Tropical Storm Carrie (1972)
Encyclopedia
Tropical Storm Carrie was a strong tropical storm that affected the East Coast of the United States in early September 1972. The third tropical cyclone
Tropical cyclone
A tropical cyclone is a storm system characterized by a large low-pressure center and numerous thunderstorms that produce strong winds and heavy rain. Tropical cyclones strengthen when water evaporated from the ocean is released as the saturated air rises, resulting in condensation of water vapor...

 of the 1972 Atlantic hurricane season
1972 Atlantic hurricane season
The 1972 Atlantic hurricane season officially began on June 1, 1972, and lasted until November 30, 1972. These dates conventionally delimit the period of each year when most tropical cyclones form in the Atlantic basin. A strong El Niño kept hurricane activity at a minimum, and in fact the season...

, Carrie formed on August 29 from a complex sequence of meteorological events starting with the emergence of a tropical wave
Tropical wave
Tropical waves, easterly waves, or tropical easterly waves, also known as African easterly waves in the Atlantic region, are a type of atmospheric trough, an elongated area of relatively low air pressure, oriented north to south, which move from east to west across the tropics causing areas of...

 into the Atlantic in the middle of August. Tracking nominally northward throughout its life, Carrie reached an initial peak intensity as a moderate tropical storm before nearly weakening back into tropical depression status. The storm began to reintensify owing to baroclinic processes
Baroclinity
In fluid dynamics, the baroclinity of a stratified fluid is a measure of how misaligned the gradient of pressure is from the gradient of density in a fluid...

 after turning toward the northwest; its winds of 70 miles per hour (112.7 km/h) eclipsed the cyclone's previous maximum strength as it was transitioning into an extratropical system
Extratropical cyclone
Extratropical cyclones, sometimes called mid-latitude cyclones or wave cyclones, are a group of cyclones defined as synoptic scale low pressure weather systems that occur in the middle latitudes of the Earth having neither tropical nor polar characteristics, and are connected with fronts and...

. The extratropical remnants of Carrie skirted eastern New England
New England
New England is a region in the northeastern corner of the United States consisting of the six states of Maine, New Hampshire, Vermont, Massachusetts, Rhode Island, and Connecticut...

 before making landfall in Maine
Maine
Maine is a state in the New England region of the northeastern United States, bordered by the Atlantic Ocean to the east and south, New Hampshire to the west, and the Canadian provinces of Quebec to the northwest and New Brunswick to the northeast. Maine is both the northernmost and easternmost...

 on September 4 and dissipating over the Gulf of Saint Lawrence
Gulf of Saint Lawrence
The Gulf of Saint Lawrence , the world's largest estuary, is the outlet of North America's Great Lakes via the Saint Lawrence River into the Atlantic Ocean...

 over the next two days.

Carrie had a minimal impact on the East Coast south of New England, limited to increased swells, gusty winds, and light rainfall. The worst of the storm occurred over southeastern New England, where wind gusts reached 84 mph (135.2 km/h) and rainfall exceeded 1 ft (0.3048 m). Damage was most severe along and slightly inland from the coast. Thousands of people became stranded on offshore islands of Massachusetts
Massachusetts
The Commonwealth of Massachusetts is a state in the New England region of the northeastern United States of America. It is bordered by Rhode Island and Connecticut to the south, New York to the west, and Vermont and New Hampshire to the north; at its east lies the Atlantic Ocean. As of the 2010...

 after dangerous conditions created by the storm prompted the suspension of steamship service. Overall damage was generally light, with total monetary losses valued at $1,780,000, and four deaths are blamed on the storm.

Meteorological history

The origins of Tropical Storm Carrie are traced back to a tropical wave—an elongated area of low atmospheric air pressure
Low pressure area
A low-pressure area, or "low", is a region where the atmospheric pressure at sea level is below that of surrounding locations. Low-pressure systems form under areas of wind divergence which occur in upper levels of the troposphere. The formation process of a low-pressure area is known as...

