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Typhoon Sanba (17W) Strongest Tropical Cyclone So Far in 2012 – September 18th, 2012

39.5N 129.6E

September 18th, 2012 Category: Tropical Cyclones

Typhoon Sanba (17W) – September 17th, 2012

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Track of Typhoon Sanba (17W) - September 17th, 2012 © Univ. of Wisconsin

Track of TS 17W

Typhoon Sanba (international designation: 1216, JTWC designation: 17W, PAGASA name: Karen) is currently a tropical cyclone in the Sea of Japan. Being the sixteenth named storm and tenth typhoon of the 2012 Pacific typhoon season, Sanba has been the strongest tropical cyclone worldwide in 2012. The name Sanba, which refers to the Ruins of St. Paul’s in Macau, is a transcription of São Paulo.

Tropical Storm Sanba (17W), located approximately 10 nm northwest of Taegu, South Korea, has made landfall and accelerated north-northeastward at 20 knots over the past six hours. The initial position and intensity were based on animated radar imagery from the Korean meteorological agency and from surface observations from Taegu
that reported maximum winds of 24 gusting to 40 knots.

Sanba is currently at the base of the Taebaek Mountain Range and poised to ramp up the high and very rugged terrain. Upper level analysis indicates the system is now embedded in the baroclinic zone and undergoing extratropical transition. It is expected to become a cold core low after its remnants emerge back in the Sea of Japan by TAU 12. The alternate scenario is that the system will dissipate over land.

Tropical Depression Kulap (17W) Located Near Japan

37.0N 131.0E

September 11th, 2011 Category: Tropical Storms

Tropical Depression Kulap (17W) - September 10th, 2011

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Track of TS 17W - September 10th, 2011 © Univ. of Wisconsin

Track of TS 17W

On September 8th, Tropical Storm Kulap (17W) moved into the east-northeast periphery of the Philippine Area of Responsibility (PAR) prompting the PAGASA to start issuing advisories on the system, naming it Nonoy.

However, Kulap quickly accelerated north and exited the PAR on the same evening, prompting the PAGASA to issued their final advisory on the system.

After increasing wind shear caused further weakening, the JTWC downgraded Kulap to a tropical depression late on September 8.  Early on September 10, the JMA too downgraded Kulap to a tropical depression.

Tropical Storm Kulap (17W) Moves Closer to Japan

27.2N 135.9E

September 8th, 2011 Category: Tropical Storms

Tropical Storm Kulap (17W) - September 8th, 2011

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Track of TS 17W - September 8th, 2011 © Univ. of Wisconsin

Track of TS 17W

Tropical Storm Kulap (17W), located approximately 365 nautical miles southeast of Kadena Air Base, Okinawa, has tracked northwestward at 12 knots over the past six hours. Maximum significant wave height is 12 feet.

The current forecast track from the Joint Typhoon Warning Center takes Kulap right over Kadena Air Base this weekend, moving north of Taiwan and making a final landfall south of Shanghai, China next week.

Tropical Storm Kulap (17W) Could Threaten Japan Later in Week

30.0N 138.0E

September 8th, 2011 Category: Tropical Storms

Tropical Storm Kulap (17W) - September 6th, 2011

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Track of TS 17W - September 7th, 2011 © Univ. of Wisconsin

Track of TS 17W

Tropical Storm Kulap (17W), located approximately 500 nautical miles east-southeast of Kadena Air Base, Okinawa, has tracked north-northeastward at 07 knots over the past six hours.

Maximum sustained winds are between 50 and 55 mph. Maximum significant wave height is 12 feet.

Strengthening is likely during the two days with movement becoming northwesterly or even westerly. The system could threaten Okinawa and the neighboring Ryukyu Islands late in the week, as a tropical storm or even a typhoon by Saturday.

Tropical Depression 17W Forms Northeast of Guam

23.8N 161.2E

October 22nd, 2010 Category: Tropical Storms

Tropical Depression 17W - October 20th, 2010

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Track of TD 17W

Tropical depression 17W, located approximately 780 nm northeast of Hagatna, Guam, has tracked west-northwestward at 09 knots over the past six hours. Maximum significant wave height is 10 feet.

Low level structure evident in recent microwave satellite imagery and a Dvorak intensity estimate of 30 knots indicate that TD 17W has formed just poleward of a tropical upper tropospheric (TUTT) cell.

The system is tracking west-northwestward along the southern periphery of a deep subtropical ridge to the north. This general motion is expected to continue through the next 24 hours.

Thereafter, a developing midlatitude trough to the north is expected to weaken the steering ridge and induce a poleward turn into a weak steering environment. The available numerical guidance is in good general agreement with this scenario, although there is some uncertainty in the exact track given the expectation of a weak steering setup.

Unfavorable environmental factors, including persistent upper level convergence, easterly vertical wind shear, and the introduction of drier air toward the center of TD 17W from the southeast, should prevent the system from intensifying significantly and eventually result in dissipation below the 25 knot warning threshold intensity around TAU 48.

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