Arctic air spills south

It's been a month of ups and downs with temperatures for the most part running above average some +10° at times. All of that is about to change, beginning with this afternoon and lasting through the end of the week.


Temperatures this past weekend were in the low 60s but with a constant flow of cooler air being brought in today highs will top 59°. This continued cold air advection will be in place as an area of low pressure currently moving through the Plains this morning slides just to our south and strengthens over the Ohio River Valley by Wednesday. As the low strengthens and high pressure moves straight down from the north the cold air from northern Canada will spill southward into the Midwest and Great Lakes. Of course it will modify some but remain cold enough to keep highs Wednesday and Thursday only near 50°.

If the chilly air weren't bad enough we'll be dealing with a fairly brisk wind straight from the north. That combined with cloud cover and on/off rain showers will make for a pretty blustery Wednesday. Temperatures will begin to moderate some by this weekend but looking at some of the longer range forecasts it appears as if we could be in for another chilly blast sometime around Halloween!