Clipper may drop fresh coating of snow Saturday

Is your snow getting stale? A weak disturbance swinging by to our north Saturday could top it off with a dusting to 1 inch.

The best chance of totals near 1 inch are in our northern  suburbs .  The most likely timing for snow is during the afternoon – but the possible window for snow showers extends from the morning to early evening.

High resolution NAM model simulation of Saturday snowfall (WeatherBell.com)

High resolution NAM model simulation of Saturday snowfall (WeatherBell.com)

This little disturbance or clipper system doesn’t have much moisture to work with and is passing to our north.  Usually that means we get little precipitation.  And sometimes when the system passes to our north, the southerly winds ahead of it means rain rather than snow.  But, in Saturday’s case, we’ll have a sufficient supply of remnant arctic air for the precipitation to fall as snow.  While temperatures won’t be as cold as today, Saturday’s highs probably only max out in the upper 20s to low 30s (in milder areas).

Computer models are generally simulating around 0.05-0.1″ of liquid equivalent precipitation which would convert to about a coating to 1″ of snow (isolated higher totals can’t be ruled out somewhere).  The heavier amounts are forecast north and northeast of the city.

National Weather Service snowfall forecast for Saturday

National Weather Service snowfall forecast for Saturday

The snow activity is likely to come in hit or miss bands, which move through intermittently.  A brief  period of steadier snow can’t be ruled out, especially north of town.

I don’t expect major problems from this disturbance, but snow showers could briefly reduce visibilities and put down a slick coating on roads as surfaces are very cold.

We’ll update on this little system in our PM Update later today and, of course, in updates Saturday.

 

Also on Capital Weather Gang

D.C. area forecast: Arctic returns today, with little thawing over coming days