Dynamic Cooling with Upper Low Now Taking Over with Changeover to Snow In Newton, Jasper CountiesFebruary 26th, 2013 at 4:06 pm by Chad Evans under Chad's WLFI Weather Blog
As we approach evening, we are seeing a gradual changeover to snow in the viewing area & it is starting in our northwestern counties.
All snow now being reported at Morocco, Kentland & Remington. I have received several reports of big flakes mixing in with the rain in Benton County.
I can’t thank you spotters enough for your timely reports! Thank you!!!
There are little bits of elevated CAPE (instability) associated with the cold pocket aloft in south-central Illinois. So, I would not totally rule out a rumble of thunder in some of the periodic snow tonight as the upper low gets closer.
5,000′ temperatures have dropped at/below 32 degrees in Newton & Jasper counties, causing snow, rather than mix that is associated with a warm layer aloft. This gives the precipitation little chance to melt into a raindrop on the way down (whether it be just pure rain, rain freezing on contact [freezing rain] or the rain freezing into a pellet [sleet]).