Hurricane Bill was a large Atlantic hurricane that brought minor damage across mainly Atlantic Canada and the East Coast of the United States during August 2009. The second named storm, first hurricane, and first major hurricane of the 2009 Atlantic hurricane season, Bill originated from a tropical wave in the eastern Atlantic on August 15. Initially a tropical depression, the cyclone intensified within a favorable atmospheric environment, becoming Tropical Storm Bill six hours after formation. Steered west-northwest around the southern periphery of a subtropical ridge to the northeast of the cyclone, Bill passed through the central Atlantic. At 0600 UTC on August 17, the cyclone strengthened into a Category 1 hurricane on the Saffir–Simpson hurricane wind scale; within 36 hours, Bill entered a period of rapid deepening and intensified into a major hurricane with winds of 115 mph (185 km/h). Passing well northeast of the Lesser Antilles, Bill attained its peak intensity with maximum sustained winds of 130 mph (215 km/h) and a minimum barometric pressure of 943 mb (hPa; 27.85 inHg) on August 19 and August 20, respectively. Thereafter, an approaching trough induced higher vertical wind shear across the region, causing slow weakening of the hurricane; this same trough resulted in an accelerated motion and curve northward. As the storm passed Bermuda, it contained sustained winds equal to a Category 2, and ultimately struck Newfoundland as a tropical storm. After moving inland and weakening to a tropical storm, Bill began an extratropical transition; this alteration in structure was completed by 1200 UTC on August 24. Two days later, Bill's remnant low was absorbed into a larger extratropical system over the Northern Atlantic.

Hurricane Bill
Bill near peak intensity on August 19
Meteorological history
FormedAugust 15, 2009 (August 15, 2009)
ExtratropicalAugust 24, 2009
DissipatedAugust 26, 2009 (August 26, 2009)
Category 4 major hurricane
1-minute sustained (SSHWS/NWS)
Highest winds130 mph (215 km/h)
Lowest pressure943 mbar (hPa); 27.85 inHg
Overall effects
Fatalities2 direct
Damage$46.2 million (2009 USD)
Areas affectedNortheastern Caribbean, Northeastern United States, Bermuda, Eastern Canada, British Isles
IBTrACSEdit this at Wikidata

Part of the 2009 Atlantic hurricane season

Bill caused $46.2 million in damages and two deaths over a nine-day period. As it passed close to Bermuda, the hurricane caused power outages and strong winds, though damage was minor. Despite remaining well offshore of the United States East Coast, the storm's large wind field contributed to strong surf which caused severe beach erosion. Numerous offshore rescue operations occurred as a result of people swept away by the strong waves. Both deaths caused by the hurricane were the result of drownings off the U.S. coast. In some areas of New England, the storm's outer rainbands caused flash flooding. In Atlantic Canada, Bill caused mainly power outages and flooding events. Several roads were flooded in Nova Scotia, and 32,000 people lost power. In Newfoundland, where the hurricane made landfall, strong winds caused minor tree damage. As an extratropical system, Bill dropped light rainfall in the British Isles and Scandinavia.

Meteorological history

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Map plotting the storm's track and intensity, according to the Saffir–Simpson scale
Map key
  Tropical depression (≤38 mph, ≤62 km/h)
  Tropical storm (39–73 mph, 63–118 km/h)
  Category 1 (74–95 mph, 119–153 km/h)
  Category 2 (96–110 mph, 154–177 km/h)
  Category 3 (111–129 mph, 178–208 km/h)
  Category 4 (130–156 mph, 209–251 km/h)
  Category 5 (≥157 mph, ≥252 km/h)
  Unknown
Storm type
  Extratropical cyclone, remnant low, tropical disturbance, or monsoon depression

A tropical wave moved off the western coast of Africa on August 12, 2009, and entered the Atlantic Ocean. The National Hurricane Center (NHC) remarked upon the possibility for tropical cyclone development, as the wave had already been accompanied by a broad area of shower and thunderstorm activity.[1] The wave quickly organized, and a low pressure system formed to the south of the Cape Verde Islands on August 13.[2] The convection became slightly less organized on August 14,[3] though by early August 15, the NHC reported that a tropical depression was forming.[4] The system was declared Tropical Depression Three later that day.[5]

The newly designated depression continued to intensify, and it was quickly upgraded to Tropical Storm Bill.[6] Numerous rainbands had begun to develop, though the storm lacked deep convection near its center. At this time, Bill was already predicted to become a hurricane.[7] By early on August 16, the storm had developed what NHC forecasters described as a "beautiful" cloud pattern, and environmental conditions favored continued strengthening.[8] Bill intensified to attain Category 1 hurricane status on the Saffir-Simpson Hurricane Scale early on August 17.[9]

