A rainfall alert script for hubot-slack. It posts alerts on slack 30 minutes before it starts/stops raining (currently this script only supports locations in Japan).

Japanese description available on Qiita: http://qiita.com/takashyx/items/ccd5ccab7007d43f1355
npm: https://www.npmjs.com/package/hubot-slack-rainfall-alert
github: https://github.com/takashyx/hubot-slack-rainfall-alert