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September 1999 - August 2003

Torresen Marine, Inc.
3126 Lake Shore Drive
Muskegon, Michigan 49441
231-759-8596
231-755-1522 fax
info@torresen.com

Copyright 2001-2004
All Rights Reserved

Beufort Wind Scale
Beaufort
Number
Wind
(knots)
Desriptive
Term
Land Observations Sea Observations
0 <1 Calm Calm, smoke rises vertically Water calm, mirrorlike (.25 ft. waves)
1 1-3 Light air Wind direction shown by smoke but not by windvanes Ripples with the appearance of scales (.5 to 1 ft. waves)
2 4-6 Light breeze Leaves rustle; wind felt on face; windvanes moved by wind Small wavelets on water; crests have a glassy appearance and do not break.
2-3 ft.
3 7-10 Gentle breeze Leaves and twigs in constant motion; wind extends light flag Large wavelets; crests begin to break; maybe scattered whitecaps. 3.5 to 5 ft.
4 11-16 Moderate breeze Wind raises dust and loose paper; small branches move Moderate waves; fairly frequent whitecaps 6 to 8 ft.
5 17-21 Fresh breeze Small leafed trees begin to sway Moderate, longer waves; many whitecaps; chance of spray. 9.5 to 13 ft.
6 22-27 Strong breeze Large branches in motion; phone lines whistle Large waves form; white foam crests everywhere; probable spray. 13.5 to 19 ft.
7 28-33 Moderate gale Whole trees in motion; difficult to walk against wind Sea heaps up; white foam starts to blow in streaks.  18 to 25 ft.
8 34-40 Fresh gale Wind breaks twigs off trees; walking impeded Moderately high waves with crests beginning to break into foam that's blown in white streaks.  23 to 32 ft.
9 41-47 Strong gale Slight damage to buildings occurs; shingles torn off roofs High waves; rolling seas; dense streaks of foam; wave crests begin to topple, tumble and fall over.  29-41 ft.
10 48-55 Whole gale Trees uprooted; considerable structural damage to buildings High waves with overhanging crests; sea is white.  64-72 ft.
11-17 56+ Storm, Hurricane Widespread damage Huge waves; air filled with spray; little visibility
73 ft. +

Torresen Marine, Inc.
3003 Lake Shore Drive - Muskegon, Michigan 49441 - 231-759-8596 - 231-755-1522 (FAX)