What a difference a day makes! Temp dropped from 20 yesterday to 5 today. RH was lower too, as N winds forced the jet stream Southward. The result was a great 8 mile run, with 3 of them at threshold (8:20) sandwiched between a 2 mile warmup and a 3 mile cooldown. The cooler weather is supposed to hang around, so I should get 3 more good runs in before heading West to the mountains again.