Severe Windstorm Checklist - FM Global
Severe Windstorm Checklist - FM Global
Severe Windstorm Checklist - FM Global
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<strong>Severe</strong> <strong>Windstorm</strong> <strong>Checklist</strong><br />
After the <strong>Windstorm</strong> (continued)<br />
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Typhoon Categories<br />
(Differs from country to country)<br />
HONG KONG<br />
TAIWAN<br />
JAPAN<br />
Category<br />
1<br />
2<br />
3<br />
Typhoon Strength<br />
Tropical Storm<br />
Light<br />
Medium<br />
Strong<br />
Super<br />
Scale<br />
Very Small<br />
Small<br />
Medium<br />
Large<br />
Extra Large<br />
Minimum Central Sea Level Pressure<br />
990 mb or less<br />
950 mb or less<br />
920 mb or less<br />
Maximum Wind Speed at Center<br />
Below 38 mph (17.2 m/s)<br />
39 to 73 mph (17.2 to 32.6 m/s)<br />
73 to 114 mph (32.7 to 50.9 m/s)<br />
Above 114 mph (51 m/s)<br />
Above 150 mph (67 m/s)<br />
Size of diameter (area) where wind<br />
velocity is more than 49.2 ft/s (15 m/s)<br />
Radius less than 124 mi (200 km)<br />
Radius less than 124 and 186 mi (200 and 300 km)<br />
Radius less than 187 and 311 mi (301 and 500 km)<br />
Radius less than 312 and 497 mi (501 and 800 km)<br />
Radius more than 497 mi (800 km)<br />
6<br />
Strength<br />
Weak<br />
Ordinary Strength<br />
Strong<br />
Very Strong<br />
Extremely Strong<br />
Maximum Wind<br />
Velocity<br />
38 to 56 mph (17 to 25 m/s)<br />
57 to 74 mph (25 to 33 m/s)<br />
75 to 98 mph (34 to 44 m/s)<br />
99 to 121 mph (45 to 54 m/s)<br />
Above 121 mph (54 m/s)
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