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Ross Wagenseil for CDMP January 2000

Dominica Probable Storm Effects. 15.75 N. 61.05 W. 61.7 W. 10yr. 25yr. 50yr. 100yr. SELECT. KILOMETERS. MILES. ARC-MINUTES. Wind. 20. CDMP. Wave. 30. 15. Surge. 15.1 N. 20. 10. 10. 10. 5. 0. 0. 0.

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Ross Wagenseil for CDMP January 2000

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  1. Dominica Probable Storm Effects 15.75 N 61.05 W 61.7 W 10yr 25yr 50yr 100yr SELECT KILOMETERS MILES ARC-MINUTES Wind 20 CDMP Wave 30 15 Surge 15.1 N 20 10 10 10 5 0 0 0 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 3.6% at 15.1 degrees North, and stretched 3.9% at 15.75 degrees North. All model results were calculated using great-circle distances based on the WGS84 datum. Points of Interest: 1 Portsmouth 3 1. Portsmouth: Small bay with town Marigot Ross Wagenseil for CDMP January 2000 2. Roseau: Main town on a steep shore facing west. Dominica 3. Marigot: Airport, cove and town facing east. Note: Waves and surges for Points of Interest are reported from the nearest cell offshore. 2 Roseau N • 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 Atlasfor 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.

  2. 15.75 N Ross Wagenseil for CDMP January 2000 61.05 W 61.7 W 10yr 25yr 50yr 100yr SELECT KILOMETERS MILES ARC-MINUTES Wind 20 CDMP Wave 30 15 Surge Wind Speeds 15.1 N 0 1 2 3 4 5 20 Storm Category 10 10 knots 25 50 75 100 125 mph 10 25 50 75 100 150 125 5 kph 50 100 150 200 250 m/s Min 20 60 10 30 40 50 70 0 0 0 Max Winds 10-Year Return Time Dominica 1 3 1. Portsmouth: 31 m/s 2. Roseau: 31 m/s 3. Marigot: 31 m/s 2 N

  3. 15.75 N Ross Wagenseil for CDMP January 2000 61.05 W 61.7 W 10yr 25yr 50yr 100yr SELECT KILOMETERS MILES ARC-MINUTES Wind 20 CDMP WaveHeights Wave 30 15 Surge 15.1 N 20 10 6 4 1 3 5 2 7 Meters 10 5 10 25 Feet 20 15 10 5 Min 0 0 0 Max Waves 10-Year Return Time Dominica 1 3 1. Portsmouth: 3.9 m 2. Roseau: 3.8 to 3.9 m 3. Marigot: 3.9 m 2 N

  4. 15.75 N Ross Wagenseil for CDMP January 2000 61.05 W 61.7 W 10yr 25yr 50yr 100yr SELECT KILOMETERS MILES ARC-MINUTES Wind 20 CDMP Wave 30 Surge Heights 15 Surge 15.1 N 20 10 1 2 3 4 6 5 Meters 10 20 15 10 5 Feet 10 5 Min 0 0 0 Max Surges 10-Year Return Time Dominica 1 3 1. Portsmouth: 0.2 m 2. Roseau: 0.1 m 3. Marigot:` 0.2 m 2 N

  5. 15.75 N Ross Wagenseil for CDMP January 2000 61.05 W 61.7 W 10yr 25yr 50yr 100yr SELECT KILOMETERS MILES ARC-MINUTES Wind 20 CDMP Wave 30 15 Surge Wind Speeds 15.1 N 0 1 2 3 4 5 20 Storm Category 10 10 knots 25 50 75 100 125 mph 10 25 50 75 100 150 125 5 kph 50 100 150 200 250 m/s Min 20 60 10 30 40 50 70 0 0 0 Max Winds 25-Year Return Time Dominica 1 3 1. Portsmouth: 40 m/s 2. Roseau: 39 m/s 3. Marigot: 40 m/s 2 N

  6. 15.75 N Ross Wagenseil for CDMP January 2000 61.05 W 61.7 W 10yr 25yr 50yr 100yr SELECT KILOMETERS MILES ARC-MINUTES Wind 20 CDMP WaveHeights Wave 30 15 Surge 15.1 N 20 10 6 4 1 3 5 2 7 Meters 10 5 10 25 Feet 20 15 10 5 Min 0 0 0 Max Waves 25-Year Return Time Dominica 1 3 1. Portsmouth: 5.0 m 2. Roseau: 4.9 m 3. Marigot: 5.0 m 2 N

