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(10:00PM - 1/5/22) A storm system will move through the region tonight through thursday. This storm system is expected to produce a swath of accumulating snow across Southern Illinois on Thursday.
Summary... A storm system will move from the Plains tonight, through the Lower-Mississippi Valley Thursday morning, and then into the Mid-Atlantic by Thursday evening. This storm system is expected to bring a swath of accumulating snow across Southern Illinois, Thursday morning through Thursday afternoon.
Forecast...
An area of snow will spread across portions of Southern Illinois early Thursday morning. Snow of varying intensity will then continue though the morning and afternoon, before ending by late afternoon. Snowfall totals upwards of 1-3" are expected across portions of Southern Illinois. Below is the snowfall forecast for this snow event. 
JP
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(9:00PM - 1/4/22) A storm system moving through the region will bring a period of high winds to portions of the state and region, tonight through Wednesday afternoon.
Summary... A storm system is strengthening as it moves through the Midwest tonight, and then through the Great Lakes on Thursday. This storm system will bring a period of high winds to portions of the state and region, tonight through Wednesday afternoon. Little to no changes were needed with this update, as the going forecast is on track.
Forecast...
A storm system moving through the region tonight through Wednesday will bring a period of high winds to the state, tonight through Wednesday afternoon. High winds aloft, characterized by a low level jet (850MB) of upwards to 50-65KT and a 500MB jet streak of 100-115KT, will be in place. Adequate mixing is anticipated at least up to 900MB, along with strong cold air advection, which will aide in transporting higher winds to the surface. During this period, wind gusts of 35-50MPH are expected across Northern and Central Illinois. Below is the high wind forecast for this event. 
JP
(8:00PM - 1/3/22) 2021 has come to a close, another active year in weather. One aspect that stands out of note from 2021 is temperatures. 2021 will go down as one of the top 10 warmest years on record for Chicago, Rockford and Moline.
For Chicago 2021 was tied for the 5th warmest year on record, tied with 2020 for that mark. This warm mark was attained with the help of the 7th warmest spring on record, the 8th warmest summer on record and the 8th warmest fall on record. In Rockford, 2021 was the 4th warmest year in record. This warm mark was attained with the help of the 5th warmest spring on record, the 5th warmest summer on record and the 8th warmest fall on record. Lastly, for Moline 2021 was the 9th warmest year on record. This warm mark was attained with the help of the 12th warmest summer on record and the 6th warmest fall on record. 
JP
(11:30AM - 1/4/22) A storm system moving through the region will bring a period of high winds to portions of the state and region, tonight through Wednesday afternoon.
Summary... A storm system will strengthen as it moves from the Plains today, through the Midwest tonight, and then through the Great Lakes on Thursday. This storm system will bring a period of high winds to portions of the state and region, tonight through Wednesday afternoon.
Forecast...
A storm system moving through the region today through Wednesday will bring a period of high winds to the state, tonight through Wednesday afternoon. High winds aloft, characterized by a low level jet (850MB) of upwards to 50-65KT and a 500MB jet streak of 100-115KT, will be in place. Adequate mixing is anticipated at least up to 900MB, along with strong cold air advection, which will aide in transporting higher winds to the surface. During this period, wind gusts of 35-50MPH are expected across Northern and Central Illinois. Below is the high wind forecast for this event. 
JP
(8:00PM - 1/3/22) The 2021/2022 snowfall season started off slow and late for many across Northern and Central Illinois. Prior to the past week or so, much of Northern and Central Illinois had seen little to no accumulating snow, let alone much in the way of any flakes falling from the sky. However, over the past week or so the pattern shifted to being more favorable for cold and snow, which brought a few accumulating snowfalls to Northern and Central Illinois between Christmas and New Years. These accumulated snowfalls impacted cities such as Chicago, Peoria and Springfield...all of which saw their first measurable snow on the season.
