So we had somewhere between 5-12" of rain in the Houston area over the last 24 hours, which is why I was really surprised that my Rachio started a flex schedule run this morning. Obviously with a major storm/flooding there's a lot of power/Internet interruptions, and it appears upon investigation that the nearby weather station I point to has been out of service for 12+ hours (at the time, it's still off-line). I assume that means that the Rachio didn't see any data, and therefore started its schedule run accordingly...
The support for WU / personal weather stations is a great feature of the product, but a bit of fallback support for these less-reliable data sources would be helpful. A really simple way to do this would be to allow for a second (even third?) weather station in the configuration. If the first station isn't responding with current/valid data, then (and only then), try the backup source.
I'd likely keep my normally reliable, close-by station as my primary, and perhaps use a more official (but ~15 miles away) station as a backup. That would have at least figured it better than nothing!
(And if Rachio wants to look at my device log, the Flex schedule that ran was for this 5am this morning, 5/28/16).