Edit: this post originally stated the upgrade would occur on 4/21 (Saturday) and has been updated to reflect the correct day of the week (Sunday).
UPDATE
[2019-04-21 11:57:02 | Derek Calderon]
This morning’s wi-fi upgrade was successfully completed without event. The network was offline for approximately 11 minutes.
Please email help@eecs.berkeley.edu if you are having wi-fi trouble in your area.
Resolved as of 2019-04-21 01:11:00