Tropical Storm Doria


Tropical Storm Doria was the costliest tropical cyclone in the 1971 Atlantic hurricane season. The fifth tropical storm of the season, Doria developed from a tropical wave on August 20 to the east of the Lesser Antilles, and after five days without development it attained tropical storm status to the east of Florida. Doria turned to the north, and reached peak winds of 65 mph as it was making landfall near Morehead City, North Carolina. It turned to the northeast, and moved through the Mid-Atlantic and New England as a tropical storm before becoming an extratropical storm over Maine on August 29.
In North Carolina, Doria produced moderate rainfall, resulting in localized flooding and damage. The storm spawned a tornado near Norfolk, Virginia, damaging twelve houses and downing hundreds of trees. Tropical Storm Doria dropped heavy precipitation in New Jersey, peaking at 10.29 inches in Little Falls. The rainfall led to record-breaking river levels and flooding in several houses, resulting in damage to dozens of houses across the state. Moderate damage and rainfall continued along its path into New England and southeastern Canada. In all, Tropical Storm Doria caused seven deaths and $147.6 million.

Meteorological history

On August 15, a tropical wave moved off the coast of Africa, and tracked westward while slowly organizing. On August 20, subsequent to the development of a low-level circulation, an area of convection along the wave developed into a tropical depression while located about 1,000 miles east-northeast of Grenada. Initially failing to organize further, the depression moved to the west-northwest, and on August 23, it passed through the northern Lesser Antilles. The depression moved to the north of Puerto Rico, Hispaniola, and the Bahamas, and began to show further signs of organization on August 25. After briefly weakening on August 26, the depression re-strengthened while turning to the north, and attained tropical storm status on August 27 while located 230 miles east of Daytona Beach, Florida.
After reaching tropical storm status, Doria quickly intensified as its wind field expanded while moving northward. The minimum central pressure quickly dropped, as well, and late on August 27, Doria reached its peak intensity of 65 mph while making landfall on North Carolina near Morehead City. The storm maintained its peak winds as it moved north-northeastward through North Carolina, and weakened slightly to a 60 mph tropical storm after entering Virginia on August 28. Doria turned to the northeast, passing through the Chesapeake Bay and Delmarva Peninsula before entering southern New Jersey. It paralleled the state a short distance inland, and after moving through New York City Doria became extratropical over northwestern Maine on August 29. The extratropical remnant continued northeastward until losing its identity near the border of New Brunswick and Quebec in Canada.

Impact

Southeast United States and Virginia

Doria passed near or through the northern Caribbean Islands and the Bahamas as a tropical depression, though effects, if any, are unknown. Tropical Storm Doria passed about 160 miles east of Charleston, South Carolina, though its large wind field produced 22 mph winds in the town. The storm also dropped light rainfall of up to 1.75 inches, and resulted in a storm tide of 5.7 feet above the mean low water level.
Upon making landfall in North Carolina, Doria produced a storm tide of 2 feet above normal at Cape Fear. Sustained winds in the state peaked at 41 mph in Hatteras, while gusts reached 69 mph in Atlantic Beach. In most areas, wind damage was minimal. Tropical Storm Doria dropped moderate rainfall across the state, including a report of 4.17 inches in Cape Hatteras. Over 5 inches of rain fell around the Albemarle Sound and near New Bern. The rainfall led to flooding and mudslides, which blocked roads and highways. In localized areas, the flooding caused severe damage to roads and houses. Flooding from Doria also damaged water and sewage systems. Rainfall in the state persisted for two weeks after the passage of Doria.
In Virginia, the storm produced a storm tide of 3.6 feet above normal in Norfolk. Sustained winds peaked at 60 mph in Langley Air Force Base, while gusts reached 71 mph in Norfolk. The bands of the storm spawned an F1 tornado near Portsmouth and Chesapeake, damaging twelve homes and downing hundreds of trees. Damage from the tornado amounted to $250,000. Rainfall from Doria was moderate, peaking at 6.44 inches at a location 2 miles south-southeast of Halifax. One person drowned in Alexandria when she fell into a draining ditch. The storm severely damaged a large warehouse in Norfolk, as well. Damage in Virginia totaled $375,000. Floodwaters from Doria clogged sewage systems near Norfolk, Virginia with sand and silt. This forced the sewage to be dumped into the Chesapeake Bay, resulting in the closure of several beaches for days.

