* WHAT. Sub-freezing temperatures as low as 31 possible. * WHERE. Portions of central, northern and southern New Jersey and southeast Pennsylvania. * WHEN. From late tonight through Friday morning. * IMPACTS. Frost and freeze conditions will kill crops and other sensitive vegetation.

* WHAT. Sub-freezing temperatures as low as 31 possible. * WHERE. Portions of central, northern and southern New Jersey and southeast Pennsylvania. * WHEN. From late tonight through Friday morning. * IMPACTS. Frost and freeze conditions will kill crops and other sensitive vegetation.

* WHAT. Sub-freezing temperatures as low as 31 possible. * WHERE. Portions of central, northern and southern New Jersey and southeast Pennsylvania. * WHEN. From late tonight through Friday morning. * IMPACTS. Frost and freeze conditions will kill crops and other sensitive vegetation.

* WHAT. Northeast winds 10 to 20 kt with gusts up to 30 kt and seas 3 to 6 ft. * WHERE. Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20 nm, Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20 nm, Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm, Coastal waters from Cape May NJ to Cape Henlopen DE out 20 nm and Coastal waters from Cape Henlopen to Fenwick Island DE out 20 nm. * WHEN. Until 6 AM EDT Friday. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. Sub-freezing temperatures as low as 30 degrees possible. * WHERE. Portions of central, northern, northwest and southern New Jersey and east central and southeast Pennsylvania. * WHEN. From late tonight through Friday morning. * IMPACTS. Frost and freeze conditions will kill crops and other sensitive vegetation.

* WHAT. Temperatures as low as 34 will result in frost formation. * WHERE. Portions of central, northern and southern Delaware, northeast Maryland, central and southern New Jersey and southeast Pennsylvania. * WHEN. From 2 AM to 9 AM EDT Friday. * IMPACTS. Frost could kill sensitive outdoor vegetation if left uncovered.

* WHAT. Sub-freezing temperatures as low as 29 expected. * WHERE. Portions of central, northern, northwest and southern New Jersey and east central and southeast Pennsylvania. * WHEN. From 2 AM to 9 AM EDT Friday. * IMPACTS. Frost and freeze conditions will kill crops and other sensitive vegetation.

* WHAT. East winds 10 to 20 kt with gusts up to 25 kt and seas 3 to 6 ft. * WHERE. Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20 nm, Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20 nm, Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm, Coastal waters from Cape May NJ to Cape Henlopen DE out 20 nm and Coastal waters from Cape Henlopen to Fenwick Island DE out 20 nm. * WHEN. Until 4 AM EDT Friday. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. Up to one half foot of inundation above ground level possible in low lying areas due to tidal flooding. * WHERE. Shoreline in Anne Arundel County. * WHEN. From 2 AM EDT Friday through Friday morning, especially around the time of high tide. * IMPACTS. At 2.8 feet, flooding of some of the parking area near Dock Street in Annapolis may occur, with water surrounding the Alex Haley Memorial. * ADDITIONAL DETAILS. Tides one to one and a half feet above normal. The affected high tide at Annapolis U.S. Naval Academy will be at 7:42 AM.

* WHAT. East winds 10 to 20 kt and seas 3 to 6 ft. * WHERE. Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20 nm, Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20 nm, Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm, Coastal waters from Cape May NJ to Cape Henlopen DE out 20 nm and Coastal waters from Cape Henlopen to Fenwick Island DE out 20 nm. * WHEN. Until 4 AM EDT Friday. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. Temperatures as low as 34 will result in frost formation. * WHERE. Portions of central, northern and southern Delaware, northeast Maryland, central and southern New Jersey and southeast Pennsylvania. * WHEN. From 2 AM to 9 AM EDT Friday. * IMPACTS. Frost could kill sensitive outdoor vegetation if left uncovered.

* WHAT. Sub-freezing temperatures as low as 29 expected. * WHERE. Portions of central, northern, northwest and southern New Jersey and east central and southeast Pennsylvania. * WHEN. From 2 AM to 9 AM EDT Friday. * IMPACTS. Frost and freeze conditions will kill crops and other sensitive vegetation.

* WHAT. Temperatures around 34 to 37 degrees will result in frost formation. * WHERE. Carroll, Cecil, Northern Baltimore, Northwest Harford, and Southeast Harford Counties. * WHEN. From 2 AM to 8 AM EDT Friday. * IMPACTS. Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

* WHAT. Up to one half foot of inundation above ground level expected in low- lying areas near shorelines and tidal waterways. * WHERE. Dorchester County. * WHEN. From midnight EDT tonight through late tonight. * IMPACTS. Shallow flooding is possible in the most vulnerable locations near the waterfront and shoreline.

* WHAT. Northeast winds 10 to 15 kt with gusts up to 20 kts. * WHERE. Chesapeake Bay from Pooles Island to Sandy Point MD. * WHEN. Until 5 PM EDT this afternoon. * IMPACTS. Conditions will be hazardous to small craft.