From the National Weather Service:
URGENT - WEATHER MESSAGE National Weather Service Boston/Norton MA 905 PM EDT Sun Apr 14 2019 MAZ020>024-RIZ004>008-150915- /O.NEW.KBOX.FG.Y.0005.190415T0105Z-190415T1000Z/ Southern Bristol MA-Southern Plymouth MA-Barnstable MA-Dukes MA- Nantucket MA-Eastern Kent RI-Bristol RI-Washington RI-Newport RI- Block Island RI- Including the cities of Fall River, New Bedford, Mattapoisett, Chatham, Falmouth, Provincetown, Vineyard Haven, Nantucket, East Greenwich, Warwick, West Warwick, Bristol, Narragansett, Westerly, Newport, and New Shoreham 905 PM EDT Sun Apr 14 2019 ...DENSE FOG ADVISORY IN EFFECT UNTIL 6 AM EDT MONDAY... The National Weather Service in Boston/Norton has issued a Dense Fog Advisory, which is in effect until 6 AM EDT Monday. * VISIBILITIES...One quarter mile or less at times. * TIMING...Through 6 am Monday morning. * IMPACTS...Limited visibilities will make travel very difficult. * LOCATION...The south coasts of both Massachusetts and Rhode Island. This also includes Cape Cod and the Islands. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Dense Fog Advisory means visibilities will frequently be reduced to less than one quarter mile, for at least 3 hours. If driving, slow down, use your headlights, and leave plenty of distance ahead of you.