The Problem with Weather Forecasts...

...is that they are often incorrect. For example on this particular night the weather forecast called for the low to be a balmy 28 with highs in the mid 50's on Tuesday. Instead I woke up to this:
Yikes! Now, with a full drop sprinkler system, ice is not nearly the concern it is with the old school spray from the top sprinklers, but it still causes one a little worry.
I made my way over to see the sprinkler still standing and running fine. I decided to wait for temps to get above freezing to shut the system off, though, in order to allow the system to drain completely.
I came back after lunch to check again (as temps were nowhere near above freezing, much less mid fifties) , and found quite a little ice buildup:





I also noticed this tower making unusually deep ruts. How 'bout that!

I also snapped this picture to prove I wasn't the only one who trusted the weatherfolk.
Ice is apparently the least of this systems worries, however. Note the "frozen" gearbox.

Anyhoo it was well after 5 in the PM before temperatures became warm enough that I was comfortable about draining the system: