Examining hurricane-sandy-storm-surge-2012

RiskMeter Lessons from RiskMeter Lessons from Hurricane SandyHurricane Sandy

©Copyright 2012, CDS Business Mapping, LLC. All Rights Reserved.

AgendaAgenda

Overview of Surge ModelingOverview of Surge Modeling Difference Between Flood and Surge Difference Between Flood and Surge

MapsMaps Sizing the ProblemSizing the Problem Examples from SandyExamples from Sandy

IntroductionIntroduction

Insurance companies, particularly commercial Insurance companies, particularly commercial insurers, are concerned with coastal floodinginsurers, are concerned with coastal flooding

Hurricane Sandy caused significant losses from Hurricane Sandy caused significant losses from surgesurge

Hurricane Sandy was more of a flood event than Hurricane Sandy was more of a flood event than a wind eventa wind event

Recent court rulings have held insurers liable for Recent court rulings have held insurers liable for hurricane flooding even if not technically hurricane flooding even if not technically coveredcovered

About CDS Storm Surge ModelAbout CDS Storm Surge Model

Model is based upon two different sourcesModel is based upon two different sources SLOSH ModelSLOSH Model

Most well known storm surge modelMost well known storm surge model Elevation DataElevation Data

Using 30m digital elevation modelsUsing 30m digital elevation models

What is SLOSH Data?What is SLOSH Data?

Slosh predicts storm surge levels based Slosh predicts storm surge levels based upon different hurricane categoriesupon different hurricane categories

The data we use predicts storm surge The data we use predicts storm surge heights at high tideheights at high tide

worst case scenarioworst case scenario

The heights shown are the surge heights The heights shown are the surge heights above sea-level, not above the groundabove sea-level, not above the ground

Texas SLOSH BasinsTexas SLOSH Basins

Overlapping basins

Slosh Basins-Long IslandSlosh Basins-Long Island

7.7,11.7,15.5,18.67.7,11.7,15.5,18.67.7,11.7,15.5,18.67.7,11.7,15.5,18.67.7,11.7,15.5,18.67.7,11.7,15.5,18.67.7,11.7,15.5,18.67.7,11.7,15.5,18.67.7,11.7,15.5,18.6

8,12.4,16.5,19.88,12.4,16.5,19.88,12.4,16.5,19.88,12.4,16.5,19.88,12.4,16.5,19.88,12.4,16.5,19.88,12.4,16.5,19.88,12.4,16.5,19.88,12.4,16.5,19.8

8.3,13,17.3,20.28.3,13,17.3,20.28.3,13,17.3,20.28.3,13,17.3,20.28.3,13,17.3,20.28.3,13,17.3,20.28.3,13,17.3,20.28.3,13,17.3,20.28.3,13,17.3,20.2

3.3,7.3,13.5,17.63.3,7.3,13.5,17.63.3,7.3,13.5,17.63.3,7.3,13.5,17.63.3,7.3,13.5,17.63.3,7.3,13.5,17.63.3,7.3,13.5,17.63.3,7.3,13.5,17.63.3,7.3,13.5,17.6

3.5,7.4,13.6,18.13.5,7.4,13.6,18.13.5,7.4,13.6,18.13.5,7.4,13.6,18.13.5,7.4,13.6,18.13.5,7.4,13.6,18.13.5,7.4,13.6,18.13.5,7.4,13.6,18.13.5,7.4,13.6,18.1

99.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.9

99.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.9

99.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.9

99.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.9

99.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.9

8.4,12.1,15.9,19.68.4,12.1,15.9,19.68.4,12.1,15.9,19.68.4,12.1,15.9,19.68.4,12.1,15.9,19.68.4,12.1,15.9,19.68.4,12.1,15.9,19.68.4,12.1,15.9,19.68.4,12.1,15.9,19.6

8.4,12.1,16,19.78.4,12.1,16,19.78.4,12.1,16,19.78.4,12.1,16,19.78.4,12.1,16,19.78.4,12.1,16,19.78.4,12.1,16,19.78.4,12.1,16,19.78.4,12.1,16,19.7

