





Advisories / Alerts |
Severe Wx Summary! | ||||||
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Tue, Oct. 3, 2023-1:24:48am
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Tue, Oct 3, 2023 - 1:21am |
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Note: Beaufort cannot be entered because it would result in a range of numbers.

Force (Beaufort) |
Name |
Wind Speed knots mph |
Consequence | |
0 | Calm | 0 | 0 | Smoke rises vertically |
Wave height: 0 m - Sea: Like a mirror |
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1 | Light air | 1-3 | 1-3 | Smoke drifts with air |
Wave height: 0.1 m (.25 ft) - Sea: Ripples - No foam crests |
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2 | Light breeze | 4-6 | 4-7 | Weather vanes become active |
Wave height: 0.2-0.3 m (0.5-1 ft) - Sea: Small wavelets - Not breaking |
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3 | Gentle breeze | 7-10 | 8-12 | Leaves and small twigs move |
Wave height: 0.6-1 m (2-3 ft) - Sea: Small wavelets - Crests begin to break |
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4 | Moderate breeze | 11-16 | 13-18 | Small branches sway |
Wave height: 1-1.5 m - Sea: Small waves becoming longer, numerous whitecaps. |
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5 | Fresh breeze | 17-21 | 19-24 | Small trees sway - Waves break |
Wave height: 2-2.5 m (6-8 ft) - Sea: Moderate waves - Many whitecaps |
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6 | Strong breeze | 22-27 | 25-31 | Large branches sway |
Wave height: 3-4 m (9.5-13 ft) - Sea: Larger waves forming - Whitecaps everywhere |
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7 | Near gale | 28-33 | 32-38 | Whole trees sway - difficult to walk |
Wave height: 4-5.5 m (13.5-19 ft) - Sea: Sea heaps up - White foam blown around |
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8 | Gale | 34-40 | 39-46 | Twigs break off trees |
Wave height: 5.5-7.5 m (18-25 ft) - Sea: Edges of crests break into spindrifts |
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9 | Strong gale | 41-47 | 47-54 | Shingles blow off roofs |
Wave height: 7-10 m (23-32 ft) - Sea: High waves - Sea rolls - Reduced visibility |
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10 | Storm | 48-55 | 55-63 | Trees uprooted - Damage to buildings |
Wave height: 9-12.5 m (29-41 ft) - Sea: Very high waves with overhanging crests |
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11 | Violent Storm | 56-63 | 64-73 | Widespread damage |
Wave height: 11.5-16 m (37-52 ft) - Sea: Exceptionally high waves |
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12 | Hurricane | Over 63 | Over 73 | Violent destruction |
Wave height: 16+ m (52+ ft) - Sea: Sea completely white - Excessive foam |
Wind Speed Page Compliments of National Weather Service |
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