—that emerged from the western coast of Africa on August 15, 1972. A relatively strong weather system, the wave progressed westward, but by the time it had reached the Leeward Islands
Leeward Islands
The Leeward Islands are a group of islands in the West Indies. They are the northern islands of the Lesser Antilles chain. As a group they start east of Puerto Rico and reach southward to Dominica. They are situated where the northeastern Caribbean Sea meets the western Atlantic Ocean...

 ten days later, it had degenerated substantially. The influence of a nearby upper-level
Cold-core low
A cold-core low, also known as a cold low or cold-core cyclone, is a cyclone aloft which has an associated cold pool of air residing at high altitude within the Earth's troposphere. It is a low pressure system which strengthens with height in accordance with the thermal wind relationship. These...

 low pressure system caused the disturbance to further deteriorate, and the resultant remnant circulation drifted toward the northwest; by August 28, it was situated at a position just offshore southeastern Florida
Florida
Florida is a state in the southeastern United States, located on the nation's Atlantic and Gulf coasts. It is bordered to the west by the Gulf of Mexico, to the north by Alabama and Georgia and to the east by the Atlantic Ocean. With a population of 18,801,310 as measured by the 2010 census, it...

. The low pressure system maintained a cold core
Cold-core low
A cold-core low, also known as a cold low or cold-core cyclone, is a cyclone aloft which has an associated cold pool of air residing at high altitude within the Earth's troposphere. It is a low pressure system which strengthens with height in accordance with the thermal wind relationship. These...

 and had not yet established itself at the surface. On August 29, the low began moving northward in response to an approaching trough
Trough (meteorology)
A trough is an elongated region of relatively low atmospheric pressure, often associated with fronts.Unlike fronts, there is not a universal symbol for a trough on a weather chart. The weather charts in some countries or regions mark troughs by a line. In the United States, a trough may be marked...

. For the first time, a low-level circulation center had been identified in association with the system, and the storm became a tropical depression at 1200 UTC while located east of the central Florida peninsula. The depression tracked steadily northeastward as it gradually intensified.

On August 31, reconnaissance
Reconnaissance
Reconnaissance is the military term for exploring beyond the area occupied by friendly forces to gain information about enemy forces or features of the environment....

 aircraft flying into the cyclone reported maximum sustained winds of up to around 55 mph (88.5 km/h). Post-storm reanalysis estimated the depression had strengthened into a tropical storm at around 0000 UTC on August 31. Operationally, however, it was not recognized as such until 2200 UTC that day, when it was assigned the name Carrie. At the time, the system was located approximately 350 miles (563.3 km) east of Cape Hatteras, North Carolina. A small storm, Carrie slowed drastically in forward movement as it curved northward. By the time it was identified as a tropical storm in real-time, Carrie had already reached its initial peak intensity with maximum sustained winds of 60 mph (96.6 km/h) and a minimum central pressure
Atmospheric pressure
Atmospheric pressure is the force per unit area exerted into a surface by the weight of air above that surface in the atmosphere of Earth . In most circumstances atmospheric pressure is closely approximated by the hydrostatic pressure caused by the weight of air above the measurement point...

 of 1002 millibars (29.6 inHg), and strong wind shear
Wind shear
Wind shear, sometimes referred to as windshear or wind gradient, is a difference in wind speed and direction over a relatively short distance in the atmosphere...

 inhibited immediate strengthening as it continue to slow to a drift. On September 1, Carrie began to weaken, and by early on September 2, it had dwindled to a minimal tropical storm with winds of only 40 mph (64.4 km/h). Satellite imagery indicated that the storm's center of circulation had become distorted with little or no associated convection. At its weakest, the storm's highest winds were found far from the center, likely generated more by the increasing pressure gradient
Pressure gradient
In atmospheric sciences , the pressure gradient is a physical quantity that describes in which direction and at what rate the pressure changes the most rapidly around a particular location. The pressure gradient is a dimensional quantity expressed in units of pressure per unit length...

 in relation to an anticyclone
Anticyclone
An anticyclone is a weather phenomenon defined by the United States' National Weather Service's glossary as "[a] large-scale circulation of winds around a central region of high atmospheric pressure, clockwise in the Northern Hemisphere, counterclockwise in the Southern Hemisphere"...

 to the north than by the low pressure center itself.

