Why So Cool In July? - 07/29/14
I hope everyone was able to get out and enjoy the beautiful weather we had today... highs topped off around 81 degrees in Nashville. (the average for this time of year is 89). Just for perspective, 75 degrees is the "coolest high" on record for this day, set back in 1891. We were only 6 degrees away from it! Plus tonight we could see a record low in Nashville and Crossville. (Check out the graphic for details)
So, why is it so cool in July? Why is it feeling more like early fall than mid summer? It has to do with our weather pattern in the upper atmosphere. Normally in the summer months the jet stream retreats to the north and hangs out around the Great Lakes. But this week, we're seeing a jet stream pattern more typical in the winter time. The jet stream has dipped into the deep south, allowing for cool, Canadian air to say hello. (Of course, we're not facing winter-like temperatures because of the summer season and high sun angle).
Will it last? Unfortunately, no. But we'll still feel quite comfortable through the week. Temperatures will climb to the upper 80s, but humidity will remain on the low side. Enjoy!