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Tropical Depression Isaac (09L) 85 Miles Northeast of Shreveport, Louisiana, USA – August 31st, 2012

32.5N 93.7W

August 31st, 2012 Category: Image of the day, Tropical Storms

Tropical Depression Isaac (09L) – August 30th, 2012

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Track of Tropical Depression Isaac (09L) - August 30th, 201212 © Univ. of Wisconsin

Track of TD 09L

As of 10 p.m. CDT August 30 (0300 UTC August 31),  Tropical Depression Isaac (09L) is located within 20 nautical miles of 33.5°N 93.0°W, about 85 mi (1355 km) northeast of Shreveport, Louisiana; about 95 mi (150 km) south-southwest of Little Rock, Arkansas. Maximum sustained winds are 25 knots (30 mph, 45 km/h), with stronger gusts. Minimum central pressure is 998 mbar (hPa; 29.47 InHg), and the system is moving north at 9 kt (10 mph, 16 km/h).

Tropical Storm Isaac (09L) 15 Miles South of Baton Rouge, Louisiana, USA

30.4N 91.1W

August 30th, 2012 Category: Tropical Storms

Tropical Storm Isaac (09L) – August 29th, 2012

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Track of Tropical Storm Isaac (09L) - August 29th, 2012 © Univ. of Wisconsin

Track of TS 09L

As of 10 p.m. CDT August 29 (0300 UTC August 30), Tropical Storm Isaac (09L)  is located within 20 nautical miles of 30.3°N 91.2°W, about 15 mi (25 km) south of Baton Rouge, and about 70 mi (110 km) west-northwest of New Orleans, Louisiana.

Maximum sustained winds are 50 knots (60 mph, 95 km/h), with stronger gusts. Minimum central pressure is 980 mbar (hPa; 28.94 InHg), and the system is moving northwest at 5 kt (6 mph, 9 km/h). Tropical storm force winds extend outward up to 175 miles (280 km) from the center of Isaac.

Hurricane Isaac (09L) West-Southwest of New Orleans, USA – August 29th, 2012

28.9N 86.2W

August 29th, 2012 Category: Image of the day, Tropical Cyclones

Tropical Storm Isaac (09L) – August 27th, 2012

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Track of Hurricane  Isaac (09L) - August 29th, 2012 © Univ. of Wisconsin

Track of Hurricane Isaac

At about 16:20 UTC on August 28, Isaac attained hurricane status about 75 mi (115 km) south-southeast of the mouth of the Mississippi River, based on data from the Hurricane Hunters.

As of 12 p.m. CDT (1700 UTC) August 29, Hurricane Isaac (09L) is located within 15 nautical miles of 29.7°N 90.8°W, about 10 mi (15 km) northwest of Houma, Louisiana and about 45 mi (75 km) west-southwest of New Orleans, Louisiana.

Maximum sustained winds are 65 knots (75 mph, 120 km/h), with stronger gusts. Minimum central pressure is 973 mbar (hPa; 28.73 InHg), and the system is moving northwest at 5 kt (6 mph, 9 km/h). Hurricane force winds extend up to 45 miles (75 km) from the center of Isaac, and tropical storm force winds up to 175 miles (280 km) from the center.

Tropical Storm Isaac (09L) Near Florida – August 27th, 2012

28.3N 84.8W

August 27th, 2012 Category: Image of the day, Tropical Storms

Tropical Storm Isaac (09L) – August 26th, 2012

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Track of Tropical Storm Isaac (09L) - August 27th, 2012 © Univ. of Wisconsin

Track of Tropical Storm Isaac

The National Hurricane Center began tracking a tropical wave off the coast of Africa on August 17.

It started to become more concentrated on August 18, with further organization beginning later that day as it headed into favorable environmental conditions for development.

The circulation continued to intensify in the next couple of days. After acquiring more deep convection, the National Hurricane Center classified the wave as a tropical depression on August 21 at 5:00 a.m. AST (0900 UTC). It was upgraded to Tropical Storm Isaac at 5:00 p.m. AST (2100 UTC) August 21.

As of 4 p.m. CDT (2100 UTC) August 27, Tropical Storm Isaac (09L) is located within 15 nautical miles of 26.1°N 85.9°W, about 255 mi (410 km) south-southwest of Apalachicola, Florida and about 280 mi (450 km) southeast of the mouth of the Mississippi River.

Maximum sustained winds are 55 knots (65 mph, 100 km/h), with stronger gusts. Minimum central pressure is 984 mbar (hPa; 29.06 InHg), and the system is moving northwest at 12 kt (14 mph, 22 km/h). Tropical storm force winds extend outward up to 205 miles (335 km) from the center of Isaac.

View of Hurricane Irene (09L) Making Landfall Over Eastern USA and Canada – August 31st, 2011

37.7N 77.1W

August 31st, 2011 Category: Image of the day, Tropical Cyclones

Hurricane Irene (09L) - August 27th, 2011

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Hurricane Irene (09L) left extensive flood and wind damage along its path through the Caribbean, the east coast of the USA and as far north as Canada.

These images show the system on August 27, as it was approaching the Outer Banks of North Carolina and had weakened to a Category 1 hurricane. At 7:30 am EDT (11:30 UTC) the same day, Irene made landfall near Cape Lookout, on North Carolina’s Outer Banks, with winds of 85 mph (140 km/h).

After having tracked over land for about 10 hours, the eye of Irene became cloud-filled, although the center remained well-defined on radar images. Later on August 27, Irene re-emerged into the Atlantic near the southern end of the Chesapeake Bay in Virginia.

Shortly before sunrise, at about 09:35 UTC on August 28, Irene made a second landfall at the Little Egg Inlet on the New Jersey shore,[32] and soon after moved over water again. Hours later, Irene weakened to a tropical storm just as it made a third U.S. landfall in the Coney Island area of Brooklyn, in New York City, New York, about 9:00 am EDT (13:00 UTC) on August 28.[citation needed]

Following its August 28 New York landfall, Irene moved northeast over New England, becoming post-tropical over the state of Maine at 11:00 pm EDT (03:00 UTC August 29).  The extratropical cyclone continued northward into eastern Quebec, Canada, then crossed the St. Lawrence River into Labrador before emerging into the Labrador Sea, late on August 29.