

NORTHERN QUEZON, AURORA, QUIRINO, & ISABELA.
#01 - METRO MANILA AND THE WHOLE OF LUZON.

REMARKS: 5 AM (21 GMT) 29 SEPTEMBER POSITION: 15.6N 123.9E.
^...(more)
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PAGASA CURRENT POSITION, MOVEMENT AND INTENSITY (10-min. ave.):

> 4 AM (20 GMT) 29 SEPTEMBER: 16.3N 122.8E / 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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