Meso-low on Visible Satellite

I noticed this in the Visible satellite imagery a couple of days ago and saved some data. If you look closely at the loop below, you'll see a subtle rotation in the clouds northwest of Sioux Falls, SD:


(click on the image to see a larger version)

When comparing this with the 20z RUC analysis, you can clearly see the meso-low in the 500mb vorticity fields over the same area:



Kind of cool to see the meso-low being picked up in both the 13km RUC data and in the Visible satellite image.