* WHAT. Dense fog will reduce visibility to less than 1 NM. * WHERE. New York Harbor, including Raritan Bay and Sandy Hook Bay. * WHEN. Until 10 AM EDT Monday. * IMPACTS. Low visibility will make navigation difficult.

* WHAT. Visibility one quarter mile or less in dense fog. * WHERE. In Connecticut, Southern Fairfield, Southern Middlesex, Southern New Haven, and Southern New London Counties. In New York, Northeast Suffolk, Northern Nassau, Northwest Suffolk, Southeast Suffolk, Southern Nassau, and Southwest Suffolk Counties. * WHEN. Until 9 AM EDT Monday. * IMPACTS. Low visibility could make driving conditions hazardous.

* WHAT. Dense fog will reduce visibility to 1 NM or less. * WHERE. Long Island Sound, and Peconic and Gardiners Bays. * WHEN. Until 10 AM EDT Monday. * IMPACTS. Low visibility will make navigation difficult.

* WHAT. Dense fog will reduce visibility to 1 NM or less. * WHERE. Sandy Hook NJ to Montauk Point NY out 20 nm, New York Harbor, and South Shore Bays from Jones Inlet through Shinnecock Bay. * WHEN. Until 10 AM EDT Monday. * IMPACTS. Low visibility will make navigation difficult.

* WHAT. Visibility one quarter mile or less in dense fog. * WHERE. In Connecticut, Southern Fairfield, Southern Middlesex, Southern New Haven, and Southern New London Counties. In New York, Northeast Suffolk, Northern Nassau, Northwest Suffolk, Southeast Suffolk, Southern Nassau, and Southwest Suffolk Counties. * WHEN. Until 9 AM EDT this morning. * IMPACTS. Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS. A portion of the advisory may need to be extended later into the morning if fog is slower to improve.

Areas of fog may reduce visibilities to a mile or less through 9 am. Patchy dense fog is also possible. Travelers should be prepared for quickly changing visibilities. Slow down and use your low beams in the fog. Visibilities are expected to improve after 9 am.

* WHAT. Visibility one quarter mile or less in dense fog. * WHERE. Southern Fairfield, Southern Middlesex, Southern New Haven, and Southern New London Counties. * WHEN. Until 9 AM EDT this morning. * IMPACTS. Low visibility could make driving conditions hazardous.

* WHAT. Dense fog will reduce visibility to 1 NM or less. * WHERE. New York Harbor, including Raritan Bay and Sandy Hook Bay, and South Shore Bays from Jones Inlet through Shinnecock Bay. * WHEN. Until 10 AM EDT this morning. * IMPACTS. Low visibility will make navigation difficult.

* WHAT. Dense fog will reduce visibility to 1 NM or less. * WHERE. Long Island Sound, and Peconic and Gardiners Bays. * WHEN. Until 10 AM EDT this morning. * IMPACTS. Low visibility will make navigation difficult. * ADDITIONAL DETAILS. The advisory may need to be extended into the afternoon.

Widespread fog will reduce visibilities to less than a mile through early Sunday morning. Patchy dense fog is also expected with visibilities less than a quarter mile at times. Travelers should be prepared for quickly changing visibilities. Slow down and use your low beams in the fog.

Fog will continue to develop tonight reducing visibilities to less than a mile through early Sunday morning. Patchy dense fog is also expected with visibilities less than a quarter mile at times. Travelers should be prepared for quickly changing visibilities. Slow down and use your low beams in the fog.

Widespread fog will reduce visibilities to less than a mile through early Sunday morning. Patchy dense fog is also expected with visibilities less than a quarter mile at times. Travelers should be prepared for quickly changing visibilities. Slow down and use your low beams in the fog.