8.4,12.1,16,19.88.4,12.1,16,19.88.4,12.1,16,19.88.4,12.1,16,19.88.4,12.1,16,19.88.4,12.1,16,19.88.4,12.1,16,19.88.4,12.1,16,19.88.4,12.1,16,19.8

8.4,12.1,15.9,19.68.4,12.1,15.9,19.68.4,12.1,15.9,19.68.4,12.1,15.9,19.68.4,12.1,15.9,19.68.4,12.1,15.9,19.68.4,12.1,15.9,19.68.4,12.1,15.9,19.68.4,12.1,15.9,19.6

8.4,12.2,16.1,208.4,12.2,16.1,208.4,12.2,16.1,208.4,12.2,16.1,208.4,12.2,16.1,208.4,12.2,16.1,208.4,12.2,16.1,208.4,12.2,16.1,208.4,12.2,16.1,20

99.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.9

7.2,11,14.5,17.57.2,11,14.5,17.57.2,11,14.5,17.57.2,11,14.5,17.57.2,11,14.5,17.57.2,11,14.5,17.57.2,11,14.5,17.57.2,11,14.5,17.57.2,11,14.5,17.5

7.6,11.7,15.5,18.47.6,11.7,15.5,18.47.6,11.7,15.5,18.47.6,11.7,15.5,18.47.6,11.7,15.5,18.47.6,11.7,15.5,18.47.6,11.7,15.5,18.47.6,11.7,15.5,18.47.6,11.7,15.5,18.4

7.8,12.2,16.1,19.37.8,12.2,16.1,19.37.8,12.2,16.1,19.37.8,12.2,16.1,19.37.8,12.2,16.1,19.37.8,12.2,16.1,19.37.8,12.2,16.1,19.37.8,12.2,16.1,19.37.8,12.2,16.1,19.3

6.8,11.1,15.2,20.16.8,11.1,15.2,20.16.8,11.1,15.2,20.16.8,11.1,15.2,20.16.8,11.1,15.2,20.16.8,11.1,15.2,20.16.8,11.1,15.2,20.16.8,11.1,15.2,20.16.8,11.1,15.2,20.1

7,11,15.1,20.57,11,15.1,20.57,11,15.1,20.57,11,15.1,20.57,11,15.1,20.57,11,15.1,20.57,11,15.1,20.57,11,15.1,20.57,11,15.1,20.5

99.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.9

8.1,11.6,15.3,18.88.1,11.6,15.3,18.88.1,11.6,15.3,18.88.1,11.6,15.3,18.88.1,11.6,15.3,18.88.1,11.6,15.3,18.88.1,11.6,15.3,18.88.1,11.6,15.3,18.88.1,11.6,15.3,18.8

8.2,11.7,15.5,19.18.2,11.7,15.5,19.18.2,11.7,15.5,19.18.2,11.7,15.5,19.18.2,11.7,15.5,19.18.2,11.7,15.5,19.18.2,11.7,15.5,19.18.2,11.7,15.5,19.18.2,11.7,15.5,19.1

99.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.9

99.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.9

99.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.9

7.9,11.4,15,18.57.9,11.4,15,18.57.9,11.4,15,18.57.9,11.4,15,18.57.9,11.4,15,18.57.9,11.4,15,18.57.9,11.4,15,18.57.9,11.4,15,18.57.9,11.4,15,18.5

8,11.4,15.1,18.68,11.4,15.1,18.68,11.4,15.1,18.68,11.4,15.1,18.68,11.4,15.1,18.68,11.4,15.1,18.68,11.4,15.1,18.68,11.4,15.1,18.68,11.4,15.1,18.6

7.8,11.2,14.8,18.37.8,11.2,14.8,18.37.8,11.2,14.8,18.37.8,11.2,14.8,18.37.8,11.2,14.8,18.37.8,11.2,14.8,18.37.8,11.2,14.8,18.37.8,11.2,14.8,18.37.8,11.2,14.8,18.3

