Hurricane Isaac 2012: Storm Makes Landfall in Louisiana
Hurricane Isaac was a Category 1 storm that made landfall in Louisana on August 28, , causing tornadoes and widespread flooding in five states. USGS scientists, engineers, and technicians worked along the Gulf coast in response to Hurricane Isaac, deploying and maintaining storm tide sensors and real-time streamgages in anticipation of Isaac's arrival. Aug 28, · Aug. 28, — -- Hurricane Isaac made landfall this evening in southeastern Louisiana, with winds of 80 mph that spread out over an area miles wide. It was a Category 1 hurricane .
The hurricane weakened and later dissipated on September 1 while over Missouri. Before landfall, Governor Bobby Jindal declared a state of emergency to the state, as well as ordering the mandatory evacuation of 60, residents in low-lying areas of Louisiana along the Tangipahoa River in Tangipahoa Parish. Isaac's large wind field contributed to a strong storm surge peaking at The strong waves inundated large areas of how to start a nursing school business state's coastal regions, particularly in Plaquemines Parish.
The hurricane also brought heavy rainfall, leading to severe inland flooding. Rainfall amounts peaked statewide at Isaac's strong winds caused infrastructural and crop damage, in addition to storm surge and heavy rains.
The strong winds also caused a widespread power outagewithelectricity customers losing power. Hurricane Isaac originated from a tropical wave that moved off the western coast of Africa on August Moving generally westward, the low-pressure area initially did not have a well-defined center until three days later. As a result, convection associated with the system organized and intensified, and the tropical wave quickly strengthened into a tropical depression.
Maintaining tropical storm intensity, Isaac later made its first landfall on the southern coast of Haiti early on August 25 as a result of curving around the ridge of high-pressure.
There the storm directly killed 24 people, worsening conditions still remaining after the Haiti earthquake. Isaac later began to curve westwards due to wind patterns which brought it between two opposingly rotating cyclonic systems. The storm paralleled the northern coast of the island prior to making a close pass of Key West, Floridawhere it caused minor flood damage across the Florida Keys and South Florida upon entry into the Gulf of Mexico.
The threat of tropical cyclone impacts in Tampa, Florida forced the postponing of the Republican National Convention. In the gulf, the tropical storm curved to the northwest and attained hurricane strength on August 27 near the southern Louisiana coast. Another ridge of high pressure caused Isaac to move towards the west and slow down as it made two landfalls on the state. Once it moved inland, the hurricane weakened before dissipating over Missouri on September 1.
The National Hurricane Center first began to issue tropical cyclone warnings and watches for areas of Louisiana at UTC on August 26, when a hurricane watch was issued for coastal areas of the state from the Mississippi River Delta eastward. A second, unconnected hurricane watch was issued for coastal areas of New Orleans and Lake Pontchartrain at the same time.
As Isaac moved closer to the coast, both watches were upgraded to hurricane warnings at UTC. Another hurricane warning was issued for Lake Maurepas at the same time. A tropical storm warning and hurricane watch was issued for coastal areas of Louisiana from Intracoastal City to Morgan City at UTC on August 27, with the watch later being upgraded to a warning. All tropical cyclone-related warnings remained in affect for the entire state coast for the duration of Isaac's passage.
After the hurricane degenerated to a tropical storm at UTC on August 29, all hurricane warnings were discontinued. As Isaac moved further inland, active tropical storm warnings progressively began to cover a smaller region of the Louisiana coast before all tropical cyclone warnings were discontinued at UTC on August Upon the issuing of hurricane watches warnings, Louisiana Governor Bobby Jindal declared a state of emergency for the entirety Louisiana,  recommending evacuation of areas unprotected by levees or areas south of the Intracoastal Waterway.
Charles Parish and Terrebonne Parish73, residents were ordered to evacuate. Shortly after the hurricane moved back over the Gulf of Mexico, prior to making a second landfall near Port Fourchon with little change in intensity. Afterwards, Isaac weakened over land, moving to the northwest across the state before exiting Louisiana at the state border with Arkansas.
At the coast, the system's large size generated a strong storm surge that caused extensive damage to low-lying areas of the state. The strong storm surge inundated areas of lower Louisiana. Areas of Plaquemines Parish were estimated to have been submerged under as much as 17 ft 5. In eastern areas of the parish, water had accumulated from Breton Sound against a levee. The rising water levels later overtopped the levee height, causing it to overflow and inundate primarily uninhabited areas between Braithwaite and Belair.
