What you're seeing is low-topped convection under 10,000ft blowing from east to west in the easterly winds w/ precip in the higher levels of the atmosphere being blown from west to east in the mid/upper level westerlies. There is precip at many levels of the atmosphere because the surface to the upper-levels are moist enough to support it. That's a rough explaination of what's going on. Someone else can probably explain it in better detail than me.