Chicago set a new record for the latest measurable snowfall on record, with the first snowfall this season on Dec 28th. This new record date beat the previous record of Dec 20th (2012) by 8 days. For Peoria and Springfield, accumulating snowfall has also occurred over the past week. While not records, Peoria and Springfield did attain a mark of top 5 latest measurable snowfall on record for this season. 
JP
(10:30AM - 1/1/22) A winter storm will move through the region today, impacting the state and region. This winter storm will produce a swath of accumulating snow across the northern half of the state, with mixed precipitation across Central Illinois.
Summary... A storm system will move from the Plains this morning, through the Mid-Mississippi Valley and Ohio Valley this afternoon into tonight, and then into the Northeast by Sunday morning. This storm system will bring a swath of accumulating snow across the northern half of the state, this morning through late tonight and early Sunday morning. A transition zone with mixed precipitation will set up across Central Illinois. Additionally, lake enhancement/lake effect snow will be likely across Northeast Illinois during this time as well. With this update with have increased snowfall amounts across portions of Western Illinois, as well as near Lake Michigan in portions of Northeast Illinois. Additionally, we had adjusted gradients on either side of the main snowfall axis based on real time observations and latest model data. It should be noted that even though the storm system has begun, model guidance is still in a bit of disagreement regarding a few things. We will continue to watch real time observations, and will provide further updates if needed.
Forecast...
Precipitation has spread northeastward across Northern and Central Illinois this morning. Across the northern half of the state, precipitation will be all snow for the duration of this winter storm. Snow is expected across the northern half of the state from the onset this morning, through this afternoon and evening, before ending with time tonight or early Sunday morning. Snow will be moderate to heavy at times, with snowfall rates up to or in excess of 1" per hour at times, especially late this morning through this evening. Lake enhanced/lake effect snow is also expected across Northeast Illinois, which will add to snowfall totals for that area. Additionally, wind gusts of 20-40MPH can be expected as well, which could cause some blowing and drifting of snow. Further south across Central Illinois, while portions of the area may stay as all snow for the duration of the winter storm, a transition zone will set up up across Central Illinois. Along this transition zone; a mix of snow, sleet, freezing rain and rain will be possible. Minor accumulations of sleet and ice will be possible, in addition to some snowfall accumulation. Even further south across the southern half of the state, precipitation will come in the form of rain and t'storms...However, at this time no severe weather threat is expected. Snowfall totals upwards of 2-5" to 4-7" are expected across much of the northern half of the state, with snowfall total of 6-9" expected across far Western Illinois. Across Central Illinois, where the wintry precipitation transition zone will set-up, snowfall totals may vary greatly over short distances and will be nonuniform...As well as there being the likelihood for minor freezing rain and sleet accumulation. Below is the snowfall forecast for this winter storm. 
JP
(11:45PM - 12/31/21) A winter storm is expected to move through the region on Saturday. This winter storm is expected to produce a swath of accumulating snow across the northern half of the state, with mixed precipitation across Central Illinois.
Summary... A storm system will move from the Plains on Saturday morning, through the Mid-Mississippi Valley and Ohio Valley Saturday afternoon into Saturday night, and then into the Northeast by Sunday morning. This storm system is expected to bring a swath of accumulating snow across the northern half of the state, Saturday morning through Sunday morning. A transition zone with mixed precipitation is expected to set up across Central Illinois. Additionally, lake enhancement/lake effect snow will be likely across Northeast Illinois during this time as well. With this update no significant changes were needed, as the going forecast looks good based on current information. At this time there continues to be some disagreement within model guidance, which will be resolved in the next 12 hours leading up to the winter storm. Stay tuned for future updates.
Forecast...