7.9,11.3,15,18.67.9,11.3,15,18.67.9,11.3,15,18.67.9,11.3,15,18.67.9,11.3,15,18.67.9,11.3,15,18.67.9,11.3,15,18.67.9,11.3,15,18.67.9,11.3,15,18.6

7.9,11.5,15.4,18.97.9,11.5,15.4,18.97.9,11.5,15.4,18.97.9,11.5,15.4,18.97.9,11.5,15.4,18.97.9,11.5,15.4,18.97.9,11.5,15.4,18.97.9,11.5,15.4,18.97.9,11.5,15.4,18.9

6.3,9.5,12.6,15.56.3,9.5,12.6,15.56.3,9.5,12.6,15.56.3,9.5,12.6,15.56.3,9.5,12.6,15.56.3,9.5,12.6,15.56.3,9.5,12.6,15.56.3,9.5,12.6,15.56.3,9.5,12.6,15.5

6.6,10.1,13.3,16.16.6,10.1,13.3,16.16.6,10.1,13.3,16.16.6,10.1,13.3,16.16.6,10.1,13.3,16.16.6,10.1,13.3,16.16.6,10.1,13.3,16.16.6,10.1,13.3,16.16.6,10.1,13.3,16.1

7,10.9,14.2,17.57,10.9,14.2,17.57,10.9,14.2,17.57,10.9,14.2,17.57,10.9,14.2,17.57,10.9,14.2,17.57,10.9,14.2,17.57,10.9,14.2,17.57,10.9,14.2,17.5

7.3,11.6,15.1,197.3,11.6,15.1,197.3,11.6,15.1,197.3,11.6,15.1,197.3,11.6,15.1,197.3,11.6,15.1,197.3,11.6,15.1,197.3,11.6,15.1,197.3,11.6,15.1,19

99.9,12,15.5,19.799.9,12,15.5,19.799.9,12,15.5,19.799.9,12,15.5,19.799.9,12,15.5,19.799.9,12,15.5,19.799.9,12,15.5,19.799.9,12,15.5,19.799.9,12,15.5,19.7

99.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.9

7.6,11,14.5,17.97.6,11,14.5,17.97.6,11,14.5,17.97.6,11,14.5,17.97.6,11,14.5,17.97.6,11,14.5,17.97.6,11,14.5,17.97.6,11,14.5,17.97.6,11,14.5,17.9

7.6,10.9,14.5,17.97.6,10.9,14.5,17.97.6,10.9,14.5,17.97.6,10.9,14.5,17.97.6,10.9,14.5,17.97.6,10.9,14.5,17.97.6,10.9,14.5,17.97.6,10.9,14.5,17.97.6,10.9,14.5,17.9

7.6,10.9,14.5,17.87.6,10.9,14.5,17.87.6,10.9,14.5,17.87.6,10.9,14.5,17.87.6,10.9,14.5,17.87.6,10.9,14.5,17.87.6,10.9,14.5,17.87.6,10.9,14.5,17.87.6,10.9,14.5,17.8

99.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.9

5.6,8.7,12.3,15.95.6,8.7,12.3,15.95.6,8.7,12.3,15.95.6,8.7,12.3,15.95.6,8.7,12.3,15.95.6,8.7,12.3,15.95.6,8.7,12.3,15.95.6,8.7,12.3,15.95.6,8.7,12.3,15.9

7.3,10.6,14,17.37.3,10.6,14,17.37.3,10.6,14,17.37.3,10.6,14,17.37.3,10.6,14,17.37.3,10.6,14,17.37.3,10.6,14,17.37.3,10.6,14,17.37.3,10.6,14,17.3

99.9,99.9,99.9,16.699.9,99.9,99.9,16.699.9,99.9,99.9,16.699.9,99.9,99.9,16.699.9,99.9,99.9,16.699.9,99.9,99.9,16.699.9,99.9,99.9,16.699.9,99.9,99.9,16.699.9,99.9,99.9,16.6

