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Ross Wagenseil for CDMP January 2000

Anguilla & Vicinity Probable Storm Effects. 18.4 N. 62.6 W. 63.4 W. Ross Wagenseil for CDMP March 2000. 10yr. 25yr. 50yr. 100yr. SELECT. KILOMETERS. MILES. 17.8 N. ARC-MINUTES. Wind. 20. CDMP. Wave. 30. 15. Surge. 20. 10. 10. 10. 5. 0. 0. 0.

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Ross Wagenseil for CDMP January 2000

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  1. Anguilla& Vicinity Probable Storm Effects 18.4 N 62.6 W 63.4 W Ross Wagenseil for CDMP March 2000 10yr 25yr 50yr 100yr SELECT KILOMETERS MILES 17.8 N ARC-MINUTES Wind 20 CDMP Wave 30 15 Surge 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 5.1% at 17.8 degrees North, and stretched 5.4% at 18.4 degrees North. All model results were calculated using great-circle distances based on the WGS84 datum. Anguilla Ross Wagenseil for CDMP January 2000 Island Harbour Points of Interest: 1 Anguilla 1. Island Harbour is protected by a complicated system of reefs to the north. 2 Little Harbour 2. Little Harbour is near a gap in the fringing reefs on the south shore. St. Martin 3 3. Phillipsburg: Main town and harbour. Phillipsburg N St. Maartin Note: Waves and surges for Points of Interest are reported from the nearest cell offshore. St. Bart. • 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. 18.4 N 62.6 W 63.4 W Ross Wagenseil for CDMP March 2000 10yr 25yr 50yr 100yr SELECT KILOMETERS MILES 17.8 N ARC-MINUTES Wind 20 CDMP Wave 30 15 Surge Wind Speeds 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 Max 20 60 10 30 40 50 70 0 0 0 Winds 10-Year Return Time Anguilla & vicinity 1 2 1. Island Harbour: 32 m/s 2. Little Harbour: 31 m/s 3 3. Phillipsburg: 31 m/s N

  3. 18.4 N 62.6 W 63.4 W Ross Wagenseil for CDMP March 2000 10yr 25yr 50yr 100yr SELECT KILOMETERS MILES 17.8 N ARC-MINUTES Wind 20 CDMP WaveHeights Wave 30 15 Surge 20 10 6 4 1 3 5 2 7 Meters 10 5 10 25 Feet 20 15 10 5 Min Max 0 0 0 Waves 10-Year Return Time Anguilla & vicinity 1 2 1. Island Harbour: 3.9 m high, immediately to the north 2. Little Harbour: 3.4 to 3.9 m high, immediately to the south and east 3 3. Phillipsburg: 3.9 m N

  4. 18.4 N 62.6 W 63.4 W Ross Wagenseil for CDMP March 2000 10yr 25yr 50yr 100yr SELECT KILOMETERS MILES 17.8 N ARC-MINUTES Wind 20 CDMP Wave 30 Surge Heights 15 Surge 20 10 1 2 3 4 6 5 Meters 10 20 15 10 5 Feet 10 5 Min Max 0 0 0 Surges 10-Year Return Time Anguilla & vicinity 1 2 1. Island Harbour: 0.3 m high, immediately offshore to the north 2. Little Harbour: 0.3 m high, offshore to the south and east 3 3. Phillipsburg: 0.2 m N

  5. 18.4 N 62.6 W 63.4 W Ross Wagenseil for CDMP March 2000 10yr 25yr 50yr 100yr SELECT KILOMETERS MILES 17.8 N ARC-MINUTES Wind 20 CDMP Wave 30 15 Surge Wind Speeds 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 Max 20 60 10 30 40 50 70 0 0 0 Winds 25-Year Return Time Anguilla & vicinity 1 2 1. Island Harbour: 41 m/s 2. Little Harbour: 40 m/s 3 3. Phillipsburg: 40 m/s N

  6. 18.4 N 62.6 W 63.4 W Ross Wagenseil for CDMP March 2000 10yr 25yr 50yr 100yr SELECT KILOMETERS MILES 17.8 N ARC-MINUTES Wind 20 CDMP WaveHeights Wave 30 15 Surge 20 10 6 4 1 3 5 2 7 Meters 10 5 10 25 Feet 20 15 10 5 Min Max 0 0 0 Waves 25-Year Return Time Anguilla & vicinity 1 2 1. Island Harbour: 5.1 m high, immediately offshore to the north 2. Little Harbour: 3.6 m to the south, 3.7 m to the east, and 5.0 m immediately offshore to the southeast. 3 3. Phillipsburg: 4.9 m N

