Heavy Hitting, Major Winter Storm

Total Snowfall Accumulation Forecast by 3 AM Thursday:

Timing, Delays, Cancellations:

  • Sleet & Snow mixed will re-develop between 3 and 5 PM and then become heavy, wet snow after 5PM.
  • Heavy snow will continue through the evening before it tapers off  around midnight and ends between 1 and 3AM.
  • Federal Government employees… I am 90% confident of a 2 hour delayed opening Thursday with Unscheduled Leave.



  • Generally 5 to 10″ can be expected across Northern Virginia and northern & central Maryland.
  • The urban heat island of Washington DC and south Arlington will see accumulations of 4 to 6″.
  • Totals across southern Maryland will range from 3 to 5″.


Heavy Wet Snow:

  • Scattered Power Outages and downed trees are possible under the weight of this snow storm.
  • Untreated roadways will become very slippery as temperatures drop into the upper 20s Thursday morning.


Upper Level Low Will Bring… Heavy Wet Snow


  • Light snow mixed with rain and sleet develops predawn Wednesday transitioning to all snow by mid to late afternoon.
  • Heavy, wet, snow will continue past the evening rush hour. Untreated roadways will quickly become snow covered and sloppy as snowfall rates of 1″ per hour are possible in heavy snow bands.



  • Back-breaking wet snow of 4 to 6 inches with isolated sweet spots of 7 to 9″ underneath the heavier banding of snow (this area is yet to be determined).
  • I will issue an updated snowfall accumulation map this afternoon.