6.4,9.8,13,15.96.4,9.8,13,15.96.4,9.8,13,15.96.4,9.8,13,15.96.4,9.8,13,15.96.4,9.8,13,15.96.4,9.8,13,15.96.4,9.8,13,15.96.4,9.8,13,15.9

99.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.9

7,10.1,13.5,16.67,10.1,13.5,16.67,10.1,13.5,16.67,10.1,13.5,16.67,10.1,13.5,16.67,10.1,13.5,16.67,10.1,13.5,16.67,10.1,13.5,16.67,10.1,13.5,16.6

6.9,10,13.3,16.46.9,10,13.3,16.46.9,10,13.3,16.46.9,10,13.3,16.46.9,10,13.3,16.46.9,10,13.3,16.46.9,10,13.3,16.46.9,10,13.3,16.46.9,10,13.3,16.4

7.1,10.3,13.8,17.27.1,10.3,13.8,17.27.1,10.3,13.8,17.27.1,10.3,13.8,17.27.1,10.3,13.8,17.27.1,10.3,13.8,17.27.1,10.3,13.8,17.27.1,10.3,13.8,17.27.1,10.3,13.8,17.2

99.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.9

5.5,8.5,11.4,14.15.5,8.5,11.4,14.15.5,8.5,11.4,14.15.5,8.5,11.4,14.15.5,8.5,11.4,14.15.5,8.5,11.4,14.15.5,8.5,11.4,14.15.5,8.5,11.4,14.15.5,8.5,11.4,14.1

5.8,8.8,11.8,14.75.8,8.8,11.8,14.75.8,8.8,11.8,14.75.8,8.8,11.8,14.75.8,8.8,11.8,14.75.8,8.8,11.8,14.75.8,8.8,11.8,14.75.8,8.8,11.8,14.75.8,8.8,11.8,14.7

6.6,10.1,13.5,16.66.6,10.1,13.5,16.66.6,10.1,13.5,16.66.6,10.1,13.5,16.66.6,10.1,13.5,16.66.6,10.1,13.5,16.66.6,10.1,13.5,16.66.6,10.1,13.5,16.66.6,10.1,13.5,16.6

6.9,10.9,14.7,186.9,10.9,14.7,186.9,10.9,14.7,186.9,10.9,14.7,186.9,10.9,14.7,186.9,10.9,14.7,186.9,10.9,14.7,186.9,10.9,14.7,186.9,10.9,14.7,18

5.4,8.3,11.5,14.75.4,8.3,11.5,14.75.4,8.3,11.5,14.75.4,8.3,11.5,14.75.4,8.3,11.5,14.75.4,8.3,11.5,14.75.4,8.3,11.5,14.75.4,8.3,11.5,14.75.4,8.3,11.5,14.7

6.6,9.5,12.5,15.76.6,9.5,12.5,15.76.6,9.5,12.5,15.76.6,9.5,12.5,15.76.6,9.5,12.5,15.76.6,9.5,12.5,15.76.6,9.5,12.5,15.76.6,9.5,12.5,15.76.6,9.5,12.5,15.7

5.9,8.9,11.9,14.75.9,8.9,11.9,14.75.9,8.9,11.9,14.75.9,8.9,11.9,14.75.9,8.9,11.9,14.75.9,8.9,11.9,14.75.9,8.9,11.9,14.75.9,8.9,11.9,14.75.9,8.9,11.9,14.7

7,11.1,15.1,18.87,11.1,15.1,18.87,11.1,15.1,18.87,11.1,15.1,18.87,11.1,15.1,18.87,11.1,15.1,18.87,11.1,15.1,18.87,11.1,15.1,18.87,11.1,15.1,18.8

99.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.9

6,9.1,12.4,15.96,9.1,12.4,15.96,9.1,12.4,15.96,9.1,12.4,15.96,9.1,12.4,15.96,9.1,12.4,15.96,9.1,12.4,15.96,9.1,12.4,15.96,9.1,12.4,15.9

