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Canadian Tropical Cyclone Season Summary for 1997
Prepared by: Craig Clarke
The 1997 tropical cyclone season had been expected by some to be a third consecutive busy season. However, as it turned out, only eight storms developed, of which seven were named. Of the seven named storms, three became hurricanes.
1997 Storm Tracks Image
For the Canadian Hurricane Centre (CHC), the 1997 season was very quiet. Although four of these storms entered the CHC Response Zone (RZ), only two neared or entered the CHC Area of Responsibility (AOR). A fifth storm only neared the RZ; consequently, no action was taken.
|Hurricane Information Statements|
Ana (June 30–July 4)
The first storm of the season never attained hurricane status. Ana formed just off the coast of South Carolina--about 450 km south-southeast of Cape Hatteras--then moved slowly eastward. During the early hours of July 1, having attained sustained winds of approximately 75 km/h, Ana was analyzed as a tropical storm. A trough moved off the Atlantic seaboard on July 2, causing Tropical Storm Ana to accelerate northeastward. During the afternoon of July 3 Ana entered the RZ and was downgraded to a tropical depression shortly thereafter. Subsequently, the storm continued to move northeastward and weaken. By the evening of July 4, the remnant low was last analyzed about 650 km south of Newfoundland. Neither the centre of Ana nor that of the remnant low entered the AOR.
The first CHC bulletin of the 1997 hurricane season was issued during the evening of July 1. The only effects from ANA were marginal gales over the southern marine waters of the Maritime provinces.
Bill (July 11–13)
The season’s second storm formed during the morning hours of July 11 about 750 km southeast of Cape Hatteras. Moving northeastward during the morning of July 12, Tropical Storm Bill became the season’s first hurricane, with winds near 120 km/h. Hurricane Bill was short-lived, however, as it was downgraded to a tropical storm during the same evening. By the late morning of July 13, the remnant low of Bill was about 350 km east of St. John’s, Newfoundland. It then moved northward towards Greenland.
Gale and storm warnings were issued by both the Maritimes Weather Centre and the Newfoundland Weather Centre for southern marine waters. No inland warnings were issued. Maximum sustained winds within the AOR were near 111 km/h and most of the heavy precipitation remained offshore.
Claudette (July 13–16)
Tropical Storm Claudette formed about 650 km southeast of Cape Hatteras. After moving towards the north-northeast for approximately 24 hours, Claudette turned eastward before being downgraded to a low pressure system during the afternoon of July 16. At this time its position was about 900 km south of Sable Island, Nova Scotia. This track brought Tropical Storm Claudette through the RZ between the afternoon of July 15 and the early morning of July 16.
No significant effects were observed or analyzed within the AOR.
Danny (July 16–26)
Tropical Storm Danny formed over the northern Gulf of Mexico on July 17 and was upgraded to a hurricane during the early hours of July 18. Hurricane Danny moved northeastward across the southeast United States and was downgraded to a tropical storm before moving off the east coast about 200 km north of Cape Hatteras. Continuing in a northeastward direction, Danny entered the RZ during the evening of July 24. This motion brought the storm to about 100 km southeast of Cape Cod. Thereafter, Danny weakened while turning eastward. The remnant low continued eastward and by the morning of July 27 was about 450 km southeast of Newfoundland, and on its way out to the open Atlantic.
The CHC started issuing prognostic messages and hurricane information statements during the early hours of July 25 as Danny entered the RZ. Its eastward motion on July 26 and 27 brought the remnant low across the southern marine waters of the Maritimes and Newfoundland. Gale and storm warnings were issued by both the Maritimes Weather Centre and the Newfoundland Weather Centre. Significant wave heights of 6–7 metres were also forecast. In addition, 15 mm of rain were forecast for southwest Nova Scotia with higher amounts expected offshore.
Subsequent analyses indicated 30–40 knots winds and maximum seas of 5–7 metres over southern marine waters south of the Maritimes. Near 20 mm of rain were reported over extreme southwestern Nova Scotia. Little or no effects were felt further inland.
The final message for Danny was issued on the morning of July 26.
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