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Katia (12L) Back to Category One Hurricane Strength – September 8th, 2011

25.6N 72.8W

September 8th, 2011 Category: Tropical Cyclones

Hurricane Katia (12L) - September 7th, 2011

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Track of TS 12L  - September 8th, 2011 © Univ. of Wisconsin

Track of TS 12L

The center of Hurricane Katia (12L) is located near latitude 30.8 north, longitude 70.0 west. Katia is moving toward the north-northwest near 13 mph (20 km/h).

The hurricane is expected to turn to the north by Thursday morning, followed by a north-northeastward motion with an increase in forward speed Thursday night and Friday. On the forecast track, the center of Katia will move between the east coast of the United States and Bermuda through Thursday.

Maximum sustained winds remain near 80 mph (130 km/h) with higher gusts. Katia is a category one hurricane on the Saffir-Simpson hurricane wind scale. Little change in strength is forecast during the next couple of days.

Hurricane force winds extend outward up to 70 miles (110 km) from the center, and tropical storm force winds extend outward up to 205 miles (335 km). A sustained wind of 67 mph with a gust to 83 mph was recently reported. Estimated minimum central pressure is 982 mb (29.00 inches).

Hazards affecting land include surf, wind and rainfall. Large swells generated by Katia will continue to affect most of the east coast of the United States, Bermuda and east-facing beaches of the Bahamas during the next couple of days. These swells are likely to cause life-threatening surf and rip current conditions. Tropical-storm-force winds, especially in gusts, are possible in Bermuda through Thursday. Katia is expected to produce total rain accumulations of 1 to 2 inches across Bermuda.

Hurricane Katia (12L) Category One, Strengthening Expected – September 1st, 2011

19.3N 42.6W

September 1st, 2011 Category: Image of the day, Tropical Cyclones

Hurricane Katia (12L) - August 31st, 2011

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Track of TS 12L  - September 1st, 2011 © Univ. of Wisconsin

Track of TS 12L

The center of Hurricane Katia (12L) is located near latitude 15.2 north, longitude 45.9 west. Katia is moving toward the west near 20 mph (32 km/h). A general motion toward the west-northwest and a decrease in forward speed are expected during the next couple of days.

Maximum sustained winds are near 75 mph (120 km/h) with higher gusts. Katia is a category one hurricane on the Saffir-Simpson scale. Some strengthening is forecast during the next 48 hours, and Katia could become a major hurricane by the weekend.

Hurricane force winds extend outward up to 25 miles (35 km) from the center, and tropical storm force winds extend outward up to 125 miles (205 km). Estimated minimum central pressure is 987 mb (29.15 inches).

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.

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.

Tropical Depression Twelve Could Strengthen to Tropical Storm

14.5N 26.9W

August 29th, 2011 Category: Tropical Storms

Tropical Depression Twelve (12L) - August 29th, 2011

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Track of TD 12L  - August 29th, 2011 © Univ. of Wisconsin

Track of TD 12L

At 11:00 AM AST (1500 UTC) the center of Tropical Depression Twelve was located near latitude 9.8 north, longitude 27.5 west. The depression is moving toward the west near 15 mph (24 km/h). A turn to the west-northwest with some increase in forward speed is expected over the next 48 hours.

Maximum sustained winds are near 35 mph (55 km/h) with higher gusts. Some strengthening is forecast during the next couple of days, and the depression could become a tropical storm by tonight. Estimated minimum central pressure is 1008 mb (29.77 inches).

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