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martin191919|2014-7-4 22:01
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加拿大氣象部門對東岸發Tropical storm warning
Tropical cyclone information statement for:
NEW BRUNSWICK
NEWFOUNDLAND
NOVA SCOTIA
PRINCE EDWARD ISLAND
QUEBEC MARITIME
For hurricane Arthur.
The next statement will be issued by 3:00 PM ADT.
Hurricane Arthur to impact Atlantic Canada with high winds and heavy rain this weekend.
1. Summary of basic information at 9.00 AM ADT.
Location: 36.5 north 74.8 west.
About 150 kilometres northeast of Cape Hatteras.
Maximum sustained winds: 150 km/h.
Present movement: northeast near 35 km/h.
Minimum central pressure: 973 MB.
2. Public weather impacts and warnings summary.
Tropical storm warnings are in effect for Digby to Yarmouth to Halifax counties. Tropical storm watches are in effect for the remainder of Nova Scotia and Prince Edward Island. Tropical storm watches are also in effect for portions of Southern and Eastern New Brunswick.
Hurricane Arthur is accelerating northeastward northeast of Cape Hatteras, North Carolina. A trough of low pressure is moving eastward from New England, guiding Arthur toward Atlantic Canada.
Landfall of Arthur is forecast to occur in Southwestern Nova Scotia Saturday morning as a strong storm at, or near, hurricane strength. Arthur is forecast to become a post-tropical storm as it tracks across Nova Scotia to lie in the Southern Gulf of St Lawrence Saturday night.
The public should pay close attention regarding weekend plans that may be sensitive to high wind and heavy rain conditions. It is emphasized that updated forecasts should be consulted for the latest forecast decisions and rationale. These are issued four times daily.
A. Wind.
Tropical storm warnings are in effect for Digby to Yarmouth to Halifax counties. Tropical storm watches are in effect for the remainder of Nova Scotia, Prince Edward Island, and portions of Southern and Eastern New Brunswick.
Strong winds are forecast on Saturday for much of the southern Maritimes with the strongest winds forecast to gust to 100 km/h over Southwestern Nova Scotia. Elsewhere over portions of the southern Maritimes, winds gusting to 80 or 90 km/h are expected.
In addition, it is likely that strong wind gusts will occur just as Arthur passes by for Southern and Eastern New Brunswick, Prince Edward Island, and the remainder of Nova Scotia by midnight Saturday night. Wind warnings may need to be extended to these regions later today.
Early Sunday morning, gusty winds are possible for portions of Quebec bordering the Gulf of St Lawrence.
During the day Sunday gusty winds are likely for parts of Newfoundland. However, winds are not expected to reach warning criteria.
B. Rainfall.
Heavy rainfall is forecast for all of New Brunswick and the Gaspé region of Quebec where rainfall warnings are in effect. Over these regions general amounts of 50 to 100 millimetres are likely with a good probability of higher amounts in some localities.
Heavy rainfall is also forecast for other regions adjacent to the golf of St Lawrence including Anticosti Island, lower Quebec Northshore and Northern Prince Edward Island where rainfall warnings may be issued sometime today. The rainfall rates are of particular concern since they could exceed 15 millimetres per hour during a period of several hours.
Over the southern Maritimes and Newfoundland, rainfall amounts are expected to be less. However, locally heavy downpours are likely over some areas.
C. Surge/waves.
Storm surge and large waves are possible with Arthur. High waves and pounding surf can be expected along the Atlantic coast of Nova Scotia Saturday morning and afternoon with the arrival of storm. High waves are also expected along the Southern Gulf of St Lawrence coastlines Saturday afternoon and evening.
High water levels at the coast could be an issue if the arrival of Arthur coincides with high tide. This timing will be assessed further as we get closer to the storm's arrival. Storm surge warnings may be required for Southeastern New Brunswick, the Northumberland Strait and parts of the Atlantic coast of Nova Scotia.
3. Marine weather impacts and warnings summary.
Hurricane force wind warnings are in effect for Lurcher and Browns Bank marine areas. Storm and gale warnings are in effect for the remainder of the Maritimes marine district.
Mariners should remain on alert and stay tuned for forecast updates.
Visit weather.gc.ca/hurricane (all in lower case) for the latest:
- forecast position, central pressure table.
- strength and predicted wind radii table.
- hurricane track information map.
- technical discussion.
Please also refer to the public and marine forecasts and warnings issued by Environment Canada for your area.
Forecaster(s): hatt/fogarty/couturier
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