The strong storm surge, in combination with strong winds forced the Mississippi River to flow upstream for nearly a day, rising as much as 10 ft 3. Isaac's storm surged flowed upstream along the Mississippi River as far north as Red River Landinglocated mi km from the river's mouth.
Hurricane Isaac dropped heavy rainfall across the state, particularly in eastern areas of Louisiana,  which caused flash flooding and river flooding. Runoff caused by heavy rainfall at the Tangipahoa River caused it to rise 9 ft 2. Street flooding also occurred in New Orleans. A category 1 hurricane, like Isaac, has sustained winds of at least 74 mph and no more than 95 mph.
Storm surge is the rise in water level caused by the winds forcing the water forward. In many parts of the Gulf Coastit does not take very strong winds to create a potentially dangerous what color star is the sun surge.
Isaac made landfall near the mouth of the Mississippi River with sustained winds of 70kt 81 mph. This was enough to cause flooding in large areas of south Louisiana especially in St.
BernardOrleansPlaqueminesand St. Tammany Parishes where water height was as much as 10 to 12 feet above sea level. Besides for effects on populated areas, Isaac also had a dramatic effect on the wetlands and barrier islands of southern Louisiana which provide large amounts of biodiversity and offer numerous advantages to humans.
The United States Geological Survey conducted multiple aerial surveys of landmasses specifically vulnerable to hurricanes. These surveys were done before and after Hurricane Isaac in order to provide a comparison.
Photos of the Chandeleur Islandsa series of barrier islands off of the eastern coast of southern Louisiana, show significant erosion caused by wind and storm surge. How to make south indian chicken biryani, almost all of the pre-storm vegetation was lost. Today, a common problem associated with wetlands and barrier islands is that once they have been eroded and reclaimed by the Gulf of Mexico, they are likely to permanently remain open water.
The river would carry sediment down its path, and seasonal flooding of the river would allow sediment to be deposited in adjacent areas. Additionally, forming distributaries would let the Mississippi River branch off, reaching new areas, and thus form large amounts of wetlands. This process, known as channelizationhas serious consequences for wetland ecosystems which include drainage of wetlands, degradation of natural habitats, and elimination of natural flow patterns.
The river is not able to deposit sediment in diverse areas to help create wetlands. Instead, the river flows through its artificially determined path and deposits the valuable sediment off the edge of the continental shelf.
Before human channelization of waterways, the river's how to design fashion sketches process of sediment deposition was enough to sustain the wetland habitat, but currently wetland area is on a downward trend.
Sincethe Mississippi River Delta Basin has lost 70 percent of its land area. At this rate, it is predicted that less than 5 percent of the original land area from will exist in Additionally, levees and waterway barriers can trap storm surge and prevent proper draining. For example, after Hurricane Rita inthe enclosed marshes of Chenier plain were flooded for over nine months following the storm.
Research done by Gregory D. Steyer in the months following Hurricane Rita later published in revealed that the Chenier plain that remained flooded had little vegetation recovery because of trapped saline water. However, in the eastern delta plain where the primary form of damage was wind and storm surge with little flooding, the vegetation recovered much quicker.
The HSDRRS is a project aimed at completely re-engineering the levee system in New Orleans and surrounding areas in order to withstand effects from a " year storm," or a storm that has a one percent chance of occurring each year. Although Isaac was only a category 1 storm, the speed of Isaac's movement was considerably slower than most hurricanes, allowing more time for storm surge and damage to compile.
Isaac produced tropical storm force winds for up to 45 hours  while the effects of storms like Katrina and Rita only lasted for 21 and 16 hours, respectively. From Wikipedia, the free encyclopedia.
Main article: Hurricane Isaac Tropical cyclones portal. January 28, Tropical Cyclone Report. National Hurricane Center. Retrieved 14 February The Two-Way. National Public Radio. Retrieved 15 February August 26, Miami, Florida: Cable News Network. Huffington Post. Storm Data. Asheville, North Carolina. Tropical Cyclone Point Maxima. Retrieved 16 February By Robbie Berg. Rep, Feb. Louisiana State Government, n. Duane E. Variable effects of hurricanes on the coast and adjacent marshes: a problem for land managers.
