Weather Info

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Beaufort Wind Scale

Beaufort Number (FORCE) Wind Speed Wave Height (Ft) WMO* Description Effects Observed On the Sea Effects Observed On the Land
Knots MPH
0 Under 1 Under 1 Flat Calm Sea is like a mirror
1 1-3 1—3 0.25 Light Air Ripples with appearance of scales; no foam crests
2 4 –6 4 –7 0.5—1 Light Breeze Small wavelets; crests of glassy appearance, not breaking
3 7-10 8-12 2-3 Gentle Breeze Large wavelets; crests begin to break; scattered whitecaps
4 11-16 13-18 3.5-5 Moderate Breeze Small waves, becoming longer; numerous whitecaps
5 17-21 19-24 6-8 Fresh Breeze Moderate waves, taking longer form; many whitecaps; some spray
6 22-27 25-31 9.5-13 Strong Breeze Larger waves forming; whitecaps everywhere; more spray
7 28-33 32-38 13.5-19 Near Gale Sea heaps up; white foam from breaking waves begins to be blown in streaks
8 30-40 39-46 18-25 Gale Moderately high waves of greater length; edges of crests begin to break into spindrift; foam is blown in well-marked streaks
9 41-47 47-54 23-32 Strong Gale High waves; sea begins to roll; dense streaks of foam; spray may begin to reduce visibility
10 48-55 55-63 29-41 Storm Very high waves with overhanging crests; sea takes white appearance as foam is blown in very dense streaks; rolling is heavy and visibility is reduced
11 56-63 64-72 37-52 Violent Storm Exceptionally high waves; sea covered with white foam patches; visibility further reduced
12 64 and over 73 and over 45 and over Hurricane Air filled with foam; sea completely white with driving spray; visibility greatly reduced

Cloud Types and Altitude

Low clouds
Surface – 7,000 ft
Medium clouds
7,000 – 17,000 ft
High clouds
17,000 – 35,000 ft
Cumulus
Altocumulus
Cirrus
Cumulonimbus
Altostratus
Cirrostratus
Stratus
Nimbostratus
Cirrocumulus
Stratocumulus

 

Newquay Weather Station