A low pressure system moving through the Mid-Atlantic states
Mid-Atlantic States
The Mid-Atlantic states, also called middle Atlantic states or simply the mid Atlantic, form a region of the United States generally located between New England and the South...

 pulled Carrie northwest, back toward the United States East Coast, at an accelerated forward speed. Later on September 2, the storm had begun to show signs of reorganization, including an improved appearance on satellite imagery and the development of some thunderstorm activity, although significant reintensification was considered unlikely. However, with the advance of a trough embedded in the westerlies, Carrie quickly deepened under the influence of baroclinic processes
Baroclinity
In fluid dynamics, the baroclinity of a stratified fluid is a measure of how misaligned the gradient of pressure is from the gradient of density in a fluid...

. While the storm's maximum sustained winds increased, it also began to shed its tropical characteristics and resemble an extratropical cyclone
Extratropical cyclone
Extratropical cyclones, sometimes called mid-latitude cyclones or wave cyclones, are a group of cyclones defined as synoptic scale low pressure weather systems that occur in the middle latitudes of the Earth having neither tropical nor polar characteristics, and are connected with fronts and...

. Moving once again toward the north-northeast, Carie was declared extratropical by the National Hurricane Center during the late afternoon on September 2. In the official Atlantic Hurricane Database
HURDAT
The North Atlantic hurricane database, or HURDAT, is the database for all tropical cyclones in the Atlantic Ocean, Gulf of Mexico and Caribbean Sea, since 1851.-History:...

, however, Carrie is listed as a tropical cyclone until 1800 UTC on September 3, at which point it possessed winds of 70 mph (112.7 km/h) and a central barometric pressure of 993 mb. As a result, these data are considered representative of the storm's peak intensity. Regardless of its status, the storm was a large and intense system as it progressed north and neared New England
New England
New England is a region in the northeastern corner of the United States consisting of the six states of Maine, New Hampshire, Vermont, Massachusetts, Rhode Island, and Connecticut...

, generating strong winds and rough surf along the coast. Having fully transitioned into an extratropical system, the storm made landfall near Eastport, Maine
Eastport, Maine
Eastport is a small city in Washington County, Maine, United States. The population was 1,640 at the 2000 census. The principal island is Moose Island, which is connected to the mainland by causeway...

 on September 4 and slowly weakened as it continued north up the Gulf of Saint Lawrence. The cyclone fully dissipated on September 6 in the Gulf.

Preparations and impact

The pressure gradient between Carrie and the high pressure area
Anticyclone
An anticyclone is a weather phenomenon defined by the United States' National Weather Service's glossary as "[a] large-scale circulation of winds around a central region of high atmospheric pressure, clockwise in the Northern Hemisphere, counterclockwise in the Southern Hemisphere"...

 to its north produced gusty northeasterly winds, and by extension high seas. In response, the National Weather Service
National Weather Service
The National Weather Service , once known as the Weather Bureau, is one of the six scientific agencies that make up the National Oceanic and Atmospheric Administration of the United States government...

 issued small craft warnings
Small craft advisory
A small craft advisory is a type of warning issued by the National Weather Service in the United States, most frequently in coastal areas. It is issued when winds have reached, or are expected to reach within 12 hours, a speed marginally less than gale force....

 starting on September 1 and extending from Massachusetts to the Carolinas. Gale warning
Gale warning
A gale warning is a warning issued by weather services in maritime locations about the existence of winds of gale force or above or the imminent occurrence of gales at sea...

s were posted the next day from southern New Jersey
New Jersey
New Jersey is a state in the Northeastern and Middle Atlantic regions of the United States. , its population was 8,791,894. It is bordered on the north and east by the state of New York, on the southeast and south by the Atlantic Ocean, on the west by Pennsylvania and on the southwest by Delaware...

 to the coast of central New England, and the small craft warnings were brought north to Maine. Ongoing, as well as the threat of continued heavy rainfall necessitated the issuance of flash flood watch
Flash flood watch
A Flash flood watch is issued by the National Weather Service when conditions are favorable for flash flooding in flood-prone areas where grounds are already saturated from recent rains....

es throughout eastern Massachusetts, southeastern New Hampshire
New Hampshire
New Hampshire is a state in the New England region of the northeastern United States of America. The state was named after the southern English county of Hampshire. It is bordered by Massachusetts to the south, Vermont to the west, Maine and the Atlantic Ocean to the east, and the Canadian...

