* WHAT...Rough bar conditions expected. * WHERE...In the Main Channel of the Columbia River Bar. * WHEN...From 1 PM this afternoon to 2 AM PDT Thursday. * IMPACTS...Conditions will be hazardous to small craft, especially when operating near to, or attempting to cross, the Columbia River Bar. * ADDITIONAL DETAILS...Ebb current of 4.85 kt at 233 AM Wednesday. Seas 5 ft. Ebb current of 4.47 kt at 310 PM Wednesday. Seas 6 ft. Ebb current of 4.96 kt at 325 AM Thursday. Seas 6 to 7 ft.