* WHAT...For the Dense Fog Advisory, dense fog will reduce visibility to 1 NM or less. For the Small Craft Advisory, rough bar conditions expected. Seas 4 to 5 ft at 11 seconds and north winds 15 to 20 kt with gusts up to 25 kt expected.
* WHERE...In the Main Channel of the Columbia River Bar.
* WHEN...Dense Fog Advisory, until noon PDT Tuesday. Small Craft Advisory, from 5 PM Tuesday to 2 AM PDT Wednesday.
* IMPACTS...Conditions will be hazardous to small craft, especially when operating near to, or attempting to cross, the Columbia River Bar. Low visibility will make navigation difficult.
* ADDITIONAL DETAILS...Ebb current of 4.85 kt at 233 AM Wednesday. Seas 5 ft.