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The Saffir-Simpson Scale

Cat.	Wind Speed	Barometric Pressure	Storm Surge	Damage Potential
1 (weak)	75–95 mph 65–82 kts 33–42 m/s	> 28.94 in. Hg > 980.0 mb > 97.7 kPa	4.0–5.0 ft. 1.2–1.5 m	minimal damage to vegetation
2 (moderate)	96–110 mph 83–95 kts 43–49 m/s	28.50–28.93 in. Hg 965.1–979.7 mb 96.2–97.7 kPa	6.0–8.0 ft. 1.8–2.4 m	moderate damage to houses
3 (strong)	111–130 mph 96–113 kts 50–58 m/s	27.91–28.49 in. Hg 945.1–964.8 mb 96.2–97.7 kPa	9.0–12.0 ft. 2.7–3.7 m	extensive damage to small buildings
4 (very strong)	131–155 mph 114–135 kts 59–69 m/s	27.17–27.90 in. Hg 920.1–944.8 mb 91.7–94.2 kPa	13.0–18.0 ft. 3.9–5.5 m	extreme structural damage
5 (dev-astating)	> 155 mph > 135 kts > 70 m/s	< 27.17 in Hg < 920.1 mb < 91.7 kPa	> 18.0 ft > 5.5 m	catastrophic building failures possible

Additional Links

National Hurricane Center
Weather Underground
Stormpulse
Navy Hurricane Storm Page
Intellicast
NOAA Coastal Services Center
Weather.com
Mike's Weather Page (spaghettimodels.com)

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