Red sky at night means?

This is another winter photo from a resident of Hebburn on Tyne http://www.hebburn.org/  I asked Val can I use it on this blog,this was her reply with some more info on the actual picture.

........I took this picture because it was the sky facing east .not west where you would expect the sky to be red near sunset time

Thanks Val for allowing the use of this really good picture you took.Left click the photo to view in twice the size.

Roy