  7. 18.4 N 62.6 W 63.4 W Ross Wagenseil for CDMP March 2000 10yr 25yr 50yr 100yr SELECT KILOMETERS MILES 17.8 N ARC-MINUTES Wind 20 CDMP Wave 30 Surge Heights 15 Surge 20 10 1 2 3 4 6 5 Meters 10 20 15 10 5 Feet 10 5 Min Max 0 0 0 Surges 25-Year Return Time Anguilla & vicinity 1 2 1. Island Harbour: 0.6 m immediately offshore to the north 2. Little Harbour: 0.6 m to 0.7 m immediately offshore 3 3. Phillipsburg: 0.5 m N

  8. 18.4 N 62.6 W 63.4 W Ross Wagenseil for CDMP March 2000 10yr 25yr 50yr 100yr SELECT KILOMETERS MILES 17.8 N ARC-MINUTES Wind 20 CDMP Wave 30 15 Surge Wind Speeds 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 Max 20 60 10 30 40 50 70 0 0 0 Winds 50-Year Return Time Anguilla & vicinity 1 2 1. Island Harbour: 47 m/s 2. Little Harbour: 47 m/s 3 3. Phillipsburg: 46 m/s N

  9. 18.4 N 62.6 W 63.4 W Ross Wagenseil for CDMP March 2000 10yr 25yr 50yr 100yr SELECT KILOMETERS MILES 17.8 N ARC-MINUTES Wind 20 CDMP WaveHeights Wave 30 15 Surge 20 10 6 4 1 3 5 2 7 Meters 10 5 10 25 Feet 20 15 10 5 Min Max 0 0 0 Waves 50-Year Return Time Anguilla & vicinity 1 2 1. Island Harbour: 5.9 m high offshore 2. Little Harbour: 3.8 m high near shore, 5.4 m high a little farther out 3 3. Phillipsburg: 5.1 m N

  10. 18.4 N 62.6 W 63.4 W Ross Wagenseil for CDMP March 2000K 10yr 25yr 50yr 100yr SELECT KILOMETERS MILES 17.8 N ARC-MINUTES Wind 20 CDMP Wave 30 Surge Heights 15 Surge 20 10 1 2 3 4 6 5 Meters 10 20 15 10 5 Feet 10 5 Min Max 0 0 0 Surges 50-Year Return Time Anguilla & vicinity 1 2 1. Island Harbour: 0.9 m high immediately offshore 2. Little Harbour: 0.9 m high, immediately offshore 3 3. Phillipsburg: 0.8 m N

  11. 18.4 N 62.6 W 63.4 W Ross Wagenseil for CDMP March 2000 10yr 25yr 50yr 100yr SELECT KILOMETERS MILES 17.8 N ARC-MINUTES Wind 20 CDMP Wave 30 15 Surge Wind Speeds 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 Max 20 60 10 30 40 50 70 0 0 0 Winds 100-Year Return Time Anguilla & vicinity 1 2 1. Island Harbour: 53 m/s 2. Little Harbour: 53 m/s 3 3. Phillipsburg: 53 m/s N

  12. 18.4 N 62.6 W 63.4 W Ross Wagenseil for CDMP March 2000 10yr 25yr 50yr 100yr SELECT KILOMETERS MILES 17.8 N ARC-MINUTES Wind 20 CDMP WaveHeights Wave 30 15 Surge 20 10 6 4 1 3 5 2 7 Meters 10 5 10 25 Feet 20 15 10 5 Min Max 0 0 0 Waves 100-Year Return Time Anguilla & vicinity 1 2 1. Island Harbour: 6.8 m high offshore 2. Little Harbour: 4.1 m at the shore, 5.6 m high a little farther out 3 3. Phillipsburg: 5.3 m N

  13. 18.4 N 62.6 W 63.4 W Ross Wagenseil for CDMP March 2000 10yr 25yr 50yr 100yr SELECT KILOMETERS MILES 17.8 N ARC-MINUTES Wind 20 CDMP Wave 30 Surge Heights 15 Surge 20 10 1 2 3 4 6 5 Meters 10 20 15 10 5 Feet 10 5 Min Max 0 0 0 Surges 100-Year Return Time Anguilla & vicinity 1 2 1. Island Harbour: 1.2 m high at the shore 2. Little Harbour: 1.3 m high at the shore 3 3. Phillipsburg: 1.0 m N

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