Full Notification

* WHAT...Sub-freezing temperatures as low as 30 possible.

* WHERE...The central and northern Shenandoah Valley, Washington County Maryland, and portions of the Potomac Highlands.

* WHEN...From late tonight through Monday morning.

* IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

* AFFECTED AREAS: WASHINGTON ... AUGUSTA ... ROCKINGHAM ... SHENANDOAH ... FREDERICK ... PAGE ... WARREN ... CLARKE ... NORTHERN VIRGINIA BLUE RIDGE ... CENTRAL VIRGINIA BLUE RIDGE ... HAMPSHIRE ... MORGAN ... BERKELEY ... JEFFERSON ... HARDY

Instructions:

Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing.