Grenada Probable Storm Effects Points of Interest 1

Grenada Probable Storm Effects Points of Interest: 1. Grenville: Town on low ground with barrier reef, 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 2. 2% at 11. 8 degrees North, and stretched 2. 4% at 12. 45 degrees North. All model results were calculated using great-circle distances based on the WGS 84 datum. Ronde Island 2. St. George’s: Main town with harbour. Note: Waves and surges for Points of Interest are reported from the nearest cell offshore. 62. 0 W Ross Wagenseil for CDMP January 2000 1 Grenville Grenada St. George’s 15 25 yr 50 yr 2 3 MILES KILOMETERS ARC-MINUTES Pt. Salines 20 30 N 11. 8 N 100 yr 10 61. 35 W 3. Pt. Salines: Southwest peninsula, with airport. Wave and surge readings are for 1 cell to the west. CT LE 10 yr SE Wind Carriacou 12. 45 N 20 Wave 10 Surge 5 10 0 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.

12. 45 N Winds 10 -Year Return Time Grenada 1. Grenville: 21 m/s 2. St. George’s: 21 m/s 62. 0 W 3. Pt. Salines: 20 m/s 61. 35 W Ross Wagenseil for CDMP January 2000 1 2 15 CT LE 10 yr SE Wind 25 yr 50 yr 20 MILES KILOMETERS ARC-MINUTES 3 30 N CDMP 11. 8 N 100 yr 10 20 Wave 10 Surge 5 knots mph 10 25 0 0 m/s 1 50 25 kph 0 0 Storm Category Wind Speeds 50 50 75 100 20 10 Min 2 75 30 Max 100 4 150 200 50 5 125 150 40 3 250 60 70

12. 45 N Waves 10 -Year Return Time Grenada 1. Grenville: 2. 6 m 2. St. George’s: 2. 6 m 62. 0 W 3. Pt. Salines: 2. 6 m 61. 35 W Ross Wagenseil for CDMP January 2000 1 2 15 CT LE 10 yr SE Wind 25 yr 50 yr 20 MILES KILOMETERS ARC-MINUTES 3 30 N CDMP 11. 8 N 100 yr 10 20 Wave Heights 10 Surge 5 10 Meters 1 Feet 0 0 0 2 5 3 10 Min Max 4 5 15 6 20 7 25

12. 45 N Surges 10 -Year Return Time Grenada 1. Grenville: 0. 1 m 2. St. George’s: 0. 0 m 62. 0 W 3. Pt. Salines: 0. 0 m 61. 35 W Ross Wagenseil for CDMP January 2000 1 2 15 CT LE 10 yr SE Wind 25 yr 50 yr 20 MILES KILOMETERS ARC-MINUTES 3 30 N CDMP 11. 8 N 100 yr 10 20 Wave Surge Heights 10 Surge 5 10 0 0 Meters 1 Feet 0 Min Max 2 5 3 10 4 5 15 6 20

12. 45 N Winds 25 -Year Return Time Grenada 1. Grenville: 28 m/s 2. St. George’s: 28 m/s 62. 0 W 3. Pt. Salines: 28 m/s 61. 35 W Ross Wagenseil for CDMP January 2000 1 2 15 CT LE 10 yr SE Wind 25 yr 50 yr 20 MILES KILOMETERS ARC-MINUTES 3 30 N CDMP 11. 8 N 100 yr 10 20 Wave 10 Surge 5 knots mph 10 25 0 0 m/s 75 100 20 100 40 Max 3 4 150 200 50 5 125 150 30 Min 2 75 50 50 10 1 50 25 kph 0 0 Storm Category Wind Speeds 250 60 70

12. 45 N Waves 25 -Year Return Time Grenada 1. Grenville: 3. 5 m 2. St. George’s: 3. 5 m 62. 0 W 3. Pt. Salines: 3. 5 m 61. 35 W Ross Wagenseil for CDMP January 2000 1 2 15 CT LE 10 yr SE Wind 25 yr 50 yr 20 MILES KILOMETERS ARC-MINUTES 3 30 N CDMP 11. 8 N 100 yr 10 20 Wave Heights 10 Surge 5 10 Meters 1 Feet 0 0 0 2 5 4 3 10 Min 5 15 Max 6 20 7 25

