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strong winds due to the temperature contrast between the Gulf Stream southeast of Newfoundland and the nearby landmass. Type of Tropical System By Region (1954-2011) 16 14 12 10 Post/Extra Tropical Storm Tropical Storm Category 1 Hurricane Category 2 Hurricane Category 3 Hurricane 8 6 4 2 0 Labrador Western Central Eastern NL Marine Figure 3-14. Tropical System Frequency Based on Region and Intensity Since 1954, a total of 7 hurricanes have made landfall in Newfoundland as a Category 1 storm. The most recent Category 1 Hurricane to hit Newfoundland was Igor in September 2010, which produced upwards of 300 mm of rain to eastern sections of the Island and winds gusting well above 150 km/h. There has only been one Category 2 Hurricane which has made landfall over Newfoundland, since 1954, which was Hurricane Michael as it came ashore on the South Coast in October 2000. No hurricane on record, rated category 3 or higher, has ever come ashore in Newfoundland. However, Hurricane Ella, at Category 3, did track just southeast of the Avalon Peninsula in September 1978. Early in the Atlantic Hurricane Season (typically June and July), most tropical systems originate off the west coast of Africa and are guided towards the Caribbean by a blocking area of high pressure south of Atlantic Canada, called the Bermuda High, a large semi-permanent system. TA1112733 page 62
Since air flow around high pressure systems is clockwise, storms off the coast of Africa generally move in a westward direction towards the Caribbean Sea and the Southeastern United States. Towards late summer and early fall (August and September), the Bermuda High begins to shift to the east, allowing tropical systems to begin moving northward towards Eastern Canada. Because of this shift in the Bermuda High, the most frequent season of tropical storm activity in Newfoundland and Labrador is late August through early October. Tropical storms and hurricanes can still affect the province outside of this time interval, but do so much less frequently. The frequency and intensity of tropical systems affecting Newfoundland and Labrador by month, since 1954, is shown in Figure 3-15. In addition, the frequency of all tropical systems affecting each region of Newfoundland and Labrador by month is presented at Figure 3-16. Figure 3-15. Frequency and Category of Tropical Systems Affecting Newfoundland and Labrador, by Month (1954-2011) TA1112733 page 63
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Atlantic Climate Adaptation Solutio
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GOVERNMENT OF NEWFOUNDLAND AND LABR
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June 13, 2012 AMEC Project #TA11127
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EXECUTIVE SUMMARY The Government of
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Assessing the Need for New or Updat
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SUMMARY The Government of Newfoundl
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Land Use Change A pre-cursor effort
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fresh water from the Arctic south a
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watershed, which appears to already
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RECOMMENDATION SUMMARY Infrastructu
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7. It is recommended that WRMD deve
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TABLE OF CONTENTS PAGE EXECUTIVE SU
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7.3 References for Assess Need for
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LIST OF TABLES Table 2-1. Flood Eve
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LIST OF FIGURES Figure 2-1. Water R
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1. OVERVIEW In the 1980‟s, under
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Floodway Floodway Fringe Climate Ch
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2. Task B - Updated Flood Events In
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Management Framework for Canada def
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The „Types of Events‟ field is
Page 41 and 42: Field Damage Estimate by Community
Page 43 and 44: Arrangements 10 (DFAA) damage estim
Page 45 and 46: Storm # General Location Year Seaso
Page 47 and 48: 2.3.2 Weather Events - Annual Occur
Page 49 and 50: Figure 2-6. Storm Occurrence by Yea
Page 51 and 52: Figure 2-8. Storm Occurrence by Mon
Page 53 and 54: Type of Event (Grouped) % Occurrenc
Page 55 and 56: Figure 2-11. Flood Occurrence by Se
Page 57 and 58: Coastal Flooding Coastal Flooding a
Page 59 and 60: September is associated, presently,
Page 61 and 62: 3. Task C - Assess Existing Flood R
Page 63 and 64: Gaudon‟s Brook / Cold Brook Steph
Page 65 and 66: 3.3.2.1 Community Flood Watersheds
Page 67 and 68: 3.3.2.3 Earth Observation for Susta
Page 69 and 70: Figure 3-3. Graphical model of land
Page 71 and 72: Original EOSD Classes Shadow Water
Page 73 and 74: surrounding areas were also evaluat
Page 75 and 76: Watershed Community Total Area Fore
Page 77 and 78: correct). Of the 90 accuracy assess
Page 79 and 80: Figure 3-6. GCM sectors selected to
Page 81 and 82: Figure 3-7. Percentage change of pr
Page 83 and 84: The results for temperature are sim
Page 85 and 86: Area Labrador West Central East Sum
Page 87 and 88: West sees slightly larger winter in
Page 89 and 90: These increases, though slight, in
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Page 95 and 96: 10 9 8 7 6 Total Number of Tropical
Page 97 and 98: One of the reasons for this increas
Page 99 and 100: Figure 3-19. Frequency of Named Sto
Page 101 and 102: Figure 3-21. Change in Mean Sea Lev
Page 103 and 104: The net long term sea level effect
