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Post-tropical Cyclone Sandy (18L) Slams East Coast, USA – October 31st, 2012

40.4N 79.9W

October 31st, 2012 Category: Image of the day, Tropical Cyclones

Hurricane Sandy (18L) – October 30th, 2012

As of 11 a.m. EDT (01500 UTC) October 30, Post-tropical Cyclone Sandy (18L) is located near 40.5°N 77.0°W, about 120 miles (190 km) ESE of Pittsburgh, Pennsylvania and about 145 miles (233 km) west of Philadelphia, Pennsylvania. Maximum sustained winds are 45 mph (72 km/h), with stronger gusts. Minimum central pressure is 983 mbar (hPa; 29.00 inHg), and the system is moving west at 10 mph (16 km/h).

Hurricane Sandy was the largest Atlantic hurricane in diameter on record, with its winds stretching about 1,100 miles from end to end. About 8 million customers have no electricity spread over 18 states from Maine to Virginia as of midday October 30. About half were in New York and New Jersey. More than 13,000 flights were canceled across the U.S. on October 29, and more than 3,500 were called off October 30. Sandy crippled 25% of wireless cell towers and a quarter of cable services in 10 states. Storm damage was projected at $30 billion to $50 billion, meaning it could prove to be one of the costliest natural disasters in U.S. history. As of October 30, 39 deaths have been reported in the U.S.

Hurricane Sandy (18L) Impacts USA from Virginia to New England – October 30th, 2012

40.2N 75.5W

October 30th, 2012 Category: Image of the day, Tropical Cyclones

Hurricane Sandy (18L) – October 29th, 2012

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Track of Hurricane Sandy (18L) - October 29th, 2012 © Univ. of Wisconsin

Track of TS 18L

As of 11 p.m. EDT October 29 (0300 UTC October 30), Post-tropical Cyclone Sandy (18L) is located within 30 nautical miles of 39.8°N 75.4°W, about 10 mi (15 km) SW of Philadelphia, Pennsylvania.

Maximum sustained winds are 65 knots (75 mph, 120 km/h), with stronger gusts. Minimum central pressure is 952 mbar (hPa; 28.11 InHg), and the system is moving northwest at 16 kt (18 mph, 30 km/h).

Just before 8 a.m. on October 29, Sandy turned to the north-northwest and started to make its expected approach towards the U.S. coast, still maintaining Category 1 strength. Although the National Hurricane Center has not officially confirmed the location, at 5:46 PM local time, Accuweather announced it had come ashore in between Avalon and Sea Isle City in Cape May County, New Jersey. NOAA announced officially that the storm had come ashore at approximately 8:00 p.m. EDT 5 miles southwest of Atlantic City, NJ.

On October 29, 2012, at 7:00 p.m. EDT, Sandy was declared a post-tropical cyclone. Sandy’s impact on the United States stretched from Virginia to New England with tropical storm force winds stretching far inland and significant mountain snows in West Virginia. The cyclone brought a record-breaking storm surge to New York City on the evening of October 29, with numerous streets and tunnels flooded in Lower Manhattan and other areas of the city.

Ophelia (16L) Becomes Post-tropical Cyclone

49.1N 51.7W

October 3rd, 2011 Category: Tropical Storms

Post-tropical Cyclone Ophelia (16L) - October 3rd, 2011

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Track of Post-tropical Cyclone Ophelia (16L) - October 3rd, 2011 © Univ. of Wisconsin

Track of TS 16L

At 2:00 PM AST (1800 UTC) the center of Hurricane Ophelia (16L) At 11:00 AM AST (1500 UTC) the center of post-tropical cyclone Ophelia was located near latitude 48.1 north, longitude 52.0 west.

The cyclone is moving toward the east-northeast near 37 mph (59 km/h). This motion is expected to continue until dissipation in a day or so.

Maximum sustained winds are near 60 mph (95 km/h) with higher gusts. Weakening is forecast during the next 24 to 36 hours, and the cyclone is forecast to be absorbed by a cold front on Tuesday. Tropical storm force winds extend outward up to 290 miles (465 km) primarily east through south of the center. Estimated minimum central pressure is 996 mb (29.41 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.

Igor (11L) Becomes Post-Tropical, but Newfoundland Still at Risk from High Winds – September 22nd, 2010

49.3N 60.2W

September 22nd, 2010 Category: Image of the day, Tropical Cyclones

Hurricane Igor (11L) - September 21st, 2010

Convection Associated with 11L

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Track of TS 11L - September 21st, 2010 © Univ. of Wisconsin

Track of TS 11L

At 5:00 PM AST (21:00 UTC) the center of post-tropical cyclone Igor (11L) was located near latitude 49.3 north, longitude 51.7 west. The main image shows some convection on the western side of the storm over Canada.

Igor is moving toward the north-northeast near 39 mph (63 km/hr). A turn toward the north with a decrease in forward speed is expected by Wednesday, followed by a turn toward the northwest by Thursday.

Maximum sustained winds are near 80 mph (130 km/hr) with higher gusts. Little change in strength is expected during the next 24 hours, but the cyclone should begin to gradually weaken by late Wednesday.

Hurricane force winds extend outward up to 85 miles (140 km) from the center, and tropical storm force winds extend outward up to 520 miles (835 km). Estimated minimum central pressure is 950 mb (28.05 inches).

Hurricane Igor resulted in minor damage throughout Bermuda and significant damage in Newfoundland. Current hazards affecting land include wind, rainfall and high surf. Winds of tropical storm force and very near hurricane force, especially in gusts, are occurring in parts of Newfoundland. These winds will likely diminish Tuesday night as Igor moves farther to the north.

The significant rainfall threat over Newfoundland associated with Igor has come to an end. Rainfall will be tapering off this evening as the system moves rapidly north-northeastward.

Large swells along the east coast of the United States will be subsiding tonight. Swells will be slow to subside in Nova Scotia, Newfoundland, Puerto Rico, the Virgin Islands, Hispaniola and portions of the Bahamas during the next couple of days. These swells are likely to cause life-threatening surf and rip currents.

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