Zend_Feed::registerNamespace('yweather','http://xml.weather.yahoo.com/ns/rss/1.0');
$feed = Zend_Feed::import('http://xml.weather.yahoo.com/forecastrss?p=EIXX0014&u=c');

$condition = $feed->current()->{'yweather:condition'};
$text = $condition->getDOM()->getAttribute('text');
var_dump($text);