Beaufort scale / Beaufort Skala / Beaufortova lestvica



Beaufort scaleEnglishGermanSlovene
Beaufort scale 0CalmWindstillebrezvetrje
Beaufort scale 1Light airleichter Zugsapica
Beaufort scale 2Light breezeleichte Brisevetrič
Beaufort scale 3Gentle breezeschwache Brisešibki veter
Beaufort scale 4Moderate breezemäßige Brisezmerni veter
Beaufort scale 5Fresh breezefrische Brisemočni veter
Beaufort scale 6Strong breezestarker Windhudi veter
Beaufort scale 7Near galesteifer Windviharni veter
Beaufort scale 8Galestürmischer Windvihar
Beaufort scale 9Strong galeSturmmočni vihar
Beaufort scale 10Stormschwerer Sturmhudi vihar
Beaufort scale 11Violent stormorkanartiger Sturmorkanski vihar
Beaufort scale 12HurricaneOrkanorkan

Wind Speed Wave height
B.S.Description(km/h)(mph)(knots) (m/s)(m) (ft)Sea conditionsLand conditions
0Calm1 11 0.30 0Sea like a mirrorCalm. Smoke rises vertically.
1Light air1.1–5.51–41–4 0.3–1.5 0–0.2 0–1Ripples with the appearance of scales are formed, but without foam crestsSmoke drift indicates wind direction and wind vanes cease moving.
2Light breeze5.6–114–74–6 1.6–3.4 0.2–0.5 1–2Small wavelets, still short but more pronounced; crests have a glassy appearance and do not breakWind felt on exposed skin. Leaves rustle and wind vanes begin to move.
3Gentle breeze12–198–127–10 3.4–5.4 0.5–1 2–3.5Large wavelet; crests begin to break; foam of glossy appearance; perhaps scattered white horsesLeaves and small twigs constantly moving, light flags extended.
4Moderate breeze20–2813–1811–16 5.5–7.9 1–23.5–6Small waves, becoming longer; fairly frequent white horsesDust and loose paper raised. Small branches begin to move.
5Fresh breeze29–3819–2417–21 8.0–10.7 2–36–9Moderate waves, taking a more pronounced long form; many white horses are formed (chance of some spray)Branches of a moderate size move. Small trees in leaf begin to sway.
6Strong breeze39–4925–3122–27 10.8–13.8 3–49–13Large waves begin to form; the white foam crests are more extensive everywhere (probably some spray)Large branches in motion. Whistling heard in overhead wires. Umbrella use becomes difficult. Empty plastic garbage cans tip over.
7Near gale50–6132–3827–33 4–5.5 13–19Sea heaps up and white foam from breaking waves begins to be blown in streaks along the direction of the windWhole trees in motion. Effort needed to walk against the wind.
8Gale39–4634–40 9–12.5 29–41Moderately high waves of greater length; edges of crests begin to break into the spin drift; the foam is blown in well-marked streaks along the direction of the windSome twigs broken from trees. Cars veer on road. Progress on foot is seriously impeded.
9Strong gale75–8847–5441–47 20.8–24.4 High waves; dense streaks of foam along the direction of the wind; crests of waves begin to topple, tumble, and roll over; spray may affect visibilitySome branches break off trees, and some small trees blow over. Construction/temporary signs and barricades blow over.
10Storm89–10255–6348 – 55 24.5–28.4 11.5–16 37–52Very high waves with long overhanging crests; the resulting foam, in great patches, is blown in dense white steaks along the direction of the wind; on the whole, the surface of the sea takes a white appearance; the tumbling of the sea becomes heavy and shock-like; visibility affectedTrees are broken off or uprooted, saplings bent and deformed. Poorly attached asphalt shingles and shingles in poor condition peel off roofs.
11Violent storm103–11764–7256–63 28.5–32.6 14Exceptionally high waves (small- and medium-sized ships might be for a time lost to view behind the waves); the sea is completely covered with long white patches of foam lying along the direction of the wind; everywhere the edges of the wave crests are blown into froth; visibility affectedVery widespread damage to vegetation. Some windows may break; mobile homes and poorly constructed sheds and barns are damaged. Debris may be hurled about.
12Hurricane118 73 64 The air is filled with foam and spray; sea completely white with driving spray; visibility very seriously affected