6.1,9.4,12.8,16.36.1,9.4,12.8,16.36.1,9.4,12.8,16.36.1,9.4,12.8,16.36.1,9.4,12.8,16.36.1,9.4,12.8,16.36.1,9.4,12.8,16.36.1,9.4,12.8,16.36.1,9.4,12.8,16.3

6.3,9,11.8,156.3,9,11.8,156.3,9,11.8,156.3,9,11.8,156.3,9,11.8,156.3,9,11.8,156.3,9,11.8,156.3,9,11.8,156.3,9,11.8,15

99.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.9

5.4,8.2,11.1,13.75.4,8.2,11.1,13.75.4,8.2,11.1,13.75.4,8.2,11.1,13.75.4,8.2,11.1,13.75.4,8.2,11.1,13.75.4,8.2,11.1,13.75.4,8.2,11.1,13.75.4,8.2,11.1,13.7

6.1,9.1,12.3,15.16.1,9.1,12.3,15.16.1,9.1,12.3,15.16.1,9.1,12.3,15.16.1,9.1,12.3,15.16.1,9.1,12.3,15.16.1,9.1,12.3,15.16.1,9.1,12.3,15.16.1,9.1,12.3,15.1

6.5,10,13.4,16.76.5,10,13.4,16.76.5,10,13.4,16.76.5,10,13.4,16.76.5,10,13.4,16.76.5,10,13.4,16.76.5,10,13.4,16.76.5,10,13.4,16.76.5,10,13.4,16.7

6.4,9.9,13.5,17.26.4,9.9,13.5,17.26.4,9.9,13.5,17.26.4,9.9,13.5,17.26.4,9.9,13.5,17.26.4,9.9,13.5,17.26.4,9.9,13.5,17.26.4,9.9,13.5,17.26.4,9.9,13.5,17.2

6.1,9,12,15.16.1,9,12,15.16.1,9,12,15.16.1,9,12,15.16.1,9,12,15.16.1,9,12,15.16.1,9,12,15.16.1,9,12,15.16.1,9,12,15.1

5.4,8.3,11.2,13.85.4,8.3,11.2,13.85.4,8.3,11.2,13.85.4,8.3,11.2,13.85.4,8.3,11.2,13.85.4,8.3,11.2,13.85.4,8.3,11.2,13.85.4,8.3,11.2,13.85.4,8.3,11.2,13.8

6.6,10.3,14,17.36.6,10.3,14,17.36.6,10.3,14,17.36.6,10.3,14,17.36.6,10.3,14,17.36.6,10.3,14,17.36.6,10.3,14,17.36.6,10.3,14,17.36.6,10.3,14,17.3

6.4,9.8,13.1,16.56.4,9.8,13.1,16.56.4,9.8,13.1,16.56.4,9.8,13.1,16.56.4,9.8,13.1,16.56.4,9.8,13.1,16.56.4,9.8,13.1,16.56.4,9.8,13.1,16.56.4,9.8,13.1,16.5

6.5,9.8,13.2,16.66.5,9.8,13.2,16.66.5,9.8,13.2,16.66.5,9.8,13.2,16.66.5,9.8,13.2,16.66.5,9.8,13.2,16.66.5,9.8,13.2,16.66.5,9.8,13.2,16.66.5,9.8,13.2,16.6

6.2,9.3,12.4,15.56.2,9.3,12.4,15.56.2,9.3,12.4,15.56.2,9.3,12.4,15.56.2,9.3,12.4,15.56.2,9.3,12.4,15.56.2,9.3,12.4,15.56.2,9.3,12.4,15.56.2,9.3,12.4,15.5

5.1,7.6,10.2,12.65.1,7.6,10.2,12.65.1,7.6,10.2,12.65.1,7.6,10.2,12.65.1,7.6,10.2,12.65.1,7.6,10.2,12.65.1,7.6,10.2,12.65.1,7.6,10.2,12.65.1,7.6,10.2,12.6

