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Channel Island Buoy data

Caribbean Hurricane Watch Network

Hot, humid air "feels" hotter than hot, dry air because the extara
moisture in the air slows the evaporation of sweat from our skins.
Evaporation of water always produces a cooling effect, since the extra
energy needed to convert water from liquid to gaseous water vapor is taken
from the air, thus reducing the temperature of the air.

HEAT INDEX:  An index that combines air temperature and moisture to give
an apparent temperature (how hot it "feels"). 

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Table of Heat index as a function of Temperature and Dew Point
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Temp          Dew Point(F)
 (F)     50.0  55.0  60.0  65.0  70.0  75.0  80.0  85.0 
--------------------------------------------------------
  65:    62.7  63.8  65.0  66.6                         
  70:    67.8  68.7  69.8  71.1  72.6                   
  75:    73.1  73.9  74.8  75.9  79.2  80.7            
  80:    79.8  80.6  81.6  82.8  84.4  86.9  90.9       
  85:    83.5  84.7  86.1  88.0  90.5  94.0  99.0 106.6 
  90:    87.9  89.4  91.2  93.6  96.9 101.2 107.2 115.6 
  95:    92.9  94.5  96.7  99.6 103.4 108.4 115.2 124.3 
 100:    98.1  99.9 102.4 105.6 109.8 115.3 122.7 132.3 
 105:   103.4 105.4 108.1 111.6 116.1 122.0 129.7 139.7 
 110:   108.7 110.9 113.8 117.5 122.3 128.4 136.3 146.5