Mid-Atlantic states

Tropical Storm Doria dropped 3.85 inches of rain in Washington National Airport in Washington, D.C. In Maryland, the storm resulted in tides 2.7 feet above normal in Fort McHenry. Rainfall in the state peaked at 4.39 inches in Baltimore, while wind gusts reached a maximum of 63 mph at the United States Coast Guard station in Ocean City. The storm produced 5.09 inches of rain in Wilmington, Delaware and a storm tide of 3.2 feet above normal in Lewes. In Pennsylvania, the passage of Tropical Storm Doria resulted in 6.57 inches of rain and peak wind gusts of 73 mph in Philadelphia. Moderate winds downed trees and power lines in Pennsylvania, and one person died in the state. Several rivers in the southeastern portion of the state experienced record-breaking flooding.
In New Jersey, Doria produced wind gusts of up to 54 mph and storm tides 5.3 feet above normal in Atlantic City. The outer bands of the storm spawned an F2 tornado near Cape May. It moved quickly northward through Cape May County, and caused about $250,000 in damage in damage along its 29-mile path. The storm dropped heavy rainfall, peaking at 10.29 inches in Little Falls. Record 24-hour rainfall totals occurred in Newark with 7.84 inches and Trenton with 7.55 inches. The rainfall led to record flooding on several small streams in the state. The Beden Brook crested at over 5 feet above normal, which destroyed a bridge near Princeton. The Raritan River at Manville crested at 9.8 feet, a record that stood until the passage of Hurricane Floyd in 1999. The heavy rainfall overtopped the levee system in Zarephath, causing severe damage to the Alma White College and preventing it from opening in the fall of 1971. The rainfall also flooded two fire houses in Somerville with several feet of water, and the water treatment plant in Bridgewater Township with 18 inches of floodwaters in what was catalogued as a 50-year flood event. Following the flooding to the water treatment plant, officials raised the beams of the plant to withstand a 500-year flood event. Eleven houses experienced flooding damage in Montgomery Township. Doria killed three people and caused $138 million in damage in the state.

Northeast United States and Canada

Tropical Storm Doria produced moderate winds in New York City with gusts to 48 mph. The storm tide reached 3.8 feet above normal at Battery Park, and rainfall peaked at 5.96 inches. LaGuardia Airport recorded 2.29 inches of rain in a one-hour period. The threat of the storm cancelled a baseball game between the Los Angeles Dodgers and the New York Mets. Heavy rainfall flooded streets and subways in New York. In Connecticut, Doria produced up to 3.12 inches of rain and wind gusts peaking at 48 mph in Hartford. Doria dropped light rain in Rhode Island, including a report of 0.97 inches in Providence. The storm also produced wind gusts of up to 61 mph and a storm tide of 5.9 feet above mean water level. In Boston, rainfall totaled to 0.83 inches, while wind gusts peaked at 80 mph at the Blue Hill Meteorological Observatory. Two people drowned in Marblehead when they were swept away by surf from the storm.
The storm dropped moderate rainfall in Vermont, including a total of 5.73 inches in Mays Mill. The rainfall caused road washouts, landslides, and damage to bridges in the southeast portion of the state. The center of Tropical Storm Doria passed over south-central New Hampshire, resulting in heavy rains and damaging winds. Sustained winds in Maine were generally around 30 mph, while gusts peaked at 61 mph in Lewiston. The strong winds resulted in downed trees and widespread outages to power and telephone service. The winds also damaged a mobile home in Sabattus and a steel shed in Lewiston. Doria produced moderate rainfall, including a total of 1.75 inches in Lewiston, though little flooding occurred.
Moisture from Tropical Storm Doria entered southeastern Canada, peaking at over 3 inches in the Montérégie region of Quebec. The rainfall led to severe flooding in Victoriaville, causing damage to roads, bridges, and crops. Damage totalled to about $250,000.
Throughout its path, Tropical Storm Doria caused seven deaths and $147.6 million in damage.
In early September 1971, President Richard Nixon declared counties in New Jersey, New York, and Pennsylvania as disaster areas due to heavy rains and flooding. This allowed citizens in disaster areas to apply for federal assistance.