We are going to make it through the entire month of July without a single 90° day. Looking into the first week of August we should see seasonably warm conditions but probably nothing close to 90°. The cause is a persistant northwest flow aloft keeping it unseasonably cool. While this northwest flow keeps temperatures cool and humidity levels low, once in a while you can still get a nasty severe weather outbreak. When winds at the surface turn to the southwest and temperatures climb into the 80s the atmosphere becomes unstable and sheer develops. This change in wind direction with height can ocassionally lead to tornadoes like we saw in Boone county on Thursday.
This July will go down as the coolest since the official reporting site was moved away from the lakefront in 1942. The average temperature this July is only 69.4° which is nearly 4 degrees below normal. Our average high is now down to 83° and in less than 4 weeks our average high is back into the 70s