By late August 17, satellite imagery indicated that an eye feature may have been developing.[10] Bill sustained deep convection and well-established upper-level outflow;[11] it was upgraded to Category 2 status shortly before undergoing an eyewall replacement cycle.[12] Early August 18, the storm had established a very symmetric and well-organized appearance on satellite imagery, and a large, pronounced eye. The storm was moving west-northwestward under the steering currents of a subtropical ridge to the north.[13] Information derived from Hurricane Hunter reports and satellite imagery indicated that the storm had strengthened and reached Category 3 intensity on August 18, making it a major hurricane.[14] Despite some wind shear, Bill was upgraded further to Category 4 intensity on August 19 and reached maximum size with hurricane-force winds extending 115 miles (185 km) and tropical storm-force winds extending 290 miles (470 km) from the center.[15]

On August 20, the storm began to weaken, being downgraded to a Category 3, as convection associated with it diminished somewhat.[16] The storm's eyewall also weakened, with a portion of it dissipating later that day. Shear also deteriorated the structure of the storm, with clouds being displaced from the main circulation.[17] However, shortly after, the eye became much better defined and developed several mesovortices, a feature typical of intense hurricanes.[18] On August 21, Bill was downgraded to a Category 2 hurricane as the structure of the storm deteriorated; however, the atmospheric pressure in the eye was 954 mbar (hPa) at that time, equivalent to a strong Category 3 storm.[19] By the morning of August 22, the hurricane completed an eyewall replacement cycle and featured a 55 mi (89 km) wide eye.[20]

Later on August 22, the storm weakened to a Category 1 hurricane as Bill tracked over cooler waters.[21] The storm maintained its intensity through August 23 as it retained its cloud-filled eye and tracked at a quick pace to the north-northeast producing 26.4 m (87 ft) waves at La Have Bank Buoy (station 44142) 42°30′N 64°01′W / 42.5°N 64.02°W / 42.5; -64.02[22] and 16 ft surge on coastlines in New England and Nova Scotia.[23] The storm then made landfall shortly before midnight local time, at Point Rosie, on the Burin Peninsula of Newfoundland as 70 mph (110 km/h) tropical storm.[24] Shortly after this it was downgraded to a tropical storm, and then lost tropical characteristics.[25] The remnants of Bill crossed the Atlantic Ocean as an extratropical storm and later impacted the United Kingdom with heavy rain and surf.[26] On August 26, the remnants of Hurricane Bill were absorbed by a larger extratropical cyclone, near the British Isles.[24]

Preparations

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Bermuda

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Hurricane Bill nearing Bermuda on August 21

On August 18, the Emergency Measures Organisation (EMO) of Bermuda advised the public to begin preparing for Hurricane Bill. Derrick Binns, Permanent Secretary of the Ministry of Labour, Home Affairs and Housing, reported that "We have been following the storm closely since its inception, and today we reviewed our planning and procedures to ensure all are in sync. While we have not as yet issued hurricane warnings, I think it is important to advise residents to check their emergency kits to be sure supplies are adequate."[27] Residents on the island were instructed to review their emergency supplies, while boat owners were urged to secure their watercraft.[28] By August 20, preparations had expanded as the projected path of Bill was to pass 200 miles west-southwest of the British overseas territory early on August 22.[29] Late on August 21, The Causeway bridge linking the eastern parish of St. Georges was closed as well as L.F. Wade International Airport. Ferry service was cancelled until August 23.[30] Late on August 21, tropical storm force winds were observed in Bermuda with some gusts above hurricane force.[31]

United States

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In response to predictions of rough surf and rip currents, the Atlantic Beach, North Carolina fire department planned to increase the number of on-duty lifeguards.[32] On Long Island, New York, local officials began tracking Hurricane Bill and initiating preparations.[33] Local crew workers trimmed trees to reduce the amount of airborne debris. On August 17, the United States Army assessed 30 key buildings for power needs. Residents were urged to stock up on food and emergency supplies as officials estimated that in the event of a hurricane emergency, nearly 650,000 people would not have access to shelter. The Suffolk County Red Cross began organizing catering agencies to prepare meals to supply shelters.[33] The Long Island Power Authority also took preventative measures.[34]

