* WHAT...Southwest winds 15 to 25 knots with gusts up to 30 knots and waves 4 to 7 feet.
* WHERE...Grand Haven to Manistee.
* WHEN...Until 7 PM EST Thursday.
* IMPACTS...Conditions will be hazardous to small craft.
* ADDITIONAL DETAILS...A brief period of isolated gales is possible north of Whitehall Thursday night. Small Craft Advisory conditions will likely continue into Friday night.