The strong cold front is now into Ohio.  The timing of this front will bring very cold arctic  across the DC area tomorrow afternoon, now I think 2-7PM.  Before the front arrives we will have some rain showers or a mix or light rain and snow but with the front we are likely to see snow squalls and reduced visibility and local heavy snow for an hour or more.  Where these squalls do hit, a quick 1-2" snow is possible late Saturday afternoon and very slippery driving will happen very rapidly.  Be careful and be alert to local heavy snow squalls Saturday afternoon.  By Sunday morning temperatures will be in the teens and wind chills near 10.  Sunday a rare very cold day for this winter.  Milder air right back by the middle of the coming week