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HEAT

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NAME

heat - Heat index computation program

SYNOPSIS

heat [parameters] [temp dewpoint]

PARAMETERS

Command Line Resource Default Description
-h help No Lists basic help information.
-df=filename default .wxpdef Sets the name of the resource file.
-na=name name heat Specifies the name used in resource file parsing.
-ba batch No Run program in batch mode
-me=level message out2 Specifies level of messages to be displayed
  • output values - print
  • value labels - mess
  • table -out1
-ta table none Specifies to print out a table.  This is the default if temperature and speed aren't prespecified.
-pa=parameter parameter none Specifies additional parameters:
  • heat - display heat index
  • thi - display temperature humidity index
  • dew - use temperature and dewpoint
  • rh - use temperature and relative humidity
temp
dewpoint
value none
User prompt
Specifies the temperature in F.
Specifies the dewpoint in F (use relative humidity when rh parameter set).

DESCRIPTION

The heat index program calculates the heat index from the specified temperature and dewpoint. If temp and dewpoint are not specified, the program first displays a heat index chart and then prompts the user for a temperature value in F and an associated dewpoint in F. From this information, the heat index is calculated. The heat index is relatively meaningless for temperatures less than 65F, since the skin loses more heat than it produces below this temperature. Also, the heat index is meaningless for dewpoints less than 65F, since the drier air leads to evaporative cooling of the skin's surface. A second index called the temperature-humidity index is calculated for comparison and a textual heat stress condition such as normal, low, medium, high or extreme is displayed. For example:

heat 90 70
Temperature (F):  90.0
Dewpoint (F):  70.0
Heat Index (F):  95.4
Temperature-Humidity Index (F):  81.0   High

Or to plot a table:

heat -table
      HEAT INDEX CALCULATION (Ver 5.0B25-WIN32)

           Heat Index
          Dew Point(F)
      50.0  55.0  60.0  65.0  70.0  75.0  80.0  85.0
Temperature(F)
  65: 60.8  62.0  63.3  64.8
  70: 70.5  71.4  72.5  73.8  75.3
  75: 75.7  76.3  76.8  77.2  77.8  79.3
  80: 78.3  79.2  80.2  81.4  83.0  85.5  89.5
  85: 82.0  83.2  84.7  86.6  89.1  92.5  97.6 105.2
  90: 86.5  87.9  89.8  92.2  95.4  99.8 105.8 114.2
  95: 91.4  93.1  95.3  98.1 101.9 107.0 113.7 122.9
 100: 96.6  98.5 101.0 104.2 108.4 113.9 121.2 130.9
 105:101.9 104.0 106.7 110.2 114.7 120.6 128.3 138.3
 110:107.2 109.5 112.4 116.1 120.9 127.0 134.9 145.1
 115:112.4 114.8 117.9 121.8 126.8 133.1 141.2 151.4
 120:117.4 120.0 123.2 127.3 132.4 138.9 147.0 157.3

FILES

SEE ALSO


For further information about WXP, email technical-support@weather.unisys.com
Last updated by Dan Vietor on Aug 29, 1997