Hurricane Intensity Scale

(Saffir-Simpson Scale)

  Maximum Sustained Winds Barometric Pressure Storm Surge Damage
Type KNOTS MPH millibars inches of mercury Feet Meters  
Depression less than 34 less than 39 ------ ------ ------ ------ ------
Tropical Storm 35 - 63 39 - 73 ------ ------ ------ ------ ------
Category 1 64 - 82 74 - 95 greater than 980 greater than 28.94 3 - 5 1.0 - 1.7 minimal
Category 2 83 - 95 96 - 110 979 - 965 28.50 - 28.91 6 - 8 1.8 - 2.6 moderate
Category 3 96 - 113 111 - 130 964 - 945 27.91 - 28.47 9 - 12 2.7 - 3.8 extensive
Category 4 114 - 135 131 - 155 944 - 920 27.17 - 27.88 13 - 18 3.9 - 5.6 extreme
Category 5 136+ 156+ less than 920 less than 27.17 19+ 5.7+ catastrophic

NOTE:
The Saffir-Simpson Scale provides an indication of a hurricanes strength based primarily on wind speed.  Other factors such as flooding can be extremely dangerous.

Listen to information provided by your local Weather Service office or Emergency Management Officials.
 

Copyright 2008-11        WB4OEQ