In: Brodtmann, N. Satellite images and aerial photographs of the effects of Hurricanes Katrina and Rita on coastal Louisiana. Geological Survey Data Series New Orleans, June, Hurricane Isaac. Florida Louisiana Tornado outbreak. Category Portal WikiProject Commons.
A strong deep-layer subtropical ridge over the western Atlantic caused Isaac to move quickly westward at 15 to 20 kt for the next two days. The center of the tropical storm movedFile Size: 2MB. Sep 01, · Summary Body. Describes inspections to conduct and reports to prepare to address known and potential damages to OCS facilities including platforms, subsea production safety systems, and pipelines caused by Hurricane Isaac before striking land on Aug. 29,
Science Explorer. Multimedia Gallery. Park Passes. Technical Announcements. Employees in the News. Emergency Management. Survey Manual. Hurricane Isaac was a Category 1 storm that made landfall in Louisana on August 28, , causing tornadoes and widespread flooding in five states. USGS scientists, engineers, and technicians worked along the Gulf coast in response to Hurricane Isaac, deploying and maintaining storm tide sensors and real-time streamgages in anticipation of Isaac's arrival.
The USGS, in concert with our partners, is providing scientific assessments of the challenges wrought by Isaac. Storm Surge Sensors are also shown that record fine-resolution storm tide and wave level data. This data became available on the viewer as soon as it was safe to retrieve the sensors and upload the data. In addition, imagery was provided from the National Geodetic Survey.
Following the event, high-water mark HWM data was added to the map by field crews soon after collection, including survey data and photos. The USGS provides practical, unbiased information about the Nation's rivers and streams that is crucial in mitigating hazards associated with floods. This site provides information about the USGS activities, data, and services provided during regional high-flow events, such as hurricanes or multi-state flooding events.
Hurricane Isaac coastal change forecast, pre- and post-storm photos, and lidar elevation maps document coastal change. Gale- to storm-force winds associated with the passage of Sandy across central New Jersey and eastern Pennsylvania that lasted 12 to 18 hours caused major to record coastal flooding in southeastern New York on October 29, The U.
Geological Survey USGS deployed a temporary monitoring network of water-level and barometric pressure sensors at locations along the gulf coast from Alabama to Louisiana to record the timing, areal extent, and magnitude of hurricane storm tide and coastal flooding generated by Hurricane Isaac. This deployment was undertaken as part During large, short-term events, the USGS collects streamflow and additional data including storm tide, wave height, high-water marks, and additional sensor deployments to aid in documenting flood events.
SWaTH is a system of flood-hardened, real-time telemetered tide gages, rapid deployment gages, and storm tide sensors deployed in integrated network configurations along the Northeastern Atlantic Coast from North Carolina to Maine. A new technology is being deployed by U.
Geological Survey scientists this weekend to map urban flooding caused by Hurricane Isaac. Media are invited to join U. Geological Survey crews working in areas impacted by Isaac as they retrieve storm-tide sensors deployed prior to the storm, measure high-water marks, make inland flood measurements, and collect water samples to measure water quality following the storm.
Strong winds and storm surge from Hurricane Isaac's landfall forced the Mississippi River to flow backwards for nearly 24 hours on Tuesday, August The USGS streamgage at Belle Chasse, Louisiana, showed the Mississippi River flowing upstream at , cubic feet per second, surging to 10 feet above than its previous height.
Average flow for the Mississippi River at Belle Chase is abou. Hurricane response crews from the U. Geological Survey are installing more than storm-tide sensors at key locations along the Gulf Coast from the Florida Panhandle to Louisiana in advance of the arrival of Hurricane Isaac.
Sandy beaches and barrier islands along the northern Gulf of Mexico are highly vulnerable to beach and dune erosion as Hurricane Isaac makes landfall this week, according to a new U. Geological Survey assessment. The projections also show which coastal areas may see storm-surge topping sand dunes and beaches. Geological Survey on Friday.
These numbers are likely to increase if the storm reaches hurricane strength as predicted. Skip to main content. Search Search. Water Resources. Hurricane Isaac. Flooded homes. Possibilities of coastal erosion. Cemetery damage. Date published: February 28, Attribution: Water Resources , Floods and Droughts. Filter Total Items: 2. Year Select Year Apply Filter.
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