Not exactly observing "tonight" but mark your calendars for the evening of Sept 2nd around 11:30 PM to watch the moons of Jupiter
disappear either in front of Jupiter (shadows of Europa and Ganymede) while Callisto and Io will either be behind Jupiter or eclipsed by Jupiter's shadow.
I believe these are the correct times for CDT:
06:28 PM (23:28 UT) Callisto enters occultation behind Jupiter
10:44 PM (03:44 UT) Io enters occultation behind Jupiter
11:00 PM Europa begins transit of Jupiter
11:46 PM Ganymede begins transit of Jupiter
11:56 PM Europa's shadow begins to cross Jupiter
01:32 AM Io exits eclipse by Jupiter's shadow
01:46 AM Ganymede's shadow begins to cross Jupiter
01:50 AM Europa ends transit of Jupiter
02:50 AM Europa's shadow leaves Jupiter's disk
03:24 AM Ganymede ends trasit of Jupiter
03:44 AM Callisto exits eclipse by Jupiter's shadow
05:24 AM Ganymede's shadow leaves Jupiter's disk
Hope you can catch some of this. B