We have entered meteorological fall, and the month of September. This is when we begin to see the battle of hot and cold across the Northern Hemisphere. Locally, we will be seeing that fight take place over the next two weeks. This week, we will see an upper level ridge build just to our east and this will allow for temperatures to approach the upper 80s and near 90 yet again through the middle of the week. Then, as we head towards the end of the week, things get interesting.

We will see a powerful cold front, that will be responsible for heavy snow in the Rockies, approach the Twin Tiers. No snow for us,  but this will be the start of cooler weather being funneled back into the region. This change, next weekend and into early next week, is all thanks to what was Typhoon Maysak in the Western Pacific. The typhoon moved north towards the Korean Peninsula and had a strong interaction with the upper level jet stream. It caused a zonal flow to become much more curvy. This curvy flow in the jet stream caused an increase in what is known as "Rossby waves" or weather patterns. This means we will see a greater number of cooler and warmer patterns set up across the globe and these patterns will continue to propagate around the globe. Here locally, we will see the pattern continue to go from hot to cold and potentially over the next several weeks. Next week though, it looks like we will enter the cooler pattern with temperatures slightly below average before going back to warmer weather for a bit.

This cold front will approach by late week with occasional showers and storms for Thursday through Saturday. This cold front could also give the Twin Tiers even more much needed rain, but uncertainty is too high to talk specifics right now. After this cold front pushes through, cool Canadian air will flood into the Eastern US and we could see temperatures struggle to get out of the 60s for a couple days. Uncertainty is still high in regards to how cool we can get, but cooler weather is likely on the way with highs next weekend and into early next week slightly below average. 

There is also another typhoon out in the west Pacific known as Super Typhoon Haishen and we will continue to monitor how that typhoon will impact the jet stream as well.

-Alex