#! /opt/local/bin/ruby
require 'wx/metar'
require 'open-uri'

def usage
  $stderr.puts "usage: #{$0} <station>"
  exit 1
end
usage if ARGV.empty? or ARGV[0] =~ /^-h/i

u = "ftp://tgftp.nws.noaa.gov/data/observations/metar/stations/#{ARGV[0].upcase}.TXT"
raw = `wget -q -O - #{u}`
usage if raw == nil or raw == ''
raw = raw.split("\n")[1] # don't know why open-uri doesn't work
puts WX::METAR.parse(raw).to_s