I'll add this about @Ruin - as much as his posting style tends to be off-putting to many of us, once you wade through the negativity...the overall message is often correct. My forecast low from CTP for this morning was 19, my actual low was 26! In fact, it's an above normal temp morning here in Maytown. The International Airport down the road (club boasts that it has parachute jumpers from all over the world, easily qualifying us as an International Airport) had a low of 25. It just simply isn't as cold as what was originally forecast, and that's what Ruin ruined us with.
For the day, I averaged a -3 departure with my well below average high.