St Christopher Nevis The projection of the illustrations

St. Christopher & Nevis The projection of the illustrations is Plate Carrée, a square grid of latitude and longitude. Resolution is 30 arc-seconds. North-South distances are true to scale. East-West distances are stretched 4. 6% at 17. 0 degrees North, and stretched 4. 9% at 17. 6 degrees North. All model results were calculated using great-circle distances based on the WGS 84 datum. 17. 6 N St. Eustatius Probable Storm Effects Points of Interest: 1. Basseterre: Main town on a steep shore facing south. 63. 1 W Note: Waves and surges for Points of Interest are reported from the nearest cell offshore. 62. 4 W Ross St. Wagenseil for CDMP Christopher January 2000 2. Charlestown: Main town on a steep shore facing west. 1 Basseterre 15 CT LE 10 yr SE Wind 25 yr 50 yr 10 30 20 10 Surge 0 10 0 2 0 Nevis Charlestown 17. 00 N 20 Wave 5 MILES KILOMETERS ARC-MINUTES N CDMP This set of maps is part of Section 2 of the Atlas of Probable Storm Effects in the Caribbean Sea , which was sponsored by the Caribbean Disaster Mitigation Project (CDMP), a joint effort of the Organization of American States (OAS) and the US Agency for International Development (USAID). These maps are a result of new techniques for modeling storms and estimating the probabilities of storms, developed in part under the patronage of CDMP. Refer to the Atlas for explanatory materials. WINDS represent sustained 1 -minute winds at 10 m above the surface, and include both surface friction and topographic effects at a resolution of 30 arc-seconds. Friction factors derive from a Level I land-cover classification, with water, forest and open land predominating. If using wind damage models or building codes which internally include surface friction or topographic corrections, the nearest open-water wind speed from one of these maps may be used as input. Careful judgement is advised in reading and applying the values. • SURGES include astronomical tide and setups from pressure, wind and wave, but not wave runup. Surges over land are shown as elevation above sea level, not water depth. • WAVES are the heights of wave crests above the storm surge level in open water. Shoreline effects do not appear at this resolution.

17. 6 N Winds 10 -Year Return Time St. Christopher & Nevis 1. Basseterre: 33 m/s 62. 4 W Ross Wagenseil for CDMP January 2000 2. Charlestown: 33 m/s 63. 1 W 1 15 CT LE 10 yr SE Wind 25 yr 50 yr 10 30 20 MILES KILOMETERS ARC-MINUTES N 2 10 Wave 0 Storm Category Surge 5 10 knots mph 25 0 0 m/s 1 75 100 20 2 75 50 50 10 Wind Speeds 50 25 kph 0 CDMP 17. 00 N 20 100 Min 40 5 150 200 50 Max 4 125 150 30 3 250 60 70

17. 6 N Waves 10 -Year Return Time St. Christopher & Nevis 1. Basseterre: 4. 1 m 62. 4 W Ross Wagenseil for CDMP January 2000 2. Charlestown: 4. 1 m 63. 1 W 1 15 CT LE 10 yr SE Wind 25 yr 50 yr 10 30 20 MILES KILOMETERS ARC-MINUTES N 2 CDMP 17. 00 N 20 Wave Heights 10 Wave Surge 5 10 Meters 1 Feet 0 0 0 2 5 3 10 4 5 15 Min Max 6 20 7 25

17. 6 N Surges 10 -Year Return Time St. Christopher & Nevis 1. Basseterre: 0. 2 m 62. 4 W Ross Wagenseil for CDMP January 2000 2. Charlestown: 0. 2 m 63. 1 W 1 15 CT LE 10 yr SE Wind 25 yr 50 yr 10 30 20 MILES KILOMETERS ARC-MINUTES N 2 CDMP 17. 00 N 20 Surge Heights 10 Wave Surge 5 0 10 Meters 1 0 0 Feet Min Max 2 5 3 10 4 5 15 6 20

17. 6 N Winds 25 -Year Return Time St. Christopher & Nevis 1. Basseterre: 42 m/s 62. 4 W Ross Wagenseil for CDMP January 2000 2. Charlestown: 43 m/s 63. 1 W 1 15 CT LE 10 yr SE Wind 25 yr 50 yr 10 30 20 MILES KILOMETERS ARC-MINUTES N 2 10 Wave 0 Storm Category Surge 5 10 knots mph 25 0 0 m/s 1 75 100 20 2 75 50 50 10 Wind Speeds 50 25 kph 0 CDMP 17. 00 N 20 30 100 Min 4 150 200 250 60 50 Max 5 125 150 40 3 70

17. 6 N Waves 25 -Year Return Time St. Christopher & Nevis 1. Basseterre: 5. 2 m 62. 4 W Ross Wagenseil for CDMP January 2000 2. Charlestown: 5. 4 m 63. 1 W 1 15 CT LE 10 yr SE Wind 25 yr 50 yr 10 30 20 MILES KILOMETERS ARC-MINUTES N 2 CDMP 17. 00 N 20 Wave Heights 10 Wave Surge 5 10 Meters 1 Feet 0 0 0 2 5 3 4 10 6 5 20 15 Min Max 7 25

17. 6 N Surges 25 -Year Return Time St. Christopher & Nevis 1. Basseterre: 0. 4 m 62. 4 W Ross Wagenseil for CDMP January 2000 2. Charlestown: 0. 4 m 63. 1 W 1 15 CT LE 10 yr SE Wind 25 yr 50 yr 10 30 20 MILES KILOMETERS ARC-MINUTES N 2 CDMP 17. 00 N 20 Surge Heights 10 Wave Surge 5 0 10 Meters 1 0 0 Feet Min Max 2 5 3 10 4 5 15 6 20

17. 6 N Winds 50 -Year Return Time St. Christopher & Nevis 1. Basseterre: 49 m/s 62. 4 W Ross Wagenseil for CDMP January 2000 2. Charlestown: 49 m/s 63. 1 W 1 15 CT LE 10 yr SE Wind 25 yr 50 yr 10 30 20 MILES KILOMETERS ARC-MINUTES N 2 10 Wave 0 Storm Category Surge 5 10 knots mph 25 0 0 m/s 1 75 100 20 2 75 50 50 10 Wind Speeds 50 25 kph 0 CDMP 17. 00 N 20 30 100 3 4 150 125 150 200 40 50 Min 5 125 250 60 70 Max

17. 6 N Waves 50 -Year Return Time St. Christopher & Nevis 1. Basseterre: 6. 1 m 62. 4 W Ross Wagenseil for CDMP January 2000 2. Charlestown: 6. 2 m 63. 1 W 1 15 CT LE 10 yr SE Wind 25 yr 50 yr 10 30 20 MILES KILOMETERS ARC-MINUTES N 2 CDMP 17. 00 N 20 Wave Heights 10 Wave Surge 5 10 Meters 1 Feet 0 0 0 2 5 3 4 5 10 15 Min 6 7 25 20 Max

17. 6 N Surges 50 -Year Return Time St. Christopher & Nevis 1. Basseterre: 0. 7 m 62. 4 W Ross Wagenseil for CDMP January 2000 2. Charlestown: 0. 6 m 63. 1 W 1 15 CT LE 10 yr SE Wind 25 yr 50 yr 10 30 20 MILES KILOMETERS ARC-MINUTES N 2 CDMP 17. 00 N 20 Surge Heights 10 Wave Surge 5 0 10 Meters 1 0 0 5 Feet Min 2 Max 3 10 4 5 15 6 20

17. 6 N Winds 100 -Year Return Time St. Christopher & Nevis 1. Basseterre: 55 m/s 62. 4 W Ross Wagenseil for CDMP January 2000 2. Charlestown: 56 m/s 63. 1 W 1 15 CT LE 10 yr SE Wind 25 yr 50 yr 10 30 20 MILES KILOMETERS ARC-MINUTES N 2 10 Wave 0 Storm Category Surge 5 10 knots mph 25 0 0 m/s 1 75 100 20 2 75 50 50 10 Wind Speeds 50 25 kph 0 CDMP 17. 00 N 20 30 100 3 100 250 60 50 Min 5 150 125 150 40 4 125 70 Max

17. 6 N Waves 100 -Year Return Time St. Christopher & Nevis 1. Basseterre: 6. 8 m 62. 4 W Ross Wagenseil for CDMP January 2000 2. Charlestown: 7. 0 m 63. 1 W 1 15 CT LE 10 yr SE Wind 25 yr 50 yr 10 30 20 MILES KILOMETERS ARC-MINUTES N 2 CDMP 17. 00 N 20 Wave Heights 10 Wave Surge 5 10 Meters 1 Feet 0 0 0 2 5 3 10 4 5 15 Min 6 20 7 25 Max

17. 6 N Surges 100 -Year Return Time St. Christopher & Nevis 1. Basseterre: 0. 9 m 62. 4 W Ross Wagenseil for CDMP January 2000 2. Charlestown: 0. 8 m 63. 1 W 1 15 CT LE 10 yr SE Wind 25 yr 50 yr 10 30 20 MILES KILOMETERS ARC-MINUTES N 2 CDMP 17. 00 N 20 Surge Heights 10 Wave Surge 5 0 10 Meters 1 0 0 2 5 Feet Min Max 3 10 4 5 15 6 20