was the first Atlantic hurricane
to cause more than an estimated $1 billion in damage (in 1955 dollars, which would be $Expression error: Unrecognized punctuation character ",".
today), including direct costs and the loss of business and personal revenue. It formed
on August 7 from a tropical wave
between the Lesser Antilles
and Cape Verde
. Diane initially moved west-northwestward with little change in its intensity, but began to strengthen rapidly
after turning to the north-northeast. On August 12, the hurricane reached peak sustained winds
of 105 mph (165 km/h), making it a Category 2 hurricane
. Gradually weakening after veering back west, Diane made landfall
near Wilmington, North Carolina
, as a strong tropical storm on August 17, just five days after Hurricane Connie
struck near the same area. Diane weakened further after moving inland, at which point the United States Weather Bureau
noted a decreased threat of further destruction. The storm turned to the northeast, and warm waters from the Atlantic Ocean helped produce record rainfall across the northeastern United States. On August 19, Diane emerged into the Atlantic Ocean southeast of New York City, becoming extratropical
two days later and completely dissipating by August 23.
The first area affected by Diane was North Carolina, which suffered coastal flooding
but little wind and rain damage. After the storm weakened in Virginia, it maintained an area of moisture that resulted in heavy rainfall after interacting with the Blue Ridge Mountains
, a process known as orographic lift
. Flooding affected roads and low-lying areas along the Potomac River
. The northernmost portion of Delaware also saw freshwater flooding, although to a much lesser extent than adjacent states. Diane produced heavy rainfall in eastern Pennsylvania, causing the worst floods on record there, largely in the Poconos
and along the Delaware River
. Rushing waters demolished about 150 road and rail bridges and breached or destroyed 30 dams. The swollen Brodhead Creek
virtually submerged a summer camp, killing 37 people. Throughout Pennsylvania, the disaster killed 101 people and caused an estimated $70 million in damage (1955 USD
). Additional flooding spread through the northwest portion of neighboring New Jersey, forcing hundreds of people to evacuate and destroying several bridges, including one built in 1831. Storm damage was evident but less significant in southeastern New York. (Full article...