Models have been trending slower with the backdoor front/more aggressive with the northward extent of the warm front, so ORD could see 75+ on Tuesday before it comes barreling down the lake (though the Euro doesn't even have it reaching the Illinois shore). Regardless, first 10 days of the month being in the top 10 warmest appears to be a lock at this point, and may even have a shot at top 5 warmest.