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Honolulu and Pearl Harbour on Oahu in the Hawaiian Islands, USA

21.3N 157.8W

January 23rd, 2010 Category: Volcanoes

USA - January 2nd, 2010

USA - January 2nd, 2010

Oahu, known as “The Gathering Place”, is the third largest of the the Hawaiian Islands and most populous of the islands in the State of Hawaii. The state capital Honolulu is located on the southeast coast, and Pearl Harbor can be seen here in the center of the southern shoreline.

Including small close-in offshore islands such as Ford Island and the islands in Kaneohe Bay and off the eastern coast, it has a total land area of 596.7 square miles (1,545.4 km2), making it the 20th largest island in the United States. At its greatest dimensions, this volcanic island is 44 miles (71 km) long and 30 miles (48 km) across. The length of the shoreline is 227 miles (365 km).

The island is the result of two separate shield volcanoes: Waiʻanae and Koʻolau, with a broad “valley” or saddle (the central Oʻahu Plain) between them. The highest point is Mt. Ka’ala in the Waiʻanae Range, rising to 4,003 feet (1,220 m) above sea level.

Hurricane Neki (03C) Situated West of Hawaii

19.9N 160.4W

October 22nd, 2009 Category: Tropical Storms

Hurricane Neki - October 20th, 2009

Hurricane Neki - October 20th, 2009

Enhanced image

Enhanced image

Track of Neki - October 21st, 2009 © Univ. of Wisconsin

Track of Neki

The center of Hurricane Neki (03C) is estimated to be located within 15 nm of 18.0°N 166.8°W, about 620 mi (1000 km) west-southwest of Honolulu, Hawaii and about 410 mi (660 km) south of French Frigate Shoals.

The system has maximum sustained winds of 100 kt (115 mph, 185 km/h), with higher gusts. It has a minimum central pressure of 960 mbar (28.35 inches), and is moving north-northwest at 8 kt (9 mph, 15 km/h).

Hurricane force winds extend up to 40 miles (65 km) from the center of Neki, and tropical storm force winds up to 255 miles (410 km) from the center.

A hurricane warning is in effect for the Papahanaumokuakea National Monument from Nihoa Island to French Frigate Shoals to Maro Reef, meaning that hurricane conditions are expected in the warning area within 36 hours.

A hurricane watch also extends as far as Lisianski, meaning that hurricane conditions are possible in the watch area within the next 48 hours. The tropical storm watch for Johnston Island, however, has been discontinued.

Hilda Forecast to Become Hurricane by Tuesday

10.4N 149.7W

August 24th, 2009 Category: Tropical Storms

Tropical Storm Hilda - August 23rd, 2009

Tropical Storm Hilda - August 23rd, 2009

Enhanced image - August 23rd, 2009

Enhanced image

Track of Hilda - August 24th, 2009 © Univ. of Wisconsin

Track of Hilda

Tropical Storm Hilda is intensifying and moving westward on a track far south of Hawaii. As of 11:00 PM HST (0900 UTC) the center of the system was located about 815 miles east-southeast of Hilo, Hawaii and about 1025 miles east-southeast of Honolulu, Hawaii.

Hilda is moving toward the west near 12 mph and this general motion is expected to continue over the next two days.

Maximum sustained winds are near 65 mph with higher gusts. Slow intensification is expected in the next 48 hours, with Hilda forecast to become a hurricane by Tuesday.

Tropical storm force winds extend outward up to 80 miles from the center. Estimated minimum central pressure is 999 mb (29.50 inches).

Guillermo Weakens from Hurricane to Tropical Storm

25.1N 150.4W

August 18th, 2009 Category: Tropical Storms

Formation of Tropical Storm Vamco - August 16th, 2009

Formation of Tropical Storm Vamco - August 16th, 2009

As of 5 p.m. HST August 17 (0300 UTC August 18), the center of Tropical Storm Guillermo (10E) was estimated to be located about 525 mi (845 km) east-northeast of Hilo, Hawaii and about 660 mi (1060 km) east-northeast of Honolulu, Hawaii.

Tropical Storm Guillermo has maximum sustained winds of 40 kt (45 mph, 75 km/h), with higher gusts. The system has a minimum central pressure of 1004 mbar (29.65 inches), and is moving west-northwest at 17 kt (20 mph, 31 km/h). Tropical storm force winds extend outward up to 70 miles (115 km) from the center of Guillermo.

Felicia Expected to Hit Hawaiian Islands Today

19.3N 150.4W

August 11th, 2009 Category: Tropical Storms

Tropical Storm Felicia - August 11th, 2009

Tropical Storm Felicia - August 11th, 2009

Track of Felicia - August 11th, 2009 © Univ. of Wisconsin

Track of Felicia

The center of Felicia, which has weakened from hurricane to tropical storm status, is located about 160 miles east-northeast of Hilo, Hawaii and about 315 miles east of Honolulu, Hawaii. The system is moving toward the west near 10 mph and this motion is expected to continue for the next couple of days.

A tropical storm watch remains in effect for Oahu and for all of Maui county, which includes the islands of Maui, Kahoolawe, Lanai and Molokai.

A large swell generated by Felicia has already reached the main Hawaiian islands. This swell will build across the state through Tuesday, and on this track, the center of Felicia is expected to reach the Hawaiian islands on Tuesday with rainbands in advance of the center reaching the islands overnight. Regardless of the intensity when it reaches the islands, local heavy rainfall may occur and flash flooding remains a possibility.

Maximum sustained winds are near 40 mph with higher gusts. Tropical storm force winds extend outward up to 140 miles from the center. Estimated minimum central pressure is 1007 mb (29.74 inches). Felicia is expected to weaken over the next 48 hours.

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