Hurricane Bill - August 22-24,
2009
A well-organized tropical wave and low pressure center moved
offshore the African coast on August 12th. By the 15th, it was
deemed
a tropical depression. Later in the day, the system continued to
develop and was designated Tropical Storm Bill. Bill moved on a
parabolic
track around the subtropical ridge, becoming a hurricane in the central
tropical Atlantic on the 17th, and a major hurricane east of the Leeward
Islands on the 18th. After peaking in intensity on the 19th, Bill
moved northwest and developed a large eye while weakening.
Turning
northward, Bill moved over cooler waters and steadily weakened as it
moved offshore New England and much of Atlantic Canada, making
landfall in Newfoundland late on the 23rd as a hurricane as it was
evolving into an extratropical cyclone. The system crossed the
northern
Atlantic ocean, impacting Great Britain with heavy rains and
significant surf. Below are the storm total graphics for
Bill. Data was
compiled
from the
Northeast River Forecast Center and Environment Canada. The peak
of heavy rainfall in New Hampshire occurred indirectly with
the storm, as moisture pooled along a frontal boundary to its
northwest. Rainfall from southeast New England through eastern
Atlantic Canada
was directly associated with Bill's rain shield.