Posts : 409
Join date : 2011-06-10
|Subject: The depression Fri Jun 24, 2011 9:30 am|| |
The area of disturbed weather that would soon become Chantal began in a large envelope of low pressure on the morning of September 10. The disturbed weather, nested off the coast of Bermuda, was one of the remnants of an old frontal trough that had extended from Hispaniola to the central north Atlantic Ocean. This particular area of disturbed weather become part of the northeast portion of a low-pressure system. On September 10, a reconnaissance aircraft found sustained winds of 30 mph (50 km/h) and a 1010 millibar (29.83 inHg) pressure reading. This reading indicated the system developed into the fifth tropical depression of the 1983 season.
The depression moved to within 100 miles (160 kilometers) of Bermuda and slowly intensified. Late that afternoon, Tropical Depression Five had intensified into a 40 mph (60 km/h) storm and was named Chantal. Chantal intensified rapidly, intensifying to hurricane status late on September 11. Chantal turned to the east and gained a weak outflow with cirrus clouds. The structure changed little over the next 24 hours, until becoming disorganized on the night of the 12th. Chantal was downgraded to a tropical storm around the same time.
Overnight, all convection in Chantal dissipated, and its forward speed decreased as it headed to the north. A weak wave caused Chantal to speed up and the system was absorbed in the frontal system by the night of September 14. Effects on Bermuda were minimal, with the island getting winds of up to 20 mph (25 km/h) and few thundershowers. Chantal generated swells of 30–40 ft (9–12 m) offshore.send textgolf argentina