Borders Cuts Forecast; Storms Hit Sales  SAN FRANCISCO (Reuters) - Bookseller Borders Group Inc.  &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=BGP.N target=/stocks/quickinfo/fullquote"&gt;BGP.N&lt;/A&gt; on Tuesday slashed its financial forecast, saying sales  were weaker than expected due in part to hurricanes, and that  profits during the key holiday season would miss Wall Street  estimates.