On August 20, the Massachusetts Emergency Management Agency made several conference calls with the National Weather Service about possible impacts from the storm in the state, particularly on Cape Cod.[35] Bill came close enough to the region to warrant a tropical storm warning for a while.[20]

Canada

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Hurricane Bill over Newfoundland on August 24

Peter Bowyer, Program Supervisor of the Canadian Hurricane Centre, advised Nova Scotia residents to monitor the storm's progress and take necessary precautions. He said it is "almost inevitable that the storm will find some part of Eastern Canada. Whether that’s the marine areas or the land district, it's still too far to say."[36] Dozens of flights were canceled ahead of the storm at Halifax Stanfield International Airport and ferry service between Nova Scotia and Newfoundland was temporarily canceled.[37] Offshore, the Exxon Mobil corporation evacuated nearly 200 personnel from a project near Nova Scotia as a precaution.[38] On August 22, officials announced that all parks in Nova Scotia would be closed for the duration of Hurricane Bill.[39]

On August 22, Environment Canada, the meteorological agency of Canada, issued a tropical storm warning from Charlesville in Shelburne County, Nova Scotia eastward to Ecum Secum in the Halifax Regional Municipality. A hurricane watch was issued for areas between Ecum Secum eastward to Point Aconi. The remaining north coast of Nova Scotia, Prince Edward Island and western Newfoundland were placed under a tropical storm watch.[40] Several hours later, the tropical storm warning was extended to include the areas under a hurricane watch and most of Newfoundland was placed under a tropical storm watch.[41] Early on August 23, a tropical storm warning was issued in Newfoundland for areas between Stone's Cove and Cape Bonavista.[42] About 150 people were evacuated from two senior homes in Newfoundland and the town of Placentia was put under a state of emergency in fears of storm surge damage.[43]

Republic of Ireland and United Kingdom

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On August 25, Met Éireann issued gale warnings across the south of Ireland, and advised small boats not to go out to sea until the system had passed. They also forecast up to 1 in (25 mm) of rain across Ireland.[44] The Met Office in the UK issued severe weather warnings in preparation for the arrival of the storm.

Impact

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On August 19, Peter Bray, a British rower attempting to break the record for the quickest solo crossing of the Atlantic was forced to abandon his boat and board the RRS James Cook due to being in the path of Hurricane Bill.[45] Large, life-threatening swells produced by the storm impacted north-facing coastlines of Puerto Rico and Hispaniola as Hurricane Bill approached Bermuda.[46][47]

United States

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Hurricane Bill off the east coast of the United States on August 22

In Massachusetts, outer bands of Hurricane Bill produced significant amounts of rainfall, peaking at 3.74 in (95 mm) in Kingston, Massachusetts. Most areas along the eastern portion of the state received rain during the night of August 22 into the morning of August 23, with several areas exceeding 2 in (51 mm).[48] On Long Island, beach damage was severe; in some areas the damage was the worst since Hurricane Gloria in 1985. Along the coasts of North Carolina, waves averaging 10 ft (3.0 m) in height impacted beaches. In Wrightsville Beach, up to 30 rescues were made due to strong rip currents and large swells; however, only one incident resulted in hospitalization. Severe beach erosion took place at Bald Head Island, where 150 ft (46 m) of beach was washed away, resulting in the loss of the remaining sea turtle nests.[49]

Along the coastlines of Virginia, Maryland, and Delaware, waves were estimated to have reached 8 ft (2.4 m) at the height of the event.[50] Beaches along the Georgia coastline, located nearly 600 mi (970 km) from Bill, recorded large swells from the storm and strong rip currents.[51] In Delaware, waves peaked near 10 ft (3.0 m), resulting in one serious injury after a man was tossed by a wave and thrown face-first into the sand.[52]

 
Waves from Hurricane Bill along the New Jersey coast

Waves along the Georgia coast averaged 5 to 6 ft (1.5 to 1.8 m) in height with some reaching 8 ft (2.4 m). This resulted in numerous lifeguard rescues and some minor coastal flooding.[53] Beaches along Long Island were closed after waves up to 12 ft (3.7 m) began to cause coastal flooding and beach erosion.[54] All beaches around New York City were closed due to the risk of strong rip currents and waves up to 20 ft (6.1 m).[55] In southern New York, a cold front stalled by Hurricane Bill produced torrential rainfall, amounting to at least 2 in (51 mm) in a few hours, causing flash flooding and a tornado in Maine. Lightning produced by severe thunderstorms also left 5,000 residences without power.[56]