Precipitation is expected to spread northeastward across Northern and Central Illinois Saturday morning. Across the northern half of the state, precipitation is expected be be all snow for the duration of this winter storm. Snow is expected across the northern half of the state from the onset Saturday morning, through Saturday afternoon and evening, before ending with time Saturday night or early Sunday morning. Snow will be moderate to heavy at times, with snowfall rates up to or in excess of 1" per hour at times, especially Saturday afternoon and evening. Lake enhanced/lake effect snow will also be possible across Northeast Illinois, which could add to snowfall totals for that area. Additionally, wind gusts of 20-40MPH can be expected as well, which could cause some blowing and drifting of snow. Further south across Central Illinois, while portions of the area may stay as all snow for the duration of the winter storm, a transition zone is likely to set up across Central Illinois. Along this transition zone; a mix of snow, sleet, freezing rain and rain will be possible. Minor accumulations of each wintry precipitation type will be possible. Even further south across the southern half of the state, precipitation will come in the form of rain and t'storms...However, at this time no severe weather threat is expected. Snowfall totals upwards of 2-5" to 4-7" are expected across much of the northern half of the state. Across Central Illinois, where the wintry precipitation transition zone will set-up, snowfall totals may vary greatly over short distances and be nonuniform...As well as there being the potential or minor freezing rain and sleet accumulation. Below is the snowfall forecast for this winter storm. 
JP
(11:45AM - 12/31/21) A winter storm is expected to move through the region on Saturday. This winter storm is expected to produce a swath of accumulating snow across the northern half of the state.
Summary... A storm system will move from the Plains on Saturday morning, through the Mid-Mississippi Valley and Ohio Valley Saturday afternoon into Saturday night, and then into the Northeast by Sunday morning. This storm system is expected to bring a swath of accumulating snow across the northern half of the state, Saturday morning through Sunday morning. Additionally, lake enhancement/lake effect snow will be likely across Northeast Illinois during this time as well. With this update no significant changes were needed, as the going forecast looks good based on current information. At this time there continues to be some disagreement within model guidance, which will be resolved in the next 18 to 24 hours leading up to the winter storm. Stay tuned for future updates.
Forecast...
Precipitation is expected to spread northeastward across Northern and Central Illinois Saturday morning. Across the northern half of the state, precipitation is expected be be all snow for the duration of this winter storm. Snow is expected across the northern half of the state from the onset Saturday morning, through Saturday afternoon and evening, before ending with time Saturday night or early Sunday morning. Snow will be moderate to heavy at times, with snowfall rates up to or in excess of 1" per hour at times, especially Saturday afternoon and evening. Lake enhanced/lake effect snow will also be possible across Northeast Illinois, which could add to snowfall totals for that area. Additionally, wind gusts of 20-40MPH can be expected as well, which could cause some blowing and drifting of snow. Further south across Central Illinois, while portions of the area may stay as all snow for the duration of the winter storm, a transition zone is likely to set up across Central Illinois. Along this transition zone; a mix of snow, sleet, freezing rain and rain will be possible. Minor accumulations of each wintry precipitation type will be possible. Even further south across the southern half of the state, precipitation will come in the form of rain and t'storms...However, at this time no severe weather threat is expected. Snowfall totals upwards of 2-5" to 4-7" are expected across much of the northern half of the state. Across Central Illinois, where the wintry precipitation transition zone will set-up, snowfall totals may vary greatly over short distances and be nonuniform...As well as there being the potential or minor freezing rain and sleet accumulation. Below is the snowfall forecast for this winter storm. 
JP
(10:45PM - 12/30/21) A winter storm is expected to move through the region on Saturday. This winter storm is expected to produce a swath of accumulating snow across the northern half of the state.
Summary... A storm system will move from the Plains on Saturday morning, through the Mid-Mississippi Valley and Ohio Valley Saturday afternoon into Saturday night, and then into the Northeast by Sunday morning. This storm system is expected to bring a swath of accumulating snow across the northern half of the state, Saturday morning through Sunday morning. Additionally, lake enhancement/lake effect snow will be likely across Northeast Illinois during this time as well. Over the past several days model guidance has been honing in on the potential for a winter storm to affect the region and state this weekend. With time model guidance has honed in on things, and has come into fairly good agreement regarding track and strength of the storm system, along with positioning of the snowfall axis and snowfall amounts. However, it should be noted there is still some disagreement within model guidance, which will be resolved in the next two days leading up to the winter storm. Stay tuned for future updates. With this update no significant changes were needed, as the going forecast fits with the newest information coming in.
