It's raining cats and dogs

"If you think I'm going out there, you are very much mistaken. It's hailing, hammering on the roof of the poly-tunnel like bullets. Why would I want to endure that? You go out if you want to Dad, but I haven't got a coat and hat....and I'm not being paid to do this!!!"
Dad and I are sheltering from the hail that has just swept in off the moor. We were digging trees up in the nursery, when Dad looked up towards the moor....and couldn't see it. By his reckoning that gives us about 5 minutes before the deluge begins. Anyway, 3 minutes later it started....wrong again, Dad.
Fortunately the poly-tunnel was only a short run away. The irony was that Dad had the overhead irrigation system going. Ha ha.