Hurricane Information Links – WhaleNet

Hurricane Intensity

Category Pressure
mb
Winds
mph
Surge
ft
Depression <39
Storm 39-73
Hurricane 1 > 980 74-95 4-5
Hurricane 2 965-980 96-110 6-8
Hurricane 3 945-965 111-130 9-12
Hurricane 4 920-945 131-155 13-18
Hurricane 5 < 920 > 155 > 18

Beaufort Scale of Wind Force and Its Probable Wave Height

Beaufort
number
Description term Wind speeds Wave height (m)
Wind Wave knots m/s probable maximum
0 Calm < 1 0 – 0.2
1 Light air Ripples 1 – 3 0.3 – 1.5 0.1 0.1
2 Light breeze Small wavelets 4 – 6 1.6 – 3.3 0.2 0.3
3 Gentle breeze Large wavelets 7 – 10 3.4 – 5.4 0.6 1.0
4 Moderate breeze Small waves 11 – 16 5.5 – 7.9 1.0 1.5
5 Fresh breeze Moderate waves 17 – 21 8.0 – 10.7 2.0 2.5
6 Strong breeze Large waves 22 – 27 10.8 – 13.8 3.0 4.0
7 Near gale Large waves 28 – 33 13.9 – 17.1 4.0 5.5
8 Gale Moderately high waves 34 – 40 17.2 – 20.7 6.0 7.5
9 Strong gale High waves 41 – 47 20.8 – 24.4 7.0 10.0
10 Storm Very high waves 48 – 55 24.5 – 28.4 9.0 12.5
11 Violent storm Exceptionally high waves 56 – 63 28.5 – 32.6 11.5 16.0
12 Hurricane Exceptionally high waves 64 – 71 32.7 – 36.9 14.0 > 16
13 Hurricane Exceptionally high waves 72 – 80 37.0 – 41.4 > 14 > 16
14 Hurricane Exceptionally high waves 81 – 89 41.5 – 46.1 > 14 > 16
15 Hurricane Exceptionally high waves 90 – 99 46.2 – 50.9 > 14 > 16
16 Hurricane Exceptionally high waves 100 – 109 51.0 – 56.0 > 14 > 16
17 Hurricane Exceptionally high waves 109 – 118 56.1 – 61.2 > 14 > 16

Wave Height Estimates

Wave Height Estimates

Beaufort Scale links

https://www.spc.noaa.gov/faq/tornado/beaufort.html