Winter storm watch issued for much of D.C. area Sunday into Monday

Area shaded in blue covered by winter storm watch (National Weather Service)
Area shaded in blue covered by winter storm watch (National Weather Service)

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.
Jason is currently the Washington Post’s weather editor. A native Washingtonian, Jason has been a weather enthusiast since age 10.
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