Two Significant Storm Systems Now-FridayFebruary 28th, 2012 at 9:18 pm by Chad Evans under Chad's WLFI Weather Blog
It was a mild to warm day, especially in our southern counties!
The rain is now overspreading a chunk of the viewing area. We have dropped into the 40s due to evaporative cooling by the rain, but the warm front will overcome this overnight-early Wednesday morning, so temperatures will rise to near 58 by 7 a.m. T’Storms are occurring in Illinois & some of these will arrive overnight-early Wednesday morning. I would not be surprised to see an isolated hailer or two in the morning, before any t’storms exit.
Severe threat will reach I-70 overnight to early tomorrow morning.
Once all of this rain/t’storm action exit, partly cloudy skies will give way to sunny skies as dry line passes. It will drop our dew point from the 50s to the 20s & 30s. It will also pop a narrow line of low-topped storms right around Kewanna to Logansport to Michigantown to Lebanon & Brownsburg. These will rapidly move eastward & may begin to produce some severe wind as approach I-69.
It will turn sunny for everyone with a dry, very strong southwest wind sustained at 20-30 mph with gusts of 45-55 mph.
Storm system will pull a very brief cold shot Wednesday night-early Thursday morning with low clouds & a few snow flurries & snow showers. By Thursday afternoon, the low clouds will be scoured out, but high & mid clouds will already be streaming northward as a warm front surges back towards us.
This will arrive & pass Friday morning with a wave of showers & t’storms with a few hailers possible. Temperatures will skyrocket from the 30s & 40s to the 50s & then 60s rapidly.
Some sun will likely appear, south winds will gust to 40 mph & a squall line of severe t’storms will form in Illinois (may begin as supercells as first). This will pass in the late afternoon & evening, but it appears surface instability favors severe weather more south of an Otterbein to Battle Ground to Michigantown & Cicero. Damaging winds & perhaps an isolated EF0 tornado will be possible. More substantial tornado action may occur in southern Illinois & far southwest Indiana to Kentucky, Tennessee, Mississippi & Arkansas. A few strong, long-track EF3 tornadoes may occur in Arkansas & western Kentucky to Tennessee.