URGENT - WEATHER MESSAGE National Weather Service Baltimore MD/Washington DC 151 PM EDT Wed Oct 23 2019 Frederick MD-Carroll-Northwest Montgomery-Northwest Howard- Central and Southeast Howard-Nelson-Albemarle- Prince William/Manassas/Manassas Park-Stafford-Spotsylvania- Western Loudoun-Eastern Loudoun- Including the cities of Frederick, Ballenger Creek, Eldersburg, Westminster, Germantown, Damascus, Lisbon, Columbia, Ellicott City, Lovingston, Charlottesville, Dale City, Manassas, Woodbridge, Lake Ridge, Montclair, Falmouth, Fredericksburg, Purcellville, Leesburg, Ashburn, and Sterling 151 PM EDT Wed Oct 23 2019 ...FROST ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM EDT THURSDAY... * WHAT...Temperatures reaching the mid 30s will result in frost formation. * WHERE...Portions of central and north central Maryland and central and northern Virginia. * WHEN...From midnight tonight to 9 AM EDT Thursday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. By The National Weather Service, Sterling, Va.