5.5,8.3,11.1,13.95.5,8.3,11.1,13.95.5,8.3,11.1,13.95.5,8.3,11.1,13.95.5,8.3,11.1,13.95.5,8.3,11.1,13.95.5,8.3,11.1,13.95.5,8.3,11.1,13.95.5,8.3,11.1,13.9

5.9,9,12,14.95.9,9,12,14.95.9,9,12,14.95.9,9,12,14.95.9,9,12,14.95.9,9,12,14.95.9,9,12,14.95.9,9,12,14.95.9,9,12,14.9

6.8,10.6,14.4,17.86.8,10.6,14.4,17.86.8,10.6,14.4,17.86.8,10.6,14.4,17.86.8,10.6,14.4,17.86.8,10.6,14.4,17.86.8,10.6,14.4,17.86.8,10.6,14.4,17.86.8,10.6,14.4,17.8

6.5,9.9,13.2,16.46.5,9.9,13.2,16.46.5,9.9,13.2,16.46.5,9.9,13.2,16.46.5,9.9,13.2,16.46.5,9.9,13.2,16.46.5,9.9,13.2,16.46.5,9.9,13.2,16.46.5,9.9,13.2,16.4

6.5,9.8,13.2,16.56.5,9.8,13.2,16.56.5,9.8,13.2,16.56.5,9.8,13.2,16.56.5,9.8,13.2,16.56.5,9.8,13.2,16.56.5,9.8,13.2,16.56.5,9.8,13.2,16.56.5,9.8,13.2,16.5

5.1,7.6,10.2,12.65.1,7.6,10.2,12.65.1,7.6,10.2,12.65.1,7.6,10.2,12.65.1,7.6,10.2,12.65.1,7.6,10.2,12.65.1,7.6,10.2,12.65.1,7.6,10.2,12.65.1,7.6,10.2,12.6

6.1,9.3,12.5,15.46.1,9.3,12.5,15.46.1,9.3,12.5,15.46.1,9.3,12.5,15.46.1,9.3,12.5,15.46.1,9.3,12.5,15.46.1,9.3,12.5,15.46.1,9.3,12.5,15.46.1,9.3,12.5,15.4

6.3,9.3,12.3,15.56.3,9.3,12.3,15.56.3,9.3,12.3,15.56.3,9.3,12.3,15.56.3,9.3,12.3,15.56.3,9.3,12.3,15.56.3,9.3,12.3,15.56.3,9.3,12.3,15.56.3,9.3,12.3,15.5

6.5,9.7,12.9,16.16.5,9.7,12.9,16.16.5,9.7,12.9,16.16.5,9.7,12.9,16.16.5,9.7,12.9,16.16.5,9.7,12.9,16.16.5,9.7,12.9,16.16.5,9.7,12.9,16.16.5,9.7,12.9,16.1

6.5,9.8,13.2,16.56.5,9.8,13.2,16.56.5,9.8,13.2,16.56.5,9.8,13.2,16.56.5,9.8,13.2,16.56.5,9.8,13.2,16.56.5,9.8,13.2,16.56.5,9.8,13.2,16.56.5,9.8,13.2,16.5

4.8,7,9.2,11.54.8,7,9.2,11.54.8,7,9.2,11.54.8,7,9.2,11.54.8,7,9.2,11.54.8,7,9.2,11.54.8,7,9.2,11.54.8,7,9.2,11.54.8,7,9.2,11.5

5.1,7.6,10.1,12.65.1,7.6,10.1,12.65.1,7.6,10.1,12.65.1,7.6,10.1,12.65.1,7.6,10.1,12.65.1,7.6,10.1,12.65.1,7.6,10.1,12.65.1,7.6,10.1,12.65.1,7.6,10.1,12.6