, and southern and central Maine on September 3. Due to rough surf, the beach at Virginia Beach, Virginia
Virginia Beach, Virginia
Virginia Beach is an independent city located in the Hampton Roads metropolitan area of Virginia, on the Atlantic Ocean at the mouth of the Chesapeake Bay...

 was closed to swimmers on August 31.

Mid-Atlantic

Carrie had minimal effects on the East Coast south of the Mid-Atlantic states
Mid-Atlantic States
The Mid-Atlantic states, also called middle Atlantic states or simply the mid Atlantic, form a region of the United States generally located between New England and the South...

, limited to moderate winds and generally light rainfall. Precipitation at Norfolk, Virginia
Norfolk, Virginia
Norfolk is an independent city in the Commonwealth of Virginia in the United States. With a population of 242,803 as of the 2010 Census, it is Virginia's second-largest city behind neighboring Virginia Beach....

 reached 1.12 inches (28.4 mm) between September 1 and 3, and pressure fell to a modest 1012 mb. Sustained winds were recorded at 28 mph (45.1 km/h), with only slightly higher gusts, although the Chesapeake Light
Chesapeake Light
Chesapeake Light is an offshore lighthouse marking the entrance to the Chesapeake Bay. Once considered for decommissioning, it remains active and supports a NOAA weather data site.-History:...

 unofficially reported gusts to near 50 mph (80.5 km/h). Damage in the area was minimal with the exception of beach erosion
Coastal erosion
Coastal erosion is the wearing away of land and the removal of beach or dune sediments by wave action, tidal currents, wave currents, or drainage...

, and tides 2.5 foot (0.762 m) above normal triggered minor flooding. Moderate rainfall, approaching or reaching 5 in (127 mm), fell across the southern Delmarva Peninsula
Delmarva Peninsula
The Delmarva Peninsula is a large peninsula on the East Coast of the United States, occupied by most of Delaware and portions of Maryland and Virginia...

. Equally minor effects were felt in the Atlantic City, New Jersey
Atlantic City, New Jersey
Atlantic City is a city in Atlantic County, New Jersey, United States, and a nationally renowned resort city for gambling, shopping and fine dining. The city also served as the inspiration for the American version of the board game Monopoly. Atlantic City is located on Absecon Island on the coast...

, area, with comparable or even less significant reports of winds and rainfall and damages limited to coastal flooding and beach erosion. Since the adverse weather conditions fell on a portion of the Labor Day
Labor Day
Labor Day is a United States federal holiday observed on the first Monday in September that celebrates the economic and social contributions of workers.-History:...

 weekend, the local resort industry suffered economical losses.

New England

The brunt of the storm occurred in southeastern New England, particularly coastal Massachusetts, where strong gusts battered the shore. The distribution of winds resulting from the storm more closely resembled that of a nor'easter
Nor'easter
A nor'easter is a type of macro-scale storm along the East Coast of the United States and Atlantic Canada, so named because the storm travels to the northeast from the south and the winds come from the northeast, especially in the coastal areas of the Northeastern United States and Atlantic Canada...

 than a cyclone of tropical origin, in which the wind field would typically be concentrated closer to its center. Instead, the strongest winds remained well removed from the center of circulation, but were nonetheless severe; gusts reached 84 mph (135.2 km/h) at Point Judith, Rhode Island, and 69 mph (111 km/h) on Cape Cod
Cape Cod
Cape Cod, often referred to locally as simply the Cape, is a cape in the easternmost portion of the state of Massachusetts, in the Northeastern United States...

, Massachusetts. Sustained winds throughout the region were generally below 50 mph (80.5 km/h). In Boston
Boston
Boston is the capital of and largest city in Massachusetts, and is one of the oldest cities in the United States. The largest city in New England, Boston is regarded as the unofficial "Capital of New England" for its economic and cultural impact on the entire New England region. The city proper had...

