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Newark, Calif. - September 13, 2012  Risk Management Solutions (RMS) estimates that U.S. insured losses from Hurricane Issac’s wind and surge impacts on the U.S. Gulf Coast will fall between USD$1−2 billion, excluding rainfall driven flood losses and all National Flood Insurance Program losses. This estimate includes the possibility of a small amount of loss stemming from so-called coverage leakage, i.e., losses caused by surge inadvertently paid out by wind-only policies.

"We've formulated our estimate using a blend of modeling tools, combined with our assessment of key areas of uncertainty and non-modeled losses – excluding flood," said Dr. Christine Ziehmann, director of Model Product Management at RMS. "The width of the range reflects some remaining uncertainties, including the variability and uncertainty around loss at very low wind speeds—mostly tropical storm strength—and, in particular, the uncertainty around coverage leakage of surge related losses into wind-only loss payments."

Hurricane Isaac made landfall in Louisiana on Tuesday, August 28 as a Category 1 strength hurricane, near the mouth of Lake Mississippi, then made a second landfall of the same intensity near Port Fourchon, Louisiana on Wednesday, August 29. The storm then continued to move northwest very slowly across Louisiana, was downgraded to a tropical storm later that day, and finally dissipated on Saturday, September 1, in Missouri.

A wide swath of strong winds, storm surge, and inland flooding were associated with Isaac, most notably across Louisiana and Mississippi, with further wind and rain damage affecting Arkansas. Inland flooding caused by heavy rainfall was one of the major concerns from Isaac due to the storm being large in size and moving extremely slowly. Louisiana in particular was hit hard by rain from Isaac, though Alabama and Missouri also experienced heavy rainfall.

"From a wind-damage perspective, Isaac made landfall in the same area where Katrina and also Gustav made landfall in 2005 and 2008, respectively," Dr. Ziehmann continued. "Both these previous events impacted the building stock and eradicated a large portion of very low-quality roofs and buildings, which could mean that the wind losses fall into the lower end of the modeled range."

The 2012 Atlantic Hurricane Season has seen 14 tropical storms, with 7 strengthening to hurricane status.

  • Only one of these hurricanes has become a major hurricane – Hurricane Michael, which intensified into a Category 3 hurricane on September 6, but only maintained that status for 6 hours.
  • At this point (September 13) in 2012 the season is the second most active season (tied with 1936) since records began in 1851, in terms of the number of named storms. Only 2005 and 2011 had more named storms as of September 13.
  • Eight tropical storms formed in August, making August 2012 the most active August in terms of Atlantic basin tropical storm activity, tied with the 2004 season.
  • As of September 13, we are just over half way through the 2012 season, and on average, are currently in the most active month– September 10 is officially classed as the peak of the hurricane season.
  • Between 1950 and 2011 on average four tropical storms formed in September, with an average of five tropical storms forming in September between 1995 and 2011. (2004 had four tropical storms in September, and 2005 had five tropical storms in September—all of which strengthened to hurricanes.)

"Seasonal forecasts for 2012, issued at the beginning of August called for around 14 tropical storms in the Atlantic in 2012," continued Dr. Ziehmann. "The 2012 season is currently on track to exceed these forecasts, especially if September is typical of the 1995-2011 average."

A weak to moderate El Niño is forecast to develop during September, which has the potential to inhibit tropical storm development. However through the 2004 hurricane season a weak El Niño was prevalent, although there was still an above-average number of tropical storms, hurricanes, and major hurricanes—the season closing with 14 tropical storms, nine hurricanes and six major hurricanes.

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About RMS

Risk Management Solutions, Inc. (RMS) helps insurers, financial markets, corporations, and public agencies evaluate and manage global risk from natural and man-made catastrophes, including hurricanes, earthquakes, floods, climate change, cyber, and pandemics. RMS models underlie the nearly $2 trillion Property & Casualty industry and many insurers, reinsurers, and brokers around the world rely on RMS model science.

RMS helped pioneer the catastrophe risk industry, and continues to lead in innovation by marrying data and advanced model science with leading-edge SaaS technology. Leaders across multiple industries can address the risks of tomorrow with RMS Risk Intelligence™ (RI), our open, unified cloud platform for global risk, enabling them to tap into RMS HD models, rich data layers, intuitive applications, and APIs.

Further supporting the industry's transition to modern risk management, RMS spearheaded the Risk Data Open Standard (RDOS), a new modern open standard data schema designed to be an extensible, flexible, and future-proof asset within modeling/analysis systems.

RMS is a trusted solutions partner enabling effective risk management for better business decision making across risk identification and selection, mitigation, underwriting, and portfolio management.

Visit RMS.com to learn more and follow us on LinkedIn and Twitter.

(C) 2021 Risk Management Solutions, Inc. RMS, the RMS logo, and RMS Risk Intelligence are trademarks of Risk Management Solutions, Inc. All other trademarks are property of their respective owners.

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