in reply to Regex help
While not a direct answer to your question, this looks like aviation weather data (KATL being Atlanta Intl.). There's a large number of weather modules available on CPAN that may ease your work.
Since this MOS forecast data seems a bit different from what I tend to use (METAR), I don't know a module name by heart.
If you couldn't find a suitable module either or just prefer to use RE's, the other posters' answers are a better option, I suppose.
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