12. 45 N Surges 25 -Year Return Time Grenada 1. Grenville: 0. 2 m 2. St. George’s: 0. 1 m 62. 0 W 3. Pt. Salines: 0. 1 m 61. 35 W Ross Wagenseil for CDMP January 2000 1 2 15 CT LE 10 yr SE Wind 25 yr 50 yr 20 MILES KILOMETERS ARC-MINUTES 3 30 N CDMP 11. 8 N 100 yr 10 20 Wave Surge Heights 10 Surge 5 10 0 0 Meters 1 Feet 0 Min Max 2 5 3 10 4 5 15 6 20

12. 45 N Winds 50 -Year Return Time Grenada 1. Grenville: 33 m/s 2. St. George’s: 32 m/s 62. 0 W 3. Pt. Salines: 33 m/s 61. 35 W Ross Wagenseil for CDMP January 2000 1 2 15 CT LE 10 yr SE Wind 25 yr 50 yr 20 MILES KILOMETERS ARC-MINUTES 3 30 N CDMP 11. 8 N 100 yr 10 20 Wave 10 Surge 5 knots mph 10 25 0 0 m/s 2 75 50 50 10 1 50 25 kph 0 0 Storm Category Wind Speeds 75 100 20 30 Min 100 5 150 200 50 Max 4 125 150 40 3 250 60 70

12. 45 N Waves 50 -Year Return Time Grenada 1. Grenville: 4. 2 m 2. St. George’s: 4. 1 m 62. 0 W 3. Pt. Salines: 4. 1 m 61. 35 W Ross Wagenseil for CDMP January 2000 1 2 15 CT LE 10 yr SE Wind 25 yr 50 yr 20 MILES KILOMETERS ARC-MINUTES 3 30 N CDMP 11. 8 N 100 yr 10 20 Wave Heights 10 Surge 5 10 Meters 1 Feet 0 0 0 2 5 3 4 10 5 15 Min Max 6 20 7 25

12. 45 N Surges 50 -Year Return Time Grenada 1. Grenville: 0. 3 m 2. St. George’s: 0. 2 m 62. 0 W 3. Pt. Salines: 0. 2 m 61. 35 W Ross Wagenseil for CDMP January 2000 1 2 15 CT LE 10 yr SE Wind 25 yr 50 yr 20 MILES KILOMETERS ARC-MINUTES 3 30 N CDMP 11. 8 N 100 yr 10 20 Wave Surge Heights 10 Surge 5 10 0 0 Meters 1 Feet 0 Min Max 2 5 3 10 4 5 15 6 20

12. 45 N Winds 100 -Year Return Time Grenada 1. Grenville: 38 m/s 2. St. George’s: 37 m/s 62. 0 W 3. Pt. Salines: 37 m/s 61. 35 W Ross Wagenseil for CDMP January 2000 1 2 15 CT LE 10 yr SE Wind 25 yr 50 yr 20 MILES KILOMETERS ARC-MINUTES 3 30 N CDMP 11. 8 N 100 yr 10 20 Wave 10 Surge 5 knots mph 10 25 0 0 m/s 75 100 20 2 75 50 50 10 1 50 25 kph 0 0 Storm Category Wind Speeds 100 Min 40 4 150 200 50 Max 5 125 150 30 3 250 60 70

12. 45 N Waves 100 -Year Return Time Grenada 1. Grenville: 4. 7 m 2. St. George’s: 4. 7 m 62. 0 W 3. Pt. Salines: 4. 6 m 61. 35 W Ross Wagenseil for CDMP January 2000 1 2 15 CT LE 10 yr SE Wind 25 yr 50 yr 20 MILES KILOMETERS ARC-MINUTES 3 30 N CDMP 11. 8 N 100 yr 10 20 Wave Heights 10 Surge 5 10 Meters 1 Feet 0 0 0 2 5 3 10 4 5 15 Min Max 6 20 7 25

12. 45 N Surges 100 -Year Return Time Grenada 1. Grenville: 0. 4 m 2. St. George’s: 0. 3 m 62. 0 W 3. Pt. Salines: 0. 3 m 61. 35 W Ross Wagenseil for CDMP January 2000 1 2 15 CT LE 10 yr SE Wind 25 yr 50 yr 20 MILES KILOMETERS ARC-MINUTES 3 30 N CDMP 11. 8 N 100 yr 10 20 Wave Surge Heights 10 Surge 5 10 0 0 Meters 1 Feet 0 Min. Max 2 5 3 10 4 5 15 6 20