Tuesday, October 09, 2012

Typhoon PRAPIROON (NINA) - Update #006


for Tuesday, 09 October 2012 [7:56 PM PhT]



Issued: 6:00 PM PhT (10:00 GMT) Tuesday 09 Oct 2012
Next Update: 6:00 AM PhT (22:00 GMT) Wednesday 10 Oct 2012

The large Typhoon PRAPIROON (NINA) has drifted slowly westward during the past 6 hours...now moving slowly west-northwest across the North Philippine Sea.

Meanwhile, rains with isolated squalls (locally known as Subasko) and thunderstorms associated with the northerly surface windflow, enhanced by Prapiroon (Nina) will continue to affect the Bicol Region and Samar Provinces today.

Residents and visitors along Extreme Northern Luzon, Taiwan and Okinawa should closely monitor the development of Prapiroon (Nina).

Do not use this for life or death decision. This update is intended for additional information purposes only. Kindly refer to your national weather agency for official warnings, advisories or bulletins.


As of 6 pm today, the cloud-filled eye of Typhoon Prapiroon (Nina) was located over the open waters of the North Philippine Sea...about 1,029 km east-southeast of Santa Ana, Cagayan or 1,065 km south-southeast of Okinawa, Japan...currently moving west to west-northwest with a forward speed of 9 km/hr.

Maximum Sustained Winds (1-min. avg) remain at 120 km/hr near the center with higher gusts. Typhoon Force Winds (118 km/hr or more) extend outward up to 30 kilometers (15 nautical miles) from the center...and Tropical Storm Force Winds (62-117 km/hr) extend outward up to 165 kilometers. These winds remain over the open sea and are not affecting any land areas. Prapiroon (Nina) is a large-sized tropical cyclone with a diameter of 890 kilometers across. The 24-hour rainfall accumulation near the center of Prapiroon (Nina) is estimated to be extreme (500 mm).


Prapiroon (Nina) is expected to continue moving slowly west-northwest during the next 24 hours with a gradual turn to the north to north-northeast through 48 hours. By 72 hours, Prapiroon (Nina) is forecast to complete its recurvature towards the northeast across the North Philippine Sea/West Pacific Ocean. On the forecast track, the core of Prapiroon (Nina) will just remain over the open sea through Friday evening.

Continued strengthening of its wind speed is expected during the next 2 days as the system continues to move over warm sea surface temperatures...and Prapiroon (Nina) could become a category 2 typhoon on Wednesday.

The following is the summary of the 3-day forecast outlook on this system:

WEDNESDAY EVENING: Moving west-northwest across the North Philippine Sea...becomes a category 2 typhoon...about 878 km east-southeast of Santa Ana, Cagayan [6PM OCT 10: 18.0N 130.5E @ 160kph].
THURSDAY EVENING: Strengthens into a category 3 typhoon, turns north to north-northeast...about 855 km east-southeast of Basco, Batanes [6PM OCT 11: 19.4N 130.1E @ 185kph].
FRIDAY EVENING: Weakens to a category 2 typhoon as it completes its recurvature northeastward...remains over the open sea...about 937 east of Basco, Batanes [6PM OCT 12: 20.7N 131.0E @ 175kph].

*Please be reminded that the Forecast Outlook changes every 6 hours, and the Day 3 Forecast Track have an average error of 250 km...while the wind speed forecast error, averages 35 kph per day. Therefore, a turn to the left or right of its future track and changes in its wind speed must be anticipated from time to time.


Below is the summary of the storm's parts and its hazards affecting specific areas. You can also view this image link for you to understand the parts.

CLOUD-FILLED EYE - over water (North Philippine Sea)...not affecting any land areas. Possible calm and lull conditions (with <20 kph winds) will be expected inside the eye (click here to know more about the EYE).
EYEWALL - over water (North Philippine Sea)...not affecting any land areas. Typhoon Conditions with Typhoon Force Winds (>118 kph) will be expected within this wall (click here to know more about the Eyewall).
INNER RAINBANDS - over water (North Philippine Sea)...not affecting any land areas. Tropical Storm Conditions with Tropical Storm Force Winds (62-117 kph) will be expected along these bands.
OUTER RAINBANDS - over water (North & Central Philippine Sea)...not affecting any land areas. Tropical Depression Conditions with moderate to strong winds (<62 kph) will be expected along these bands (click here to know more about Rainbands).
24HR TOTAL RAINFALL ACCUMULATION - from 5 up to 200 mm (low to heavy rainfall) can be expected along areas affected by the outer & inner rainbands (see above)...with isolated amounts of 201 to 500 mm (heavy to extreme) along areas near the center of Prapiroon (Nina).

Important Note: Please keep in mind that the above forecast outlook, effects-hazards, current monsoon intensity, & tropical cyclone watch changes every 6 to 12 hrs!


Time/Date: 6:00 PM PhT Tue October 09, 2012
Class/Name: Typhoon Prapiroon (Nina)
Location of Eye: 17.7º N Lat 131.9º E Lon
Distance 1: 1,000 km (ENE) closer to Palanan Bay, Isabela
Distance 2: 1,029 km (ESE) closer to Santa Ana, Cagayan
Distance 3: 1,080 km (E) closer to Tuguegarao City
Distance 4: 1,085 km (ESE) closer to Basco, Batanes
Distance 5: 1,065 km (SSE) closer to Okinawa, Japan
MaxWinds (1-min avg): 120 kph near the center
Peak Wind Gusts: 150 kph
Present Movement: WNW @ 09 kph
Towards: North Philippine Sea
24hr Rainfall Accum (near center): Extreme [500 mm]
Minimum Central Pressure: 974 millibars (hPa)
Size (in Diameter): 890 km [Large]
Max Sea Wave Height (near center): 25 feet
Possible Storm Surge Height: 4-5 ft (1.2-1.7 m)

T2K StormTracks (for Public): GIF | Google Map (Flash)











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


For the complete details on TY PRAPIROON (NINA)...go visit our website @:


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