Haven't seen one of these...well, ever.

Blizzard Watch

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1013 AM EST WED JAN 20 2016

DCZ001-MDZ004>006-011-013-014-016>018-503>508-VAZ052>057-505-506-
202315-
/O.NEW.KLWX.BZ.A.0001.160122T1700Z-160124T1100Z/
DISTRICT OF COLUMBIA-FREDERICK MD-CARROLL-NORTHERN BALTIMORE-
SOUTHERN BALTIMORE-PRINCE GEORGES-ANNE ARUNDEL-CHARLES-ST. MARYS-
CALVERT-NORTHWEST MONTGOMERY-CENTRAL AND SOUTHEAST MONTGOMERY-
NORTHWEST HOWARD-CENTRAL AND SOUTHEAST HOWARD-NORTHWEST HARFORD-
SOUTHEAST HARFORD-PRINCE WILLIAM/MANASSAS/MANASSAS PARK-FAIRFAX-
ARLINGTON/FALLS CHURCH/ALEXANDRIA-STAFFORD-SPOTSYLVANIA-
KING GEORGE-WESTERN LOUDOUN-EASTERN LOUDOUN-
1013 AM EST WED JAN 20 2016

...BLIZZARD WATCH IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE
SATURDAY NIGHT...

THE NATIONAL WEATHER SERVICE IN BALTIMORE MD/WASHINGTON HAS
ISSUED A BLIZZARD WATCH...WHICH IS IN EFFECT FROM FRIDAY
AFTERNOON THROUGH LATE SATURDAY NIGHT.

* HAZARD TYPES...HEAVY SNOW AND WIND. A WINTRY MIX IS POSSIBLE
  FRIDAY NIGHT INTO SATURDAY MORNING EAST OF INTERSTATE
  95...BEFORE CHANGING BACK TO ALL SNOW ON SATURDAY.

* ACCUMULATIONS...POTENTIAL FOR A FOOT OR MORE OF SNOW.

* TIMING...FRIDAY AFTERNOON THROUGH SATURDAY NIGHT. CONDITIONS ARE
  EXPECTED TO DETERIORATE FRIDAY AFTERNOON WITH THE HEAVIEST
  SNOW...STRONGEST WINDS...AND POTENTIAL LIFE THREATENING CONDITIONS
  EXPECTED FRIDAY NIGHT THROUGH SATURDAY NIGHT.

* IMPACTS...HEAVY SNOW AND BLOWING SNOW WILL CAUSE DANGEROUS
  CONDITIONS AND WILL BE A THREAT TO LIFE AND PROPERTY. TRAVEL IS
  EXPECTED TO BE SEVERELY LIMITED IF NOT IMPOSSIBLE DURING THE
  HEIGHT OF THE STORM FRIDAY NIGHT AND SATURDAY. VISIBILITY WILL
  BE REDUCED TO NEAR ZERO AT TIMES IN WHITEOUT CONDITIONS.

* WINDS...NORTHEAST 10 TO 15 MPH FRIDAY. NORTHEAST WINDS WILL
  INCREASE TO 20 TO 30 MPH WITH GUSTS TO 40 MPH FRIDAY
  NIGHT...THEN SHIFT NORTH SATURDAY THROUGH SATURDAY NIGHT.

* TEMPERATURES...MID TO UPPER 20S MOST LOCATIONS. UPPER 20S TO
  LOWER 30S ACROSS SOUTHERN MARYLAND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

USE THIS ADVANCE NOTICE TO PLAN AHEAD! ADJUST TRAVEL PLANS...AND
PLANNED ACTIVITIES. STOCK UP ON NECESSITIES. MAKE PLANS FOR
ELDERLY FAMILY AND THOSE MOST AT RISK. PREPARE FOR THE POSSIBILITY OF
POWER OUTAGES DURING SNOWY AND COLD CONDITIONS. USE THIS TIME TO
MINIMIZE IMPACT ON YOU...YOUR FAMILY...AND YOUR COMMUNITY.