5.3,7.9,10.6,13.25.3,7.9,10.6,13.25.3,7.9,10.6,13.25.3,7.9,10.6,13.25.3,7.9,10.6,13.25.3,7.9,10.6,13.25.3,7.9,10.6,13.25.3,7.9,10.6,13.25.3,7.9,10.6,13.2

6,9.2,12.3,15.36,9.2,12.3,15.36,9.2,12.3,15.36,9.2,12.3,15.36,9.2,12.3,15.36,9.2,12.3,15.36,9.2,12.3,15.36,9.2,12.3,15.36,9.2,12.3,15.3

99.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.999.9,99.9,99.9,99.9

4.7,6.9,9.2,11.54.7,6.9,9.2,11.54.7,6.9,9.2,11.54.7,6.9,9.2,11.54.7,6.9,9.2,11.54.7,6.9,9.2,11.54.7,6.9,9.2,11.54.7,6.9,9.2,11.54.7,6.9,9.2,11.5

5.3,7.8,10.4,12.95.3,7.8,10.4,12.95.3,7.8,10.4,12.95.3,7.8,10.4,12.95.3,7.8,10.4,12.95.3,7.8,10.4,12.95.3,7.8,10.4,12.95.3,7.8,10.4,12.95.3,7.8,10.4,12.9

6.2,9.2,12.2,15.16.2,9.2,12.2,15.16.2,9.2,12.2,15.16.2,9.2,12.2,15.16.2,9.2,12.2,15.16.2,9.2,12.2,15.16.2,9.2,12.2,15.16.2,9.2,12.2,15.16.2,9.2,12.2,15.1

6.8,10.2,13.6,16.96.8,10.2,13.6,16.96.8,10.2,13.6,16.96.8,10.2,13.6,16.96.8,10.2,13.6,16.96.8,10.2,13.6,16.96.8,10.2,13.6,16.96.8,10.2,13.6,16.96.8,10.2,13.6,16.9

7,10.8,14.3,17.97,10.8,14.3,17.97,10.8,14.3,17.97,10.8,14.3,17.97,10.8,14.3,17.97,10.8,14.3,17.97,10.8,14.3,17.97,10.8,14.3,17.97,10.8,14.3,17.9

7.3,11.2,15.1,18.87.3,11.2,15.1,18.87.3,11.2,15.1,18.87.3,11.2,15.1,18.87.3,11.2,15.1,18.87.3,11.2,15.1,18.87.3,11.2,15.1,18.87.3,11.2,15.1,18.87.3,11.2,15.1,18.8

Storm SurgeCategory 4 Heights

99.9 to 99.9 (3520)24.5 to 99.9 (725)18.6 to 24.5 (761)12.3 to 18.6 (979)4.7 to 12.3 (1313)

The label show The label show surge heights for surge heights for Cat 1, 2, 3, 4Cat 1, 2, 3, 4

The gray cells The gray cells have no surge have no surge valuesvalues

There are cells There are cells which clearly which clearly would experience would experience storm surge, that storm surge, that have no valueshave no values

Eastern end of Long Island, NY

Surge ContoursSurge Contours

•The problem isn’t as simple as it seemsThe problem isn’t as simple as it seems

•In this illustration, you can see that a location may be inlaIn this illustration, you can see that a location may be inland, but protected by a hill;nd, but protected by a hill; but if the water is high enough, it may go over the hill (or levee but if the water is high enough, it may go over the hill (or levee – think Katrina)– think Katrina)

•Just because SLOSH says the water is above the elevation of the loJust because SLOSH says the water is above the elevation of the location, this doescation, this does NOT mean that the property would be inundated; topology mattersNOT mean that the property would be inundated; topology matters

Surge Contours – Long IslandSurge Contours – Long Island

By Storm Category

Storm Surge

3

4

2

1

0Eastern end of Long Island, NY

What we’ve developedWhat we’ve developed

We’ve combined the storm surge contours and We’ve combined the storm surge contours and SLOSH dataSLOSH data

We’ve filled in the missing SLOSH cellsWe’ve filled in the missing SLOSH cells We give you the highest values from multiple We give you the highest values from multiple

basins (users do not have to select a basin)basins (users do not have to select a basin) If you combine this with the RiskMeter If you combine this with the RiskMeter

slope/aspect/elevation report, you can estimate slope/aspect/elevation report, you can estimate the water depth at any location!the water depth at any location!

