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Posts tagged Lesser Antilles

Tropical Depression 12L Strengthens into Tropical Storm Leslie

12.7N 46.1W

August 31st, 2012 Category: Tropical Storms

Tropical Storm Leslie (12L) – August 30th, 2012

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Track of Tropical Storm Leslie (12L) - August 30th, 2012 © Univ. of Wisconsin

Track of TS 12L

A well-defined area of low pressure became organized enough to be declared as Tropical Depression Twelve on August 30. It strengthened to become Tropical Storm Leslie just three hours after formation, becoming the second earliest twelfth named storm in the Atlantic basin, surpassed only by Luis of 1995.

As of 11 p.m. EDT August 30 (0300 UTC August 31), Tropical Storm Leslie (12L) is located within 20 nautical miles of 14.7°N 46.8°W, about 1010 mi (1625 km) east of the Lesser Antilles. Maximum sustained winds are 45 knots (50 mph, 85 km/h), with stronger gusts. Minimum central pressure is 1002 mbar (hPa; 29.59 InHg), and the system is moving west at 16 kt (18 mph, 30 km/h). Tropical storm force winds extend outward up to 45 miles (75 km) from the center of Leslie.

Low Pressure System in Atlantic Ocean Has High Change of Becoming Tropical Storm

10.0N 43.3W

August 9th, 2012 Category: Tropical Storms

Low Pressure System – August 9th, 2012

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Low Pressure System - August 9th, 2012 © Univ. of Wisconsin

Low Pressure System

A well-defined low pressure system is located midway between the Cape Verde islands and the Lesser Antilles.

A small area of showers and thunderstorms is becoming more organized around the center of circulation, and upper-level winds appear conducive for a tropical depression to form later today or tonight. This system has a high chance (80 percent) of becoming a tropical cyclone during the next 48 hours as it moves westward at about 15 mph.

Terrain of the British and U.S. Virgin Islands

18.4N 64.6W

January 20th, 2012 Category: Mountains

Puerto Rico - January 3rd, 2012

This orthorectified wide-swath ASAR image shows the Virgin Islands, the eastern island group of the Leeward Islands. The Leeward Islands are the northern part of the Lesser Antilles, which form the border between the Caribbean Sea and the Atlantic Ocean. Politically, the eastern islands form the British Virgin Islands and the western ones form the United States Virgin Islands.

Here, Puerto Rico is partially visible at the left edge. The island southeast of Puerto Rico is Vieques, an island-municipality of Puerto Rico. The island near the bottom edge is Saint Croix, one of the U.S. Virgin Islands. The remaining islands above are divided among the British and U.S. Virgin Islands.

Most of the islands are volcanic in origin and have a hilly, rugged terrain. Anegada, one of the British Virgin Islands, is geologically distinct from the rest of the group and is a flat island composed of limestone and coral. Saint Croix, the largest of the US Virgin Islands, also has a flatter terrain.

Katia (12L) Weakens from Hurricane to Tropical Storm, but Could Regain Strength

18.6N 62.3W

September 3rd, 2011 Category: Tropical Storms

Tropical Storm Katia (12L) - September 3rd, 2011

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Track of TS 12L  - September 3rd, 2011 © Univ. of Wisconsin

Track of TS 12L

The center of Tropical Storm Katia (12L) is located near latitude 19.9 north, longitude 56.8 west. Katia is moving toward the west-northwest near 10 mph (17 km/h) and this general motion is expected to continue through Monday.

Maximum sustained winds have decreased to near 70 mph (110 km/h) with higher gusts. Fluctuations in intensity are possible over the next day or so, and Katia could re-strengthen back to a hurricane at any time.

Tropical storm force winds extend outward up to 140 miles (220 km) from the center. Estimated minimum central pressure is 993 mb (29.32 inches).

Hazards affecting land are mainly related to high surf. Swells generated by Katia are affecting the Lesser Antilles and could begin to affect Bermuda by tonight or Sunday. These swells are likely to cause life-threatening surf and rip current conditions.

Area of Convection in Caribbean Sea Near Lesser Antilles

14.6N 63.1W

August 15th, 2011 Category: Tropical Storms

Area of Convection Near Lesser Antilles - August 15th, 2011

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Track of Area of Convection - August 15th, 2011 © Univ. of Wisconsin

Track of Area of Convection

A tropical wave in the vicinity of the Lesser Antilles is producing a large area of disorganized cloudiness and showers. There are no signs of a surface circulation at this time and pressures are not falling significantly over the area.

Environmental conditions are expected to be marginally conducive for development of this system during the next couple of days as it moves westward at 15 to 20 mph over the caribbean sea. This system has a low chance (20 percent) of becoming a tropical cyclone during the next 48 hours.

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