, Massachusetts, winds gusted to 46 mph (74 km/h). The storm brought down trees and powerlines, blocking roads and damaging property. Structural damage was also evident, especially to buildings under construction, and an entire cottage in Rockland, Maine
Rockland, Maine
Rockland is a city in Knox County, Maine, in the United States. As of the 2010 census, the city population was 7,297. It is the county seat of Knox County. The city is a popular tourist destination...

 was blown off its foundation.

Rainfall in southeastern New England was heavy, locally exceeding 10 in (254 mm). On the island of Martha's Vineyard
Martha's Vineyard
Martha's Vineyard is an island located south of Cape Cod in Massachusetts, known for being an affluent summer colony....

, a storm total of 12.5 in (317.5 mm) was reported, the highest known precipitation sum resulting from Carrie. The most torrential rains were usually confined to within 70 mi (112.7 km) of the coast. The deluge swelled streams, inundated cellars, and washed out a railroad near Eagle Lake, Maine
Eagle Lake, Maine
Eagle Lake is a town in Aroostook County, Maine, United States. The town's population was 815 at the 2000 census. The town was named by a body of troops heading from Bangor to the Aroostook War for the many eagles that they saw around the lake...

, derailing a train. Along the coast, rough surf caused beach erosion and swamped hundreds of small craft. On September 3, choppy conditions forced the suspension of steamship services to and from the mainland and the islands of Martha's Vineyard and Nantucket. Thousands of tourists and seasonal residents became stranded on the islands, creating what officials described as a "logistical problem". During the height of the storm, around 20,000 Narragansett Electric Company customers lost power, with scattered power outages reported elsewhere throughout New England.

In general, damage from Tropical Storm Carrie and its extratropical remnants was light. Total monetary damage was estimated at $1,780,000 in 1972 terms, of which $1,200,000 in losses was inflicted on Massachusetts. Losses totaled $350,000 in Rhode Island, $200,000 in Maine, and $30,000 in New Hampshire. Four fatalities were attributed to the storm: two in the aftermath of boating accidents in Massachusetts, and two due to rough surf along the coast of Maine. In the aftermath, a local disaster area was declared for the town of Plymouth. The weakening remnants of Carrie produced strong winds throughout New Brunswick
New Brunswick
New Brunswick is one of Canada's three Maritime provinces and is the only province in the federation that is constitutionally bilingual . The provincial capital is Fredericton and Saint John is the most populous city. Greater Moncton is the largest Census Metropolitan Area...

 on September 5 and 6, peaking at 69 mph (111 km/h). In Saint John
Saint John, New Brunswick
City of Saint John , or commonly Saint John, is the largest city in the province of New Brunswick, and the first incorporated city in Canada. The city is situated along the north shore of the Bay of Fundy at the mouth of the Saint John River. In 2006 the city proper had a population of 74,043...

, where wind gusts reached 49 mph (78.9 km/h), there were reports of downed telephone wires and trees. Widespread power outages occurred throughout communities in the province. Only light rain fell in Saint John, and no flooding was evident. The storm damaged or destroyed numerous boats in Charlo, New Brunswick
Charlo, New Brunswick
Charlo is a Canadian village in Restigouche County, New Brunswick.Situated on the south shore of Chaleur Bay, the community was first settled by Acadians in 1799 and incorporated in 1966....

.

Oceanic currents produced by the storm washed cells of the harmful alga Alexandrium fundyense
Alexandrium fundyense
Alexandrium fundyense is a dinoflagellate. It produces toxins that induce paralytic shellfish poisoning , and is a common cause of red tide.-References:...

south and west into the coastal waters of New England. The alga releases toxins that cause shellfish poisoning and is native to the Bay of Fundy
Bay of Fundy
The Bay of Fundy is a bay on the Atlantic coast of North America, on the northeast end of the Gulf of Maine between the Canadian provinces of New Brunswick and Nova Scotia, with a small portion touching the U.S. state of Maine...

. Several weeks after the storm, a massive bloom of the alga occurred offshore the northeastern United States for the first time, and the species bloomed every year post-Carrie.

See also

The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.
 
x
OK