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Posts tagged 12L

Intensity of Tropical Storm Leslie (12L) Increases

September 3rd, 2012 Category: Tropical Storms

Tropical Storm Leslie (12L) – September 1st, 2012

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Track of Tropical Storm Leslie (12L) - September 2nd, 2012 © Univ. of Wisconsin

Track of TS 12L

As of 5 a.m. AST (0900 UTC) September 2, Tropical Storm Leslie (12L) is located within 30 nautical miles of 20.8°N 59.5°W, about 295 mi (475 km) NNE of the Leeward Islands.

Maximum sustained winds are 60 knots (70 mph, 110 km/h), with stronger gusts. Minimum central pressure is 994 mbar (hPa; 29.35 InHg), and the system is moving northwest at 13 kt (15 mph, 24 km/h). Tropical storm force winds extend outward up to 105 miles (165 km) from the center of Leslie.

Tropical Storm Leslie (12L) with Maximum Sustained Winds of 55 Knots – September 2nd, 2012

September 2nd, 2012 Category: Image of the day, Tropical Storms

Tropical Storm Leslie (12L) – August 31st, 2012

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Track of Tropical Storm Leslie (12L) - September 1st, 2012 © Univ. of Wisconsin

Track of TS 12L

As of 5 p.m. AST (2100 UTC) September 1, Tropical Storm Leslie (12L) is located within 30 nautical miles of 19.2°N 57.3°W, about 330 mi (530 km) east-northeast of the Leeward Islands.

Maximum sustained winds are 55 knots (65 mph, 100 km/h), with stronger gusts. Minimum central pressure is 998 mbar (hPa; 29.47 InHg), and the system is moving WNW at 16 kt (18 mph, 30 km/h). Tropical storm force winds extend outward up to 160 miles (260 km) from the center of Leslie.

Tropical Storm Leslie (12L) East of Leeward Islands

14.6N 55.3W

September 1st, 2012 Category: Tropical Storms

Tropical Storm Leslie (12L) – August 31st, 2012

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Track of Tropical Storm Leslie (12L) - August 31st, 2012 © Univ. of Wisconsin

Track of TS 12L

As of 11 p.m. AST August 31 (0300 UTC September 1), Tropical Storm Leslie (12L) is located within 30 nautical miles of 17.4°N 52.8°W, about 595 mi (995 km) east of the Leeward Islands.

Maximum sustained winds are 55 knots (65 mph, 100 km/h), with stronger gusts. Minimum central pressure is 999 mbar (hPa; 29.50 InHg), and the system is moving WNW at 18 kt (21 mph, 33 km/h).
Tropical storm force winds extend outward up to 90 miles (150 km) from the center of Leslie.

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.

Post-tropical Cyclone Katia (12L) Expected to Bring Strong Winds to British Isles

47.0N 58.7W

September 10th, 2011 Category: Tropical Storms

Post-Tropical Cyclone Katia (12L) - September 9th, 2011

Track of TS 12L  - September 10th, 2011 © Univ. of Wisconsin

Track of TS 12L

Katia loses tropical characteristics over the far North Atlantic expected to bring strong winds to the British Isles as a powerful post-tropical cyclone on Monday.

At 11:00 AM AST (1500 UTC) the center of Post-tropical Cyclone Katia (12L) was located near latitude 44.7 north, longitude 47.7 west. The system is partially visible near the USA and Canada on the right side of the main image; the animated imagery offers a complete view of the storm and its recent movement.

Katia is racing toward the east-northeast near 53 mph (85 km/h) and this general motion is expected to continue for the next couple of days. On the forecast track, this system is expected to pass over or near the northern British Isles on Monday.

Maximum sustained winds are near 80 mph (130 km/h) with higher gusts. Katia is expected to remain a strong extratropical cyclone over the next 48 hours.

Hurricane-force winds extend outward up to 80 miles (130 km) from the center and tropical-storm-force winds extend outward up to 310 miles (500 km). Estimated minimum central pressure is 954 mb (28.17 inches).

Hazards affecting land include wind, surf and rainfall. Gale- to storm-force winds are expected to affect much of the British Isles on Monday, and could cause damage to trees and
disrupt transportation and other public services. Large swells generated by Katia will continue to affect US New England areas, Altantic Canada and Bermuda today, and spread eastward into the British Isles Sunday and Monday. These swells are likely to cause life-threatening surf and rip current conditions. Total rain accumulations of 50 to 100 millimeters (2 to 4 inches) are expected over the western mountains of Scotland.