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Posts tagged Saipan

Tropical Storm 13W Expected to Reach Typhoon Strength in 2-3 Days

September 21st, 2010 Category: Tropical Storms

Tropical Storm 13W - September 20th, 2010

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Track of TS 13W - September 20th, 2010 © Univ. of Wisconsin

Track of TS 13W

Tropical Storm 13W, located approximately 190 nautical miles north of Saipan, has tracked west-southwestward at 04 knots over the past six hours. Maximum significant wave height at is 12 feet.

The system will continue to strengthen slowly, and is expected to be at typhoon strength in 2-3 days’ time. The maximum intensity, upon passing Iwo To, is anticipated at 95 knots. A turn to the northeast will be accompanied by extra-tropical transitioning.

Super Typhoon Parma (19W) Approaches Philippines

10.4N 131.4E

October 1st, 2009 Category: Tropical Cyclones

Super Typhoon Parma (19W) - October 1st, 2009

Super Typhoon Parma (19W) - October 1st, 2009

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Track of Parma - October 1st, 2009 © Univ. of Wisconsin

Track of Parma

Super Typhoon Parma (19W), located approximately 615 nautical miles east-southeast of Manila, Philippines, has tracked west-northwestward at 15 knots over the past six hours. Maximum significant wave height is 28 feet.

Meanwhile, Typhoon Melor (20W) has tracked northwestward at 5 knots over the past six hours, and is now located approximately 440 nautical miles east-southeast of Saipan.

Please click here for a previous article on both typhoons.

Typhoon Parma and Tropical Storms Melor and 18W North of Papua-New Guinea

10.2N 151.1E

October 1st, 2009 Category: Tropical Cyclones, Tropical Storms

Tropical Storm Melor - September 29th, 2009

Tropical Storm Melor - September 29th, 2009

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Track of 18W, 19W and 20W - September 30th, 2009 © Univ. of Wisconsin

Track of 18W, 19W and 20W

Three tropical storms of varying intensities can be found north of Papua New Guinea and Australia. The main image focuses on Tropical Storm Melor, while the animated imagery includes all three (from left to right): Typhoon Parma, Tropical Storm 18W and Tropical Storm Melor.

Tropical Storm 18W is located approximately 70 nautical miles east-southeast of Guam. It has tracked west-northwestward at 15 knots over the past six hours. Maximum significant wave height is 17 feet.

Typhoon Parma (19W) is situated about 160 nautical miles northeast of Palau. The system has tracked northwestward at 11 knots over the past six hours. Parma has been upgraded to typhoon status based on intensity estimates by PGTW, RJTD and KNES, along with a microwave eye-like feature seen in an SSMI image. Maximum significant wave height is 18 feet.

Finally, Tropical Storm Melor (20W), located approximately 605 nautical miles east-southeast of Saipan, has tracked west-northwestward at 14 knots over the past six hours. The system’s maximum significant wave height is 15 feet.

Super Typhoon Choi-Wan

18.6N 146.9E

September 16th, 2009 Category: Tropical Cyclones

Super Typhoon Choi-Wan - September 16th, 2009

Super Typhoon Choi-Wan - September 16th, 2009

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Track of Choi-Wan - September 16th, 2009 © Univ. of Wisconsin

Track of Choi-Wan

Super Typhoon 15W Choi-Wan, located approximately 250 nm north-northwest of Saipan, has tracked west-northwestward at 09 knots over the last 06 hours.

Recent animated multispectral satellite imagery shows an impressive system with deep convective banding wrapping into a center with a well defined eye. Intensity is based on estimates from PGTW, KNES and RJTD.

Choi-Wan has tracked along the southwestern periphery of a mid-level subtropical ridge (STR) that extends from northeast of Choi-Wan into the vicinity of Iwo To.

Track speeds have remained fairly consistent over the past 12 hours, ranging from 08 to 10 knots. A tropical upper tropospheric trough (TUTT) to the northeast has continued to provide good eastward outflow, in addition to an upper level point source anticyclone over Choi-Wan that has been providing strong radial outflow over the past 24 hours.

The multiple outflow mechanisms in concert with high values of ocean heat content (OHC) and sea surface temperatures (SST) have allowed for Choi-Wan to intensify further over the past 12 hours.

Typhoon Choi-Wan Forecast to Intensify

15.9N 149.0E

September 14th, 2009 Category: Tropical Cyclones

Typhoon Choi-Wan - September 13th, 2009

Typhoon Choi-Wan - September 13th, 2009

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Track of Choi-Wan - September 14th, 2009 © Univ. of Wisconsin

Track of Choi-Wan

Typhoon Choi-Wan (15W), located approximately 115 nautical miles east-northeast of Saipan, in the Northern Mariana Islands, has tracked west-northwestward at 3 knots over the past six hours.

Animated multispectral imagery shows deep convective bands wrapping into a well-defined low level circulation center, visible along the left edge of the image. Animated water vapor imagery shows excellent dual outflow channels enhanced by a tropical upper tropospheric trough to the north and a mesoscale anticyclone just to the east of the system.

TY 15W is tracking along the southern periphery of a mid-level subtropical ridge to the north in a corridor of low vertical wind shear and warm sea surface temperatures. The current position is derived from multiple agency fixes and from a high resolution visible image showing an eye with a thin cirrus canopy. Typhoon Choi-Wan is expected to move in a more northwestward direction as the steering ridge weakens with the approach of two mid-latitude troughs from the northwest.

The current intensity is based on Dvorak estimates averaging T4.5. The system is forecast to further intensify into a very strong typhoon (in excess of 100 knots) as the environment remains favorable for development. Maximum significant wave height is 27 feet.