weather symbol plot

Hi-
I am attempting to plot up some surface observations on a map. I have a ascii text file of these hourly surface observations for 1 month (800,000 observations).
I am trying to follow the example under the wmstnm built-in function example.

Is there any simple way to take my integer wind speed, direction, temperature, and dew point temperature data and turn it into the correct character format?
It looks to me like I need to write some fortran code to convert the integers into the specified character array. Has anyone already done this?

Or is there a better way to construct the imdat array in the example?

Thanks
jimmyc
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Received on Sun Feb 7 22:36:23 2010