Double storm lines

[Jody Radzik]

A few days ago, I observed a fairly strong linear storm system in Richmond, VA. On radar, this appeared as a very straight line tilted from the southwest toward northeast. I'm assuming this was along an advancing cold front. What I'm curious about is a second line, about ten miles behind the first. This didn't appear on radar except for a small area at the north end of the cloud line. My question is, why does this second line form?

Thanks in advance for your thoughts on this.

 

[rdale]

A line of storms? Or just clouds/showers? Any radar snaps / surface features / upper air plots / etc from the time in question?

 

[Jody Radzik]

It was really just clouds, but lined up as if a reflection of the storms.

 

[Mark Ellinwood]

The clouds most liekly formed off of forcing from the cold pool behind the storms or by the forcing of the cold front itself (as a mature line of storms can race out ahead of the cold front).