* WHAT...Southwest winds 15 to 20 kt with frequent gusts up to 30 kt and seas 8 to 12 feet.
* WHERE...Coastal Waters of Guam, Rota, Tinian and Saipan.
* WHEN...Until 5 PM ChST Tuesday.
* IMPACTS...Conditions will be hazardous to small craft.
* ADDITIONAL DETAILS...A monsoon surge flowing into Typhoon Choi-wan will maintain moderate to fresh winds with near-gale gusts.