* WHAT...Seas 8 to 10 feet expected.
* WHERE...Guam and Rota Coastal Waters.
* WHEN...From 2 AM Friday to 4 PM ChST Saturday.
* IMPACTS...Conditions will be hazardous to small craft.
* ADDITIONAL DETAILS...As Typhoon In-fa continues to approach the northern CNMI, seas are expected to quickly build to around 10 feet over Guam and Rota waters. The large, long-period swell will slowly shift from northeast to northwest through Saturday.