Yeah I have had two lows of 33 this month with a bunch of frost. The satellite loop does show a lot of banding with the clouds and they are moving fast. Hopefully you are right and they dissipate.
That's kind of only half the story though. We have actually had a good number of below normal mins, and 51/36 is actually a pretty nippy day for this time of year. BTW these clouds could easily dissipate over the next couple of hours. This type of airmass doesn't really support low cloud formation tonight.