Forecast...
Precipitation is expected to spread northeastward across Northern and Central Illinois Saturday morning. Across the northern half of the state, precipitation is expected be be all snow for the duration of this winter storm. Snow is expected across the northern half of the state from the onset Saturday morning, through Saturday afternoon and evening, before ending with time Saturday night or early Sunday morning. Snow will be moderate to heavy at times, with snowfall rates up to or in excess of 1" per hour at times, especially Saturday afternoon and evening. Lake enhanced/lake effect snow will also be possible across Northeast Illinois, which could add to snowfall totals for that area. Additionally, wind gusts of 20-40MPH can be expected as well, which could cause some blowing and drifting of snow. Further south across Central Illinois, while portions of the area may stay as all snow for the duration of the winter storm, a transition zone is likely to set up across Central Illinois. Along this transition zone; a mix of snow, sleet, freezing rain and rain will be possible. Minor accumulations of each wintry precipitation type will be possible. Even further south across the southern half of the state, precipitation will come in the form of rain and t'storms...However, at this time no severe weather threat is expected. Snowfall totals upwards of 2-5" to 4-7" are expected across much of the northern half of the state. Across Central Illinois, where the wintry precipitation transition zone will set-up, snowfall totals may vary greatly over short distances and be nonuniform...As well as there being the potential or minor freezing rain and sleet accumulation. Below is the snowfall forecast for this winter storm. 
JP
(11:45AM - 12/30/21) A winter storm is expected to move through the region on Saturday. This winter storm is expected to produce a swath of accumulating snow across the northern half of the state.
Summary... A storm system will move from the Plains on Saturday morning, through the Mid-Mississippi Valley and Ohio Valley Saturday afternoon into Saturday night, and then into the Northeast by Sunday morning. This storm system is expected to bring a swath of accumulating snow across the northern half of the state, Saturday morning through Sunday morning. Additionally, lake enhancement/lake effect snow will be likely across Northeast Illinois during this time as well. Over the past several days model guidance has been honing in on the potential for a winter storm to affect the region and state this weekend. With time model guidance has honed in on things, and has come into fairly good agreement regarding track and strength of the storm system, along with positioning of the snowfall axis and snowfall amounts. However, it should be noted there is still some disagreement within model guidance, which will be resolved int he next two days leading up to the winter storm. Stay tuned for future updates.
Forecast...
Precipitation is expected to spread northeastward across Northern and Central Illinois Saturday morning. Across the northern half of the state, precipitation is expected be be all snow for the duration of this winter storm. Snow is expected across the northern half of the state from the onset Saturday morning, through Saturday afternoon and evening, before ending with time Saturday night or early Sunday morning. Snow will be moderate to heavy at times, with snowfall rates up to or in excess of 1" per hour at times, especially Saturday afternoon and evening. Lake enhanced/lake effect snow will also be possible across Northeast Illinois, which could add to snowfall totals for that area. Additionally, wind gusts of 20-40MPH can be expected as well, which could cause some blowing and drifting of snow. Further south across Central Illinois, while portions of the area may stay as all snow for the duration of the winter storm, a transition zone is likely to set up across Central Illinois. Along this transition zone; a mix of snow, sleet, freezing rain and rain will be possible. Minor accumulations of each wintry precipitation type will be possible. Even further south across the southern half of the state, precipitation will come in the form of rain and t'storms...However, at this time no severe weather threat is expected. Snowfall totals upwards of 2-5" to 4-7" are expected across much of the northern half of the state. Across Central Illinois, where the wintry