  7. 15.75 N Ross Wagenseil for CDMP January 2000 61.05 W 61.7 W 10yr 25yr 50yr 100yr SELECT KILOMETERS MILES ARC-MINUTES Wind 20 CDMP Wave 30 Surge Heights 15 Surge 15.1 N 20 10 1 2 3 4 6 5 Meters 10 20 15 10 5 Feet 10 5 Min 0 0 0 Max Surges 25-Year Return Time Dominica 1 3 1. Portsmouth: 0.3 m 2. Roseau: 0.3 m 3. Marigot: 0.4 m 2 N

  8. 15.75 N Ross Wagenseil for CDMP January 2000 61.05 W 61.7 W 10yr 25yr 50yr 100yr SELECT KILOMETERS MILES ARC-MINUTES Wind 20 CDMP Wave 30 15 Surge Wind Speeds 15.1 N 0 1 2 3 4 5 20 Storm Category 10 10 knots 25 50 75 100 125 mph 10 25 50 75 100 150 125 5 kph 50 100 150 200 250 m/s Min 20 60 10 30 40 50 70 0 0 0 Max Winds 50-Year Return Time Dominica 1 3 1. Portsmouth: 47 m/s 2. Roseau: 45 to 46 m/s 3. Marigot: 46 m/s 2 N

  9. 15.75 N Ross Wagenseil for CDMP January 2000 61.05 W 61.7 W 10yr 25yr 50yr 100yr SELECT KILOMETERS MILES ARC-MINUTES Wind 20 CDMP WaveHeights Wave 30 15 Surge 15.1 N 20 10 6 4 1 3 5 2 7 Meters 10 5 10 25 Feet 20 15 10 5 Min 0 0 0 Max Waves 50-Year Return Time Dominica 1 3 1. Portsmouth: 5.9 m 2. Roseau: 5.6 to 5.7 m 3. Marigot: 5.8 m 2 N

  10. 15.75 N Ross Wagenseil for CDMP January 2000 61.05 W 61.7 W 10yr 25yr 50yr 100yr SELECT KILOMETERS MILES ARC-MINUTES Wind 20 CDMP Wave 30 Surge Heights 15 Surge 15.1 N 20 10 1 2 3 4 6 5 Meters 10 20 15 10 5 Feet 10 5 Min 0 0 0 Max Surges 50-Year Return Time Dominica 1 3 1. Portsmouth: 0.5 m 2. Roseau: 0.4 m 3. Marigot: 0.6 m 2 N

  11. 15.75 N Ross Wagenseil for CDMP January 2000 61.05 W 61.7 W 10yr 25yr 50yr 100yr SELECT KILOMETERS MILES ARC-MINUTES Wind 20 CDMP Wave 30 15 Surge Wind Speeds 15.1 N 0 1 2 3 4 5 20 Storm Category 10 10 knots 25 50 75 100 125 mph 10 25 50 75 100 150 125 5 kph 50 100 150 200 250 m/s Min 20 60 10 30 40 50 70 0 0 0 Max Winds 100-Year Return Time Dominica 1 3 1. Portsmouth: 53 m/s 2. Roseau: 51 to 52 m/s 3. Marigot: 52 m/s 2 N

  12. 15.75 N Ross Wagenseil for CDMP January 2000 61.05 W 61.7 W 10yr 25yr 50yr 100yr SELECT KILOMETERS MILES ARC-MINUTES Wind 20 CDMP WaveHeights Wave 30 15 Surge 15.1 N 20 10 6 4 1 3 5 2 7 Meters 10 5 10 25 Feet 20 15 10 5 Min 0 0 0 Max Waves 100-Year Return Time Dominica 1 3 1. Portsmouth: 6.6 m 2. Roseau: 6.4 to 6.5 m 3. Marigot: 6.6 m 2 N

  13. 15.75 N Ross Wagenseil for CDMP January 2000 61.05 W 61.7 W 10yr 25yr 50yr 100yr SELECT KILOMETERS MILES ARC-MINUTES Wind 20 CDMP Wave 30 Surge Heights 15 Surge 15.1 N 20 10 1 2 3 4 6 5 Meters 10 20 15 10 5 Feet 10 5 Min 0 0 0 Max Surges 100-Year Return Time Dominica 1 3 1. Portsmouth: 0.7 m 2. Roseau: 0.6 m 3. Marigot: 0.8 m 2 N

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