Storms Soak Retailers' September Sales  NEW YORK (Reuters) - Top U.S. retailers, including Wal-Mart  Stores Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=WMT.N target=/stocks/quickinfo/fullquote"&gt;WMT.N&lt;/A&gt;, reported lackluster September sales on  Thursday as warm weather and the string of hurricanes that  battered the East Coast dampened buying.