The National Weather Service has issued a winter storm watch for the entire Washington, D.C. metro area, Sunday morning through Monday morning. Parts of southern Maryland (Calvert and St. Mary’s counties) adjacent to the Chesapeake Bay are excluded from the watch.
Its forecast is consistent with ours, calling for 1-2 inches of snow and sleet (and 2-4 inches towards I-81 in western Virginia and western Maryland), followed by a period of freezing rain Sunday night and, ultimately, rain by Monday morning in most areas.
Here’s the full advisory text:
...WINTER STORM WATCH IN EFFECT FROM SUNDAY MORNING THROUGH MONDAY MORNING... THE NATIONAL WEATHER SERVICE IN BALTIMORE MD/WASHINGTON HAS ISSUED A WINTER STORM WATCH...WHICH IS IN EFFECT FROM SUNDAY MORNING THROUGH MONDAY MORNING. * PRECIPITATION TYPE...SNOW AND SLEET WILL CHANGE OVER TO FREEZING RAIN SUNDAY AFTERNOON. FREEZING RAIN IS EXPECTED TO LAST UNTIL LATE SUNDAY NIGHT OR MONDAY MORNING BEFORE CHANGING TO RAIN. * ACCUMULATIONS...1 TO 2 INCHES OF SNOW AND SLEET AND A QUARTER INCH OR MORE OF ICE ACCUMULATION IS POSSIBLE. * TIMING...SNOW AND SLEET ARE EXPECTED TO BEGIN SUNDAY MORNING. A CHANGEOVER TO FREEZING RAIN IS EXPECTED MIDDAY SUNDAY AND WILL CONTINUE INTO THE NIGHT BEFORE CHANGING OVER TO RAIN LATE SUNDAY NIGHT OR MONDAY MORNING. * TEMPERATURES...AROUND 30 DEGREES. * WINDS...LIGHT NORTHERLY WINDS. * IMPACTS...HAZARDOUS TRAVEL CONDITIONS ARE PROBABLE DUE TO SLICK ROADS AND ICY CONDITIONS SUNDAY AND POSSIBLY INTO MONDAY. INCREASED POWER OUTAGES ARE POSSIBLE. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT SNOW...SLEET...AND ICE ACCUMULATIONS THAT MAY IMPACT TRAVEL. CONTINUE TO MONITOR THE LATEST FORECASTS.