#ILWX #INWX #OHWX Wednesday Weather Forecast Discussion. JT.

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Forecast Discussion:

EVENING – TONIGHT: Snow showers continue to move into northeastern zone 7 and zone 1 from the northwest. These snow showers have developed ahead of an upper level piece of energy that is moving to the southeast.


Over the next few hours this area of snow will continue to the southeast. However, the air is pretty dry still across Indiana with very low dew points so snow is evaporating as it moves in. However, I do think the atmosphere will saturate over the next hour or so and snow will fall across the norther half if Indiana. By 4-5 PM snow showers will be falling across the northern portions of zone 1 in eastern Indiana and western Ohio.


By 7-8 PM tonight snow showers will remain possible across northern zone 1 in Indiana and Ohio. However, I think a lot of these will be pretty light in nature at this time.


Through the evening and into the early overnight snow showers will end as the 500 mb vorticity max moves through. By midnight most of the snow will end with only a few light snow showers or flurries continuing.


While no significant accumulation is forecast a coating of snow will be possible across northern zone one, with perhaps .1-.3” across the far northern counties.


Overnight snow will move out of the region, but clouds will continue. Some warmer air looks to lift into the region tonight and may actually allow temperatures to rise into the upper teens north to around 30 south.

THURSDAY: A mix of clouds and sun can be expected through the day on Thursday, right now leaning more towards the clouds side of things. Warmer air will start to move in from the south so temperatures will warm somewhat.


However, the snowpack will really hinder temperatures response to the warm air advection across most of the region. Highs on Thursday will be in the mid 30’s north to around 50 where there is no snow.

Late Thursday night into Friday and area of low pressure will lift to the regions west and north dragging a cold front with it. Some isolated to widely scattered chances of rain showers will enter the region from the west and south late in the night Thursday into Friday.

Overnight lows will be in the mid 30’s to upper 40’s.

FRIDAY: The area of low pressure is forecast to move to the regions north on Friday. As a cold front progresses east across Illinois early in the day rain chances will start to increase across the region by 7-8 AM.

By early afternoon the cold front will be moving across central/eastern Illinois. Rain chances will increase across Indiana and Ohio by late morning into early afternoon on Friday. Behind the front temperatures will start to fall, so a changeover to some snow is likely late in the day.


By late Friday afternoon into early evening the cold front looks to sweep west to east across Indiana, dropping temperatures as it does. In fact, as it moves through enough moisture looks to remain for some snow by Friday evening into the early night-time hours.

Highs on Friday will be in the mid 20’s to around 40.

WEEKEND: Saturday the cold front will have exited the region to the east. Behind it a very strong area of high pressure will start to build down from the north. Winds behind the front look to shift out of the north and northwest. With this in mind, it will help generate some lake effect snow showers and a few of which could make it into northern zone 1 Saturday.


Temperatures will fall through the day on Saturday as the high start to move south into the Plains/Midwest. Temperatures look to fall into the upper teens to around 30 by late afternoon across the forecast region.

Saturday night into early Sunday we will be watching another clipper system move across the forecast region that could bring us another round of snow. While models aren’t overly impressive with moisture low temperatures will fall into the single digits and teens, so very high snow ratios will occur.

Currently models aren’t overly impressive with snow totals with the EURO/CMC showing less than an inch. However, I wouldn’t be shocked to see those increase as the time period gets closer.


Sunday the snow will move out of the region, but the area of high pressure will build in. This will bring brutally cold air to the region for the end of the weekend. With the strong area of high pressure and snowpack highs may only warm into the single digits on Sunday across portions of the region.


The low temperatures and winds will likely make it feel near or below zero through the daytime on Sunday.

Sunday night lows will be brutally cold with actual air temperatures falling below zero per latest GEM model guidance!

sun night