This is one active forecast! I will allude to each day & night in detail below (based on the latest forecast data available).
Freezing rain & some sleet continues along & north of a Pine Village to West Lafayette to Peru line. In these areas, temperatures are running 30-35. Minor ice accumulation has been occurring. I measured 0.01" of freezing rain & melted sleet at West Lafayette.
Why are we still seeing some freezing rain at West Lafayette & Fowler with 35? The ground is very cold & frozen & the INDOT sensor at U.S. 41 & Indiana 18 show a road subsurface temperature of 30 & surface temperature of 32. So, some freezing rain will continue a while longer despite rise to 35.
Everyone should go to all rain by 8 p.m.
Rain could become moderate to heavy at times tonight. An isolated rumble of thunder cannot even be ruled out overnight to very early Wednesday morning.
Temperatures will rise to 39-44 by early Wednesday morning, so there will be lots & lots of melting of the snow, but this thick layer frozen in the ground may only thaw slightly on top. This means lots of run off, leading to substantial rises in creeks & streams clogged with ice.
There will be lots of ponding on roadways, especially secondary roads. Some drains clogged by snow & ice may cause rainwater to back up. Watch for hydroplaning overnight to Wednesday morning.
South to south-southwest winds may gust 35-45 mph at times tonight. I cannot rule out an isolated gust or two that exceeds 45 mph. So, bring your trash cans in!
It looks like it will stay warm enough for rain right well into Wednesday. Transition to some light snow/flurries may not even reach our northwest until near 11 a.m. & then central part of area by 1 p.m. & far east by 3 p.m.
0.80-1.50" rainfall is possible over frozen ground with some roads covered in some lingering ice.
However, once it begins to cool, it will cool quickly! Temperatures should fall from 38-45 morning to early afternoon to 20s by early evening! It could fall nearly 20 degrees in a couple of hours!
Near flash freezing is possible on howling west-northwest winds 35-45 mph at times.
Much of the deep moisture will exit by the time the cold air rushes in. However, some flurries & snow showers are possible afternoon-evening into the night-time. Any accumulation would be local & very minor at 0.5" or less. A few slick spots are possible from freezing water & some light snow.
Winds will relax Wednesday night, but lows will drop 9-15 with wind chills -7 to 4 by early Thursday morning.
Wave of snow with windy conditions is likely Thursday. After 20s to around 30 around midday, temperatures will fall to teens in the afternoon. 1" or less of snow is expected, but any small amount will blow around with the gusty winds.
Brutally cold weather will arrive Friday with sun/clouds & few flurries, mainly early. Highs will only reach 6-12 after 0-6 in the morning. Morning wind chills may drop to as low as -25 & remains well-below zero through the afternoon.
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