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(11:45AM Thur, March 30th 2023) Thursday morning update on a storm system that will move through the region on Friday, bringing the likelihood for severe t'storms to much of the state. With this update we have expanded level 3 severe t'storm risk probabilities across portions of Northern Illinois.
Timing... •Early Friday afternoon - Early Friday night, March 31st. Location... •All of Illinois. Impacts... •A level 2 to 3 severe t'storm risk is in place across all of Illinois, from early Friday afternoon through early Friday night. •Widely scattered to scattered severe t'storms are likely, posing a risk of damaging winds, large hail and some tornadoes. 
JP
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(10:30PM Wed, March 29th 2023) A storm system will move through the region on Friday, bringing the likelihood for severe t'storms to the state.
Timing... •Early Friday afternoon - Early Friday night, March 31st. Location... •All of Illinois. Impacts... •A level 2 to 3 severe t'storm risk is in place across all of Illinois, from early Friday afternoon through early Friday night. •Widely scattered to scattered severe t'storms are likely, posing a risk of damaging winds, large hail and some tornadoes. 
JP
(11:45AM Sun, March 26th 2023) Sunday morning update regarding a storm system that will move through the region today, bringing the potential for severe t'storms to portions of the state.
Timing... •Early this afternoon - Early today night, March 26th. Location... •Northern & Central Illinois. Impacts... •A level 1 severe t'storm risk is in place across portions of Northern and Central Illinois, from early this afternoon through early tonight. Isolated severe t'storms will be possible, posing a risk of damaging winds, hail and an isolated tornado. 
JP
(11:45PM Sat, March 25th 2023) A storm system will move through the region Sunday, bringing the potential for severe t'storms to portions of the state.
Timing... •Midday Sunday - Early Sunday night, March 26th. Location... •Northern & Central Illinois. Impacts... •A level 1 severe t'storm risk is in place across portions of Northern and Central Illinois, from midday Sunday through early Sunday night. Isolated severe t'storms will be possible, posing a risk of damaging winds, hail and an isolated tornado. 
JP
(1:00AM Sat, March 25th 2023) Early Saturday morning update regarding a storm system that will move through the region through Saturday, bringing several inches of accumulating snow to portions of Northern Illinois. With this update we have increased expected snowfall amounts, based on real time observations and latest weather model guidance information.
Location... •Northern Illinois. Timing... •Early Saturday morning - Early Saturday afternoon, March 25th. Impacts... •Precipitation has developed in the form of rain tonight, and is steadily changing to snow. After transition, snow will then continue through much of Saturday morning, before ending by early Saturday afternoon. •Snowfall accumulation of several inches is expected across portions of Northern Illinois, with a sharp southern gradient to the snowfall likely. •Periods of heavy snow will be likely at times. Thundersnow will be possible at times as well. •The weight of the heavy/wet snow, combined with gusty winds, may lead to some instances of tree damage. 
JP
(12:00PM Fri, March 24th 2023) Friday midday update regarding a storm system that will move through the region today into Saturday, bringing the potential for accumulating snow to portions of Northern Illinois.
Location... •Northern Illinois. Timing... •Late tonight/Early Saturday morning - Early Saturday afternoon, March 25th. Impacts... •Precipitation will develop and begin as rain across Northern Illinois, this evening into early tonight. Rain will eventually mix with and change to snow across portions of Northern Illinois overnight tonight. Snow will then continue through much of Saturday morning, before ending early Saturday afternoon. •Snowfall accumulation will range from upwards of <1" to 2-5" across portions of Northern Illinois, with locally higher amounts likely. 
JP
(10:30AM Fri, March 24th 2023) Friday morning update on a storm system that will continue to move through the region, through Saturday. This will bring a few additional periods of rain and t'storms to portions of the state, with continued severe t'storm potential and heavy rain/flood potential across the southern half of the state. With this update we have moved severe t'storm probabilities a bit north for today/tonight across Southern Illinois, and have adjusted the heavy rain/flood forecast a bit based on real time observations.
Timing & Location... •Severe T'storms: -This afternoon - Early tonight, March 24th: Southern Illinois. •Heavy Rain/Flooding: -Thru tonight, March 24th: Central & Southern Illinois. Impacts... •A final round of severe t'storm potential is expected across Southern Illinois, this afternoon through tonight. •Widespread heavy rainfall is expected across portions of the state, especially Southern Illinois, through tonight. Widespread final event rainfall totals upwards of 1.00-5.00" are expected in a corridor across Southern Illinois, with locally higher amounts possible. Localized to widespread flooding is likely.
JP
(11:45PM Thur, March 23rd 2023) A storm system will move through the region Friday into Saturday, bringing the potential for accumulating snow to portions of Northern Illinois.
Location... •Northern Illinois. Timing... •Late Friday night/Early Saturday morning - Early Saturday afternoon afternoon, March 25th. Impacts... •Precipitation will develop and begin as rain across Northern Illinois, Friday evening into early Friday night. Rain will eventually mix with and change to snow across portions of Northern Illinois Friday night. Snow will then continue through much of Saturday morning, before ending early Saturday afternoon. •Snowfall accumulation will range from upwards of <1" to 2-5" across portions of Northern Illinois. 
JP
(11:30PM Thur, March 23rd 2023) Thursday night update on multiple disturbances and a main storm system that will continue to move through the region, through Saturday. This will lead to multiple rounds of rain and t'storms that will traverse the state, with periods of severe t'storm potential and heavy rain/flood potential. Little to no changes were needed to forecasts with this update.
Timing & Location... •Severe T'storms: -Tonight - Friday morning, March 23-24th: Southern Illinois. -Friday afternoon - Early Friday night, March 24th: Southern Illinois. •Heavy Rain/Flooding: -Thru Friday night, March 23-24th: Central & Southern Illinois. Impacts... •Multiple rounds of severe t'storms are possible across portions Southern Illinois, through Friday night. •Widespread heavy rainfall is expected across portions of the state, especially Southern Illinois, through Friday night. Widespread rainfall totals upwards of 1.00-5.00" are expected in a corridor across Southern Illinois, with localized to widespread flooding likely.
JP
(11:00AM Thur, March 23rd 2023) Thursday morning update on multiple disturbances and a main storm system that will move through the region, through Saturday. This will lead to multiple rounds of rain and t'storms that will traverse the state, with periods of severe t'storm potential and heavy rain/flood potential. Little to no changes were needed to forecasts with this update.
Timing & Location... •Severe T'storms: -Late Thursday afternoon - Friday morning, March 23-24th: Southern Illinois. -Friday afternoon - Early Friday night, March 24th: Southern Illinois. •Heavy Rain/Flooding: -Thursday afternoon - Friday night, March 23-24th: Central & Southern Illinois. Impacts... •Multiple rounds of severe t'storm potential is possible across portions of the state, through Friday night. •Widespread heavy rainfall is expected across the state, especially Southern Illinois, through Friday night. Rainfall totals upwards of 1.00-5.00" are expected in a corridor across Southern Illinois, with localized to widespread flooding likely.
JP
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