BY REBECCA BENNETT — Updated at 7:07 a.m.  Prince George’s County Public Schools are operating on a two hour delay Wednesday, Jan. 14 (code orange).

The National Weather Service (NWS) has issued a second winter weather advisory this week for much of the Washington, D.C. metro area, including Prince George’s County.  The advisory is in effect from 4 a.m. until noon on Wednesday.

NWS says approximately one inch of snow is expected to accumulate, then eventually mix with sleet before dissipating by early afternoon.

The City of Hyattsville says “public works crews will be on duty after midnight tonight monitoring road conditions and treating road surfaces as needed.  Please use caution.”

Prince George’s County officials say a full deployment of resources will occur at midnight.  The county says approximately 220 crews will treat the primary and major collector roadways first, and then move into the residential areas.

“With the temperatures below freezing, the wintry mix of snow and freezing rain could impact the morning commute,” said Darrell Mobley, Director of the Department of Public Works and Transportation.  “Motorists are encouraged to remain off the roads, if possible, during the event.  If you do have to drive, please drive slowly and use caution when driving over ramps, bridges and overpasses since they normally freeze first.”

“While roads were generally in good condition earlier this week, a difference of only one or two degrees is the difference between wet roads and hazardous icy roads,” said Maryland State Highway Administration Administrator Melinda B. Peters. “Please take these forecasts and warnings seriously and consider delaying or cancelling your travel and appointments while we take care of making the roads safe for travel.”