It was clear from the radar over an hour before it got here that
we were in for a thunderstorm:

But with plenty of time I took the tractor out (after putting some oil in one of
the mower's gear boxes) and started mowing the south and then the west runway.
This gave me the perfect viewing point and a reason to hang out there to watch
the incoming storm. I kept mowing until the last minute with just enough time to
put the tractor and mower away, get back on my bike and get to the Oz Report
World Headquarters to get this shot before it hit: