According to the log the alarm was triggered at 17:34:24. The issue is not one of triggering the alarm but rather what happened to the email.
Gary -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to weewx-user+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.