The National Weather Service has increased projected snowfall totals across the region, but forecasters stress that the range of possible outcomes remains extremely wide, reinforcing a classic boom-or-bust setup ahead of Sunday into Monday.
The latest official NWS snowfall forecast shows several inches possible across much of the DC area, with higher amounts north and east (about 3-5 inches across most of the area). However, the accompanying probability maps highlight just how uncertain this storm remains. For the immediate DC metro area, the chance of seeing six inches or more is still relatively modest, while significantly higher totals remain a lower-probability outcome.
One NWS map illustrates the high end scenario, representing a 10% chance of heavier snowfall (15 inches in Rockville). In that outcome, parts of Maryland and the broader Mid-Atlantic could see totals well into the double digits, especially north and east of DC. Another map shows the low-end scenario, which reflects a much more common outcome and keeps totals considerably lower, in some cases closer to half of an inch…