Montgomery County has declared a Code Blue ahead of the arrival of Winter Storm Helena that is projected to bring cold temperatures and light snow to the area late in the week. From Weather.com:
A piece of the energy associated with Helena will slide east ahead of the main system late this week.
Light snow from this disturbance will move into the central Plains beginning Wednesday night and will then slide east through the mid-Mississippi Valley into the Ohio Valley and central Appalachians Thursday.
This area of light snow is then expected to impact the mid-Atlantic and southern New England Thursday night into Friday.
Here is the announcement from the county regarding the Code Blue:
The Montgomery County Commissioners, on the advice of the Montgomery County Department of Public Safety, have declared a Code Blue Cold Weather Emergency for Montgomery County based on a review of forecasts from the National Weather Service.
The Code Blue Declaration has been issued for Montgomery County for the period beginning at 9:00pm on Wednesday, January 4, 2017 through 12:00pm on Monday, January 9, 2017.
A Code Blue Cold Weather Declaration is made in Montgomery County when winter conditions pose a threat of serious harm or death to individuals without shelter. A Code Blue is called when the combination of air temperature and wind chill is anticipated to be 20ºF or less.