A 54-year-old man drowned at New Smyrna Beach, Volusia County, Florida due to the heavy surf.[57] In New York, severe beach erosion caused by the storm resulted in over $35.5 million in losses.[58] A 7-year-old girl drowned after she, her father, and a 12-year-old girl were swept off a rocky ledge near Acadia National Park in Maine on August 23.[59] The three were part of an early afternoon crowd of thousands who lined the Maine's national park's rocky shoreline to watch the high surf and crashing waves. Authorities said that about 20 people were swept away, but 17 of them made back to shore safely. Eleven were sent to area hospitals for spinal cord injuries.[60]

Further inland, a band of heavy rain fueled by tropical moisture from Bill produced upwards of 5 in (130 mm) in southern New Hampshire during an eight-hour span. The intense rainfall led to significant flash flooding that covered several roads and inundated homes.[61] Mudslides also closed roads in portions of the state as hillsides collapsed. Seven people required water rescue after their cars stalled in floodwaters. Overall, the floods left roughly $700,000 in damages in New Hampshire but no fatalities or injuries.[61][62][63]

Bermuda and Atlantic Canada

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Rainfall from Hurricane Bill

The hurricane had little impact in Bermuda. A public high school was designated as an emergency shelter, into which The Salvation Army took six homeless people. Some 3,700 households experienced power outages at some point during the storm, and in some instances cable television and internet services were also interrupted, particularly in the central Spanish Point headland. During the daytime on Saturday, public works crews performed cleanup of light debris, mostly discarded garbage unveiled by the storm.[64]

By the afternoon of August 23, up to 2.3 in (58 mm) of rain had fallen in southern Nova Scotia.[65] At least 32,000 residences in Nova Scotia had lost power due to the storm.[66] At the height of the storm, 45,000 people were without power and rainfall rates reached 1.2 in/h (30 mm/h). Several roads were flooded and overall damage was considered minor. Three people were injured by large waves and a gift shop and a home were badly damaged while a fish shed and breakwater were destroyed at Peggys Cove after being washed away by a 33 ft (10 m) wave.[67] Offshore, a buoy measured waves up to 85 ft (26 m).[68] Winds in Nova Scotia were recorded up to 50 mph (85 km/h) with higher gusts.[69]

In Newfoundland, the Avalon Peninsula experienced the highest winds from Hurricane Bill. A wind gust of 80 mph (130 km/h) was recorded in Cape Race. In St. John's, trees were blown down by the strong winds. However, rains from Bill mostly affected central areas of the island, where rainfall peaked at 2.75 in (70 mm) in Gander.[70] Rains washed out roads, and was responsible for some localized freshwater flooding.[71] Other areas of the central and southern coasts also received rain.[70] Damage from the storm throughout Atlantic Canada reached $10 million.[72]

British Isles and Scandinavia

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Wettest tropical cyclones and their remnants in the United Kingdom
Highest-known totals
Precipitation Storm Location Ref.
Rank mm in
1 150.0 5.91 Bertha 2014 Inverness, Highland [73]
2 135.0 5.31 Charley 1986 Abergwyngregyn, Gwynedd [74]
3 130.0 5.12 Nadine 2012 Ravensworth, North Yorkshire [75]
4 76.0 2.99 Lili 1996 Chale Bay, Isle of Wight [76]
5 61.7 2.43 Zeta 2020 Chipping, Lancashire [77]
6 48.8 1.92 Grace 2009 Capel Curig, Conwy [78]
7 42.2 1.66 Gordon 2006 Wainfleet All Saints, Lincolnshire [79]
8 38.0 1.50 Gonzalo 2014 Glenmoriston, Highland [80]
9 31.0 1.22 Bill 2009 Shap, Cumbria [81]
10 30.0 1.18 Laura 2008 Windermere, Cumbria [82]

Throughout the British Isles, the remnants of Bill produced high winds and heavy rains. All of Ireland and most of the United Kingdom was affected by the storm in some way. Rainfall in the United Kingdom peaked at 31 mm (1.2 in) in Shap.[83] After passing through the British Isles, the remnant system affected parts of Scandinavia before dissipating.[84]

See also

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References

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  2. ^ Avila, Lixion (August 13, 2009). "Tropical Weather Outlook". National Weather Service Raw Text Product. Miami, Florida: Iowa State University. Retrieved July 3, 2019.
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  4. ^ Blake, Eric (August 15, 2009). "Tropical Weather Outlook". National Weather Service Raw Text Product. Miami, Florida: Iowa State University. Retrieved July 3, 2019.
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