Issued 08:00 PM ADT 04 August 2020
Tonight and Wednesday.
Strong wind warning in effect.
Wind southeast 15 to 20 knots increasing to south 30 late overnight then veering to southwest 20 to 25 Wednesday morning. Wind diminishing to southwest 15 to 20 Wednesday afternoon.
Showers overnight and Wednesday morning. Fog patches.
Zoom-in to make a selection
Ice ForecastsIssued 10:00 AM EDT 25 May 2020
Forecasts available to mariners upon request.
Warnings (In effect)
Grand MananIssued 8:00 PM ADT 04 August 2020
'Strong' winds of 20 to 33 knots are occurring or expected to occur in this marine area. Please refer to the latest marine forecasts for further details and continue to monitor the situation through Canadian Coast Guard radio or Weatheradio stations.
Technical Marine SynopsisIssued 8:00 PM ADT 4 August 2020 Tonight and Wednesday At 8:00 p.m. ADT tonight trough located on a line east-west over
the Avalon Peninsula.
By 3:00 a.m. ADT Wednesday departing trough located on a line
east-west over the southern Grand Banks.
At 3:00 a.m. ADT Wednesday Tropical Storm Isaias 996 mb located
at 45.4N 72.5W.
By 3:30 p.m. ADT Wednesday Tropical Storm Isaias 997 mb located
at 50.0N 70.7W.
At 8:00 p.m. ADT tonight ridge located on a line north-south over
By 8:00 p.m. ADT Wednesday ridge located on a line
northeast-southwest over the Grand Banks.
Marine Weather StatementIssued 7:47 PM ADT 4 August 2020 Tropical cyclone information statement.
At 6:00 P.M. ADT, tropical storm Isaias was located near 42.7 degrees
north and 74.2 degrees west, about 19 nautical miles west of Albany,
New York. Isaias has a minimum central pressure of 995 millibars and
maximum sustained winds of about 55 knots.
Isaias is currently moving north-northeastward at 35 knots, and is
expected to pass west of Maine tonight and into Southern Quebec early
Wednesday morning. Isaias could possibly bring marginal gales to
westernmost waters on Wednesday.
St. Lawrence - St. Lawrence River Area
- Anticosti - northern half
- Anticosti - southern half
- Beauport to L'Isle-aux-Coudres
- Browns Bank
- Chaleur - Miscou - eastern half
- Chaleur - Miscou - western half
- Cornwall to Montréal
- Donnacona to Beauport
- Grand Manan
- Gulf - Magdalen
- Kingston to Cornwall
- Lake Memphrémagog - northern half
- Lake Nipissing
- Lake Saint-Jean
- L'Isle-aux-Coudres to Tadoussac
- Montréal to Trois-Rivières
- Northumberland Strait
- Pointe à Michel to Pointe-des-Monts
- Pointe-des-Monts to Anticosti - northern half
- Pointe-des-Monts to Anticosti - southern half
- Richelieu River and Northern Lake Champlain
- Saguenay to Tadoussac
- Tadoussac to Pointe à Michel
- Trois-Rivières to Donnacona
- Arctic - Eastern Arctic
- Arctic - Western Arctic
- Atlantic - Labrador
- Atlantic - Maritimes
- Atlantic - Newfoundland
- Great Lakes - Lake Erie and Lake Ontario
- Great Lakes - Lake Huron
- Great Lakes - Lake Superior
What we are doing
- Date modified: