The NOTAM states the field will be closed during AEROBATIC DEMONSTRATIONS.
From the AIRSHOW schedule:
Airshow (Daily) April 8 - 13
Tues. - Thu. 3:00 - 5:30 p.m.
Fri. - Sun. 1:00 - 6:00 p.m.
The night show on Friday starts at 7:30 pm, the same time the south side of the airport is closed.
Plan to be on downwind no later than 15 mins prior to the start of the airshow. Otherwise, you may end up being told to shutdown as you exit the runway and require a tow to your parking space.
Expect no arrivals prior to 1 hr after airshow closes. Also there will be periods of no arrivals/departures while high performance military display aircraft are arriving throughout the day during the week, so have plenty of fuel onboard or a definite alternate.
Interesting they left the times out of the NOTAM. Probably because the airshow details had not been finalized pending confirmation of the Thunderbird show requirements, who will fly on Fri-Sun.
There are numerous fly-bys of display aircraft conducted south of the main runway prior to the daily airshow beginning well before noon.