* WHAT...For the first Small Craft Advisory, seas 2 to 5 ft expected. For the second Small Craft Advisory, northeast winds 20 to 25 kt with gusts up to around 30 kt and seas 4 to 7 ft expected. * WHERE...Casco Bay. * WHEN...For the first Small Craft Advisory, from 8 PM this evening to 8 AM EDT Friday. For the second Small Craft Advisory, from 2 AM Saturday to 8 PM EDT Sunday. * IMPACTS...Conditions will be hazardous to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.