This gives the most complete picture of storm This gives the most complete picture of storm surge effects in an area available today, from surge effects in an area available today, from anyoneanyone

Fields ReturnedFields Returned

Minimum Hurricane CategoryMinimum Hurricane Category Surge Risk ScoreSurge Risk Score Surge Height Category 1Surge Height Category 1 Surge Height Category 2Surge Height Category 2 Surge Height Category 3Surge Height Category 3 Surge Height Category 4Surge Height Category 4 Surge Height Category 5Surge Height Category 5 NotesNotes

How Big is the Problem?How Big is the Problem?NY/Long Island ExampleNY/Long Island Example

How Big is the Problem?How Big is the Problem?

New York/Long IslandNew York/Long Island

Population living in a 100 year flood zone: 2,482,038Population living in a storm surge area: 4,746,434Population living in a storm surge area and not recognized as a 100 year flood zone: 2,936,639

Population based upon storm category:Population based upon storm category:

Category 1: 238,355Category 2: 524,434Category 3: 962,823Category 4: 1,211,027

How Big is the Problem?How Big is the Problem?

As you can see, in TX, storm surge extends tens of miles inland!

Brooklyn/Bronx Brooklyn/Bronx Flood ZonesFlood Zones

Pink – 100 year flood zones

Brooklyn/Bronx Brooklyn/Bronx Flood Zones with Surge ModelFlood Zones with Surge Model

Pink – 100 year flood zones; dark blue Cat 1 surge; light blue cat 2

Brooklyn/Bronx Brooklyn/Bronx Flood Zones with Surge Model Flood Zones with Surge Model

and Actual Floodingand Actual Flooding

Pink – 100 year flood zones; dark blue Cat 1 surge; light blue cat 2Red – Actual Flooding

Actual Flooding Actual Flooding vs. Modelvs. Model

Dark blue Cat 1 surge; Light blue cat 2; Red – Actual Flooding

Dark blue Cat 1 surge; Light blue cat 2

Staten Island- ActualStaten Island- Actual


Staten Island- Actual Staten Island- Actual with Surge Modelwith Surge Model


Southern Manhattan – Southern Manhattan – ActualActual

Red – Actual Flooding

Southern Manhattan – ActualSouthern Manhattan – ActualWith Surge ModelWith Surge Model


Tip of Manhattan - ActualTip of Manhattan - Actual


Tip of Manhattan – ActualTip of Manhattan – ActualWith Surge ModelWith Surge Model


Brooklyn/Bronx - ActualBrooklyn/Bronx - Actual


Brooklyn/Bronx – ActualBrooklyn/Bronx – ActualWith Surge ModelWith Surge Model


Coming ImprovementsComing Improvements

New SLOSH DataNew SLOSH Data• ACE has recently released new dataACE has recently released new data

New Elevation DataNew Elevation Data• Updated USGS elevation dataUpdated USGS elevation data

ConclusionsConclusions

Checking flood maps is not a viable risk Checking flood maps is not a viable risk mitigation strategy along the coastmitigation strategy along the coast

Surge maps must be usedSurge maps must be used The RiskMeter Surge Report was very The RiskMeter Surge Report was very

accurate at predicting Sandy’s effectsaccurate at predicting Sandy’s effects Customers saved millions of dollars by Customers saved millions of dollars by

referencing these mapsreferencing these maps

Contact InformationContact Information

If you have any questions, please contact:If you have any questions, please contact:

Dan Munson Dan Munson

Vice President of Sales & MarketingVice President of Sales & Marketing

617-737-4444 617-737-4444

[email protected]@cdsys.com

Examining hurricane-sandy-storm-surge-2012

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