Page 105 and 106: Southern Oscillation (ENSO). The AM
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Page 113 and 114: Storms weaken rapidly once they mak
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Page 119 and 120: o Because winter temperatures show
Page 121 and 122: Worst Case Scenarios This section
Page 123 and 124: 5. A hurricane making landfall on t
Page 125 and 126: Standards Association 21 recommends
Page 127 and 128: WRMD has defined a preference for h
Page 129 and 130: The hydrographic network was used t
Page 131 and 132: 4.1.8 Flood History Identification
Page 133 and 134: Watershed Slope The slope attribute
Page 135 and 136: such as number of flood events at a
Page 137 and 138: Deer Lake Placentia Codroy Steady B
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Page 141 and 142: 5.2 Methods The methodology used fo
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Reported Event Damages Storm# Locat
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Given the reported damages resultin
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Figure 5-3. Storm tracks for select
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natural constrictions. The number a
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5.5.2 Community Exposure to Physica
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Community Number of Events 2011 Pop
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Community Access Notes Confinement
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Brook and Deer Lake are both locate
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Warning Systems 1. It is recommende
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source of flood vulnerabilities com
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Figure 6-2. Newfoundland Digital El
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communities ( Gillams, Hughes Brook
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Sub-region Precipitation Climate Ch
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Analysis of the socio-economic data
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East-2 Coastal communities line nea
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6.2.2 Potential Strategies Table 6-
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6.3 Mitigation Recommendations Base
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Table 6-5 presents the range of ave
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West-3, West-4, and Central-3 These
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Mitigation Strategy Cost to Impleme
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Sub-region Watershed Characteristic
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TA1112733 page 155
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Music and Caya, 2007 Richter and Ba
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http://www.arcgis.com/home/item.htm
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Rank Community Name LGP# 82 Massey
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Rank Community Name LGP# 252 Little
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Rank Community Name LGP# 423 Thornl
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TA1112733 page 167
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FOX ISLAND RIVER-POINT GALLANTS GEO
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GEORGE'S BROOK-MILTON GOOBIES GRAND
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TA1112733 page 173
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Flood # Storm # General Location St
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11. Appendix D IDF Curves Report TA
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Development of Projected Intensity-
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Storm Duration Development of Proje
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1979 1983 1987 1991 1995 1999 2003
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Mean Annual Total Precipoitation, m
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Storm Duration Storm Duration Devel
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Storm Duration Storm Duration Storm
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Codroy Valley Watershed Topography
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Parson's Pond Watershed Topography
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Rushoon Watershed: Topography Eleva
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Eastern Watersheds, East Topography
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Eastern 54°0'0"Watersheds, West To
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Central Watersheds, 57°0'0"W East
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Central 58°0'0"W and Western Water
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Badger and Rushy 58°0'0"W Pond Wat
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Cox's Cove Watershed: Land Cover 58
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Ferryland Watershed Land Cover 60°
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49°0'0"N Glenwood-Appleton 56°0'0
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Parson's Pond Watershed: Land Cover
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Rushy Pond Watershed: 57°0'0"WLand
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Stephenville Crossing Watershed: La
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Whitbourne and Brigus Watersheds: L
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Eastern Watersheds 2: Land Cover Ha
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Eastern Watersheds, East: Land Cove
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