* WHAT. Sub-freezing temperatures as low as 29 expected. * WHERE. In Connecticut, Northern Fairfield, Northern Middlesex, Northern New Haven, and Northern New London Counties. In New Jersey, Western Bergen and Western Passaic Counties. In New York, Northern Westchester, Orange, Putnam, and Rockland Counties. * WHEN. From 3 AM to 9 AM EDT Thursday. * IMPACTS. Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

* WHAT. Temperatures dropping to around freezing. * WHERE. In Connecticut, Northern Fairfield, Northern Middlesex, Northern New Haven, and Northern New London Counties. In New Jersey, Western Bergen and Western Passaic Counties. In New York, Northern Westchester, Orange, Putnam, and Rockland Counties. * WHEN. From 3 AM to 9 AM EDT Thursday. * IMPACTS. Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

* WHAT. North winds 10 to 20 kt with gusts up to 30 kt and waves around 2 feet. * WHERE. In Massachusetts coastal waters, Boston Harbor. In Rhode Island coastal waters, Narragansett Bay. * WHEN. Until 4 AM EDT Thursday. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. Sub-freezing temperatures as low as 28 expected. * WHERE. Portions of northern Connecticut, southeastern Massachusetts, and northern and southern Rhode Island. * WHEN. From 2 AM to 8 AM EDT Thursday. * IMPACTS. Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

* WHAT. Sub-freezing temperatures as low as 29 expected. * WHERE. Eastern Norfolk MA, Southeast Middlesex MA, Suffolk MA, Eastern Essex MA, and Eastern Plymouth MA Counties. * WHEN. From 2 AM to 8 AM EDT Thursday. * IMPACTS. Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.