Storm tracker: Hurricane Kirk is strengthening and forecast to grow larger, NHC says USA TODAYUncertainty surrounds tropical system working to develop in Caribbean WFTV OrlandoFlorida on long-range alert for upcoming Gulf tropical threat AccuWeatherKirk becomes a hurricane; expected to reach major hurricane strength this week Yahoo! VoicesKirk set to become a major hurricane, plus tracking development in the Gulf by the weekend WJCL News Savannah