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WCHILL

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NAME

wchill - Wind chill computation program

SYNOPSIS

wchill [parameters] [temp speed]

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 wchill 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:
  • wcval - wind chill value (cals)
  • wctemp - wind chill temp (F)
temp
speed
value none
User prompt
Specifies the temperature in F
Specifies the wind speed in knts

DESCRIPTION

The wind chill program calculates the wind chill factor from a specified temperature and wind speed. If temp and wind are not specified, the program displays a wind chill chart for reference and then prompts the user for a temperature value in F and an associated wind speed in knots. From this input data, the wind chill factor is calculated. The wind chill factor is relatively meaningless for a temperature greater than 50 F because the wind cools the skin's surface less for warmer temperatures. Also, the wind chill factor changes little for wind speeds greater than 40 knots because at that speed, the wind removes nearly all heat produced at the skin's surface. For example:

wchill 40 20
16.2

or to print a wind chill table:

wchill -table
Wind Chill
          Temperature(F)
      40   35   30   25   20   15   10    5    0   -5  -10  -15  -20  -25  -30
Wind(knots)
  5:  36   30   25   19   14    8    3   -2   -8  -13  -19  -24  -30  -35  -40
 10:  26   20   13    7    1   -6  -12  -18  -25  -31  -37  -44  -50  -56  -63
 15:  20   13    6   -1   -7  -14  -21  -28  -35  -42  -49  -56  -63  -70  -77
 20:  16    9    2   -6  -13  -20  -28  -35  -42  -50  -57  -64  -72  -79  -86
 25:  13    6   -2   -9  -17  -25  -32  -40  -47  -55  -63  -70  -78  -85  -93
 30:  11    4   -4  -12  -20  -28  -35  -43  -51  -59  -66  -74  -82  -90  -98
 35:  10    2   -6  -14  -22  -30  -37  -45  -53  -61  -69  -77  -85  -93 -101
 40:   9    1   -7  -15  -23  -31  -39  -47  -55  -63  -71  -79  -87  -95 -103

FILES

SEE ALSO


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