EM 1110-2-1100 (Change 1)
31 Jul 03
Table A-1
Beaufort Wind Scale
1
Beaufort
Wind Speed
WMO Description
Number
(knots)
0
<1
Calm
1
1-3
Light air
2
4-6
Light breeze
3
7 - 10
Gentle breeze
4
11 - 16
Moderate breeze
5
17 - 21
Fresh breeze
6
22 - 27
Strong breeze
7
28 - 33
Near gale
8
34 - 40
Gale
9
41 - 47
Strong Gale
10
48 - 55
Storm
11
56 - 63
Violent storm
$ 64
12
Hurricane
1
World Meteorological Organization, from
http://www.crh.noaa.gov/lot/webpage/beaufort/ (28 Aug.
2001)
BEACH WIDTH
The horizontal dimension of the beach measured normal to the shoreline and landward of the higher-high tide line
(on oceanic coasts) or from the still water level (on lake coasts)
BEAUFORT SCALE
Classification of the force of the winds in accordance with a scale established by Rear-Admiral, Sir Francis
Beaufort in which the range of intensity varies in integers from 0 to 12, with a description of the state and behavior of a "well-
conditioned man-of-war."
BED
The bottom of a watercourse, or any body of water.
BED FORMS
Any deviation from a flat bed that is readily detectable by eye and higher than the largest sediment size present in
the parent bed material; generated on the bed of an alluvial channel by the flow.
A-8
Appendix A Glossary of Coastal Terminology
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