FROST ADVISORY IN EFFECT FROM 4 AM TO 9 AM EDT WEDNESDAY. * WHAT. Temperatures in the mid 30s will result in frost formation. * WHERE. Augusta, Rockingham, Shenandoah and Page Counties. * WHEN. From 4 AM to 9 AM EDT Wednesday. * IMPACTS. Frost could kill sensitive outdoor vegetation if left uncovered.

FROST ADVISORY REMAINS IN EFFECT FROM 4 AM TO 9 AM EDT WEDNESDAY. * WHAT. Temperatures as low as 32 will result in frost formation. * WHERE. Augusta, Rockingham, Shenandoah and Page Counties. * WHEN. From 4 AM to 9 AM EDT Wednesday. * IMPACTS. Frost could kill sensitive outdoor vegetation if left uncovered.

SMALL CRAFT ADVISORY IN EFFECT FROM 11 PM THIS EVENING TO 1 PM EDT THURSDAY. . GALE WATCH IN EFFECT FROM LATE FRIDAY NIGHT THROUGH SATURDAY EVENING. * WHAT. For the Small Craft Advisory, northwest winds 10 to 20 kt with gusts up to 25 kt expected. For the Gale Watch, southwest winds 20 to 25 kt with gusts up to 40 kt and waves 2 to 4 ft possible. * WHERE. Tidal Potomac River from Key Bridge to Smith Point VA, and Chesapeake Bay and adjoining estuaries north of Smith Point VA. * WHEN. For the Small Craft Advisory, from 11 PM this evening to 1 PM EDT Thursday. For the Gale Watch, from late Friday night through Saturday evening. * IMPACTS. Strong winds can cause hazardous waves which could capsize or damage vessels.

SMALL CRAFT ADVISORY IN EFFECT FROM 11 PM THIS EVENING TO 1 PM EDT THURSDAY. . GALE WATCH IN EFFECT FROM LATE FRIDAY NIGHT THROUGH SATURDAY EVENING. * WHAT. For the Small Craft Advisory, northwest winds 10 to 20 kt with gusts up to 25 kt expected. For the Gale Watch, southwest winds 20 to 25 kt with gusts up to 40 kt and waves 2 to 4 ft possible. * WHERE. Tidal Potomac River from Key Bridge to Smith Point VA, and Chesapeake Bay and adjoining estuaries north of Smith Point VA. * WHEN. For the Small Craft Advisory, from 11 PM this evening to 1 PM EDT Thursday. For the Gale Watch, from late Friday night through Saturday evening. * IMPACTS. Strong winds can cause hazardous waves which could capsize or damage vessels.

Patchy Freezing Fog and Patchy Black Ice Possible In Central Shenandoah Valley This Morning. Patchy freezing fog has developed in parts of the central Shenandoah Valley between Waynesboro and Luray to New Market, where temperatures are between 30 to 32 degrees. Visibility is being reduced to one-quarter of a mile in some areas. Drivers should use caution when driving as patchy black ice might be present, especially on elevated surfaces such as bridges. Driver should also be alert for rapidly changing visibility, and should slow down and increase following distance when driving in fog. The fog is expected to dissipate by 9 AM as temperatures also rise above freezing.

FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM EDT THIS MORNING. . FREEZE WARNING IN EFFECT FROM 4 AM TO 9 AM EDT THURSDAY. * WHAT. For the Frost Advisory, temperatures as low as 33 will result in frost formation. For the Freeze Warning, sub-freezing temperatures as low as 30 expected. * WHERE. Shenandoah and Page Counties. * WHEN. For the Frost Advisory, until 9 AM EDT this morning. For the Freeze Warning, from 4 AM to 9 AM EDT Thursday. * IMPACTS. Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

FREEZE WARNING IN EFFECT FROM 4 AM TO 9 AM EDT THURSDAY. * WHAT. Sub-freezing temperatures as low as 30 expected. * WHERE. In Maryland, Northwest Montgomery and Northwest Howard Counties. In Virginia, Frederick, Warren, Clarke, Rappahannock, Northern Fauquier and Western Loudoun Counties. * WHEN. From 4 AM to 9 AM EDT Thursday. * IMPACTS. Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.