Freeze warning appears to be from 2am to 8am, although some forecasts show temps well above freezing. 6 hrs is not really long enough to cause any issues for most setups:
Recently, there have been a lot of questions from those living in moderate climates about using automatic freeze protection or running pumps to prevent freezing and what a pool owner should do when temperatures drop so I thought it might be useful to have a thread which dealt with the issue from...
www.troublefreepool.com
The most vulnerable plumbing would be any pipe smaller than 1.5" such as a pressure side pool cleaner.
If you want to be extra cautious, just run your VS pump at a low RPM with all water feature valves open.
