Basically dumping a year's worth of rain within a day, for the area. http://earthobservatory.nasa.gov/NaturalHazards/view.php?id=82377&eocn=home&eoci=nh
Yep, apparently this hit Saudi Arabia pretty hard as well: http://www.businessinsider.com/ridayh-rain-floods-city-2013-11 <blockquote class="twitter-tweet"><p>Riyadh is now like the sea due to rain <a href="http://t.co/KA7GjpZe78">pic.twitter.com/KA7GjpZe78</a></p>— Bdoor Al-Qarni (@g_bdoor) <a href="https://twitter.com/g_bdoor/statuses/401805300581146625">November 16, 2013</a></blockquote> <script async src="//platform.twitter.com/widgets.js" charset="utf-8"></script>