From: Rich.Powell@bbs.mhv.net (Rich Powell)
Newsgroups: rec.running
Subject: Re: When is it too hot to run?
Date: 3 Jul 1995 02:50:31 GMT

 
                THE HEAT INDEX FOR NON METRICS...
Relative            Enviromental temperatture (F)
Humidity(%)  70  75  80  85  90  95  100  105  110  115  120
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
        0%   64  69  73  78  83  87  91   95   99   103  107
        10%  65  70  75  80  85  90  95   100  105  111  116
        20%  66  72  77  82  87  93  99   105  112  120  130
        30%  67  73  78  84  90  96  104  113  123  135  148
        40%  68  74  79  86  93  101 110  123  137  151
        50%  69  75  81  88  96  107 120  135  150
        60%  70  76  82  90  100 114 132  149
        70%  70  77  85  93  106 124 144
        80%  71  78  86  97  113 136
        90%  71  79  88  102 122
       100%  72  80  91  108
 
An apparent temperature of:
        90-104          Heat cramps or heat exhaustion possible
       105-130          Heat cramps or heat exhaustion likely,
                        heatstroke possible
       130-AZ           Heatstroke highly likely
 
Note: Combined heat index of heat and humidity, what it "feels like"

      Exposure to full sunshine can increase values by up to 15F