The National Weather Service has issued a Frost Advisory for Montgomery County and a Freeze Warning for Frederick and Carroll counties, with temperatures expected to fall into the low 30s early Monday morning.
Both alerts are in effect from 1am to 9am Monday, Oct. 19. The Frost Advisory includes Montgomery County, along with portions of Baltimore and Howard counties and areas of Northern Virginia. Temperatures could fall as low as 33 degrees, resulting in frost formation.
Communities included in the advisory include Rockville, Silver Spring, Bethesda, Gaithersburg, Germantown, Aspen Hill, Glenmont, Four Corners, Shady Grove and Boyds.
The National Weather Service warns that frost could harm sensitive outdoor vegetation and potentially kill sensitive plants if they are left uncovered. Residents are encouraged to take steps to protect tender plants from the cold.
Colder conditions are expected farther north and west, where a Freeze Warning has been issued for Frederick and Carroll counties in Maryland, as well as Culpeper, Fauquier and western Loudoun counties in Virginia.
Temperatures in the Freeze Warning area are expected to fall as low as 30 degrees. The coldest temperatures are expected in valleys and other low-lying areas.
According to the National Weather Service, frost and freezing conditions could kill crops and other sensitive vegetation and may damage unprotected outdoor plumbing.
The Freeze Warning includes Frederick, Westminster, Eldersburg, Buckeystown and other communities across Frederick and Carroll counties.