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Secrets of the St. Lawrence
Sailors take warning - White-outs
Sailors take warning (PDF; 2.41 MB)
- "Oh, no! Not fog! All our careful planning for nothing. The locals were right in saying we might well be completely blanketed in cloud this morning, after that lovely warm yesterday!"
In summer, on the St Lawrence, you may sometimes run into persistent fog so thick you could cut it with a knife.
Sailing in such conditions is very difficult, unless you have radar. A ship might well be lurking behind each fog bank.
Three types of fog
The worst type of fog, because it is the most persistent, is created by cold waters and warm, moist wind from the South. It will remain until it is blown off by a dry wind from another direction - Advection fog.
The fog that appears on rainy days with light winds may be just as dense. Once the rain stops, a Southwesterly or Westerly wind should follow and sweep it away - Frontal fog.
The third type of fog forms along the shore on a clear night but doesn't last long. The land breeze will carry it a short distance offshore. The morning sun will generally dissipate it - Radiation fog.
Because of their particularly cold waters, the Tadoussac, Pointedes- Monts, Havre-Saint-Pierre and Strait of Belle Isle areas are especially prone to fog.
- 1. Fore to aft
- 2. What Cartier missed out on
- 3. Conversion
- 4. The Secrets of the St Lawrence
- 5. The wind in your sails - Hard a-port!
- 6. The wind in your sails - Fast or slow?
- 7. The wind in your sails - The wind's paths
- 8. The wind in your sails - Against the wall
- 9. The wind in your sails - Solar energy
- 10. The wind in your sails - Under the stars
- 11. The wind and the waves - The windway
- 12. The wind and the waves - Wave wars
- 13. The wind and the waves - Graveyards
- 14. The wind and the waves - Conflicting seas
- 15. Symbols
- 16. The St Lawrence, from 1 to... - Legend
- 17. The St Lawrence, from 1 to... - Calling all sailors
- 18. The St Lawrence, from 1 to... Hot spots
- 19. Local listings - Québec - Pointe-des-Monts
- 20. Local listings - Pointe-des-Monts - Cap Whittle
- 21. Local listings - Cap Whittle - Blanc-Sablon
- 22. Local listings - Gaspésie - Baie des Chaleurs
- 23. Local listings - Îles de la Madeleine
- 24. Sailors take warning - White-outs
- 25. Sailors take warning - The sky above us
- 26. Sailors take warning - Keeping a weather eye
- 27. Sailors take warning - Fair weather and foul
- 28. Sailors take warning - The unexpected
- 29. The four seasons - Wind aplenty
- 30. The four seasons - Vessel icing
- 31. The four seasons - Ice cycle
- 32. Extra - Beaufort
- 33. Extra - Handy references
- 34. Extra - Old Salts and Sea-dogs
- 35. Extra - The crew
- 36. Extra - A to Z
- 37. Extra - Stations
- 38. Extra - Areas
- 39. Credits
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