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diff --git a/src/weather.py b/src/weather.py
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+#!/usr/bin/env python3
+
+# Copyright © 2014 Mattias Andrée (maandree@member.fsf.org)
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+from subprocess import Popen, PIPE
+
+
+def weather(station):
+ '''
+ Get a brief weather report
+
+ @param station:str The station's International Civil Aviation Organization airport code
+ @return :(sky:str, visiblity:(:int, :float)?, weather:list<str>)
+ The sky condition, visiblity and weather. Sky condition values include
+ ‘clear’, ‘mostly clear’, ‘overcast’, ‘partly cloudy’, ‘mostly cloudy’
+ and ‘obscured’. The visibility consists of two parameters: the first
+ on indicates the the visiblity is a upper bound if the value is -1,
+ a lower bound if +1, and approximate if 0; the second parameter is the
+ visibility in kilometers. If the visibility is unknown the value will
+ be `None`. The weather is a list that can, and often is, empty.
+ '''
+ url = 'http://weather.noaa.gov/pub/data/observations/metar/decoded/%s.TXT'
+ url %= station.upper()
+ proc = Popen(['wget', url, '-O', '-'], stdout = PIPE, stderr = PIPE)
+ output = proc.communicate()[0]
+ if not proc.returncode == 0:
+ return None
+ output = output.decode('utf-8', 'replace').split('\n')
+ output = [line.lower().split(': ') for line in output if ': ' in line]
+ output = dict([(line[0], ': '.join(line[1:])) for line in output])
+ sky_conditions = 'clear' if 'sky conditions' not in output else output['sky conditions']
+ visibility = None
+ try:
+ if 'visibility' in output:
+ visibility = output['visibility'].split(':')[0]
+ visibility = visibility.replace(' mile(s)', '')
+ visibility = visibility.replace(' miles', '')
+ visibility = visibility.replace(' mile', '')
+ visibility_eq = 0
+ if visibility.startswith('greater than '):
+ visibility_eq = 1
+ visibility = visibility[len('greater than '):]
+ if visibility.startswith('less than '):
+ visibility_eq = -1
+ visibility = visibility[len('less than '):]
+ if len(list(filter(lambda c : not (('0' <= c <= '9') or (c in ' /')), visibility))) == 0:
+ visibility = sum([eval(v) for v in visibility.split(' ')])
+ visibility = (visibility_eq, visibility * 1.609)
+ else:
+ visibility = None
+ except:
+ visibility = None
+ weather = '' if 'weather' not in output else output['weather']
+ weather = weather.replace(',', ';').replace(' with ', ';')
+ weather = weather.replace(' in the vicinity', '')
+ weather = weather.replace(' observed', '')
+ weather = weather.replace(' during the past hour', '')
+ weather = [w.replace(';', '').strip() for w in weather.split(';') if not w == '']
+ return (sky_conditions, visibility, weather)
+