Fall has definitely arrived!
In case you missed the memo, Fall has officially arrived.
The first day of fall was appropriately cool too. Although the high did manage to reach 76° at the airport in Louisville this afternoon. It felt cooler when you factored in the breezy northwest wind.
A very chilly airmass is now decending on the area. In fact, the National Weather Service out of Indianapolis has issued a Frost Advisory for Lawrence, Jackson and Jennings Counties.
A Freeze Warning is in effect for much of the Midwest and Northern Plains where lows are expected to drop down into the 20's! Brrr.
Fortunately, we are not expecting temps to be that cold here. However, lows could dip into the upper 30's for parts of Southern Indiana overnight where some light patchy frost is possible.
The current jet stream pattern features a deep troud of low pressure over the Great Lakes. Meanwhile, a ridge is building to the west.
After another very chilly night Sunday night, our weather pattern will change significantly this coming week.
The upper trough will lift and our surface winds will turn back around to the south bringing us some much warmer conditions by midweek.
In addition, several weak upper level disturbances will interact with higher moisture values and should result in multiple chances of rain.
I'll have more on that idea tomorrow.
Meteorologist Jeremy Kappell