That flight represents an awesome way to fly - or should I say chase storms:) I hope I get a 40th birthday present flying in front of a tornadic supercell in the United States. Fantastic piccies there!
Yes the cold air continues to blast us and nights are cold - 4 consecutive days of frosts! I bet by the weekend we may see some severe frosts once again. Nothing unusual for this time of the year.
As to the question you had about sheep. twins are not uncommon but triplets are less common except in a particular breed of Merino so I was told this morning. So the important thing to note is that breeds affect the number of lambs they have.