Just plug that stuff into that website and let er rip!!! Ok, that was just wrong I know... sorry about that. Couldn't resist
With having 10 days under your belt and 20-some to go this season, I'd highly recommend warmers. Instead of heat cycling your tires 5-6 times per day, you only heat cycle your tires one time (tires perform better over their life). That first lap (and 2nd and 3rd) you don't have to question if your tires are warm - they are... you can go fast right away! Will help prevent cold tears too.
I've raced in the 40's and believe me, you definitely can get heat in the tires... but as you may have guessed... it's a double edge sword. Scared to go fast, tires cool off... less grip.
My advice to you, since you're not using warmers... go out as you normally do. Warm you and the bike up the first couple laps. Ease into the speed... you tires will stick MUCH more than you can imagine. Pay attention to the tires and the bike, if you feel the front start sliding or the rear start spinning up, adjust your body position, adjust your line, adjust your entry speed, etc.
Get some tire warmers... you'll have MUCH more confidence when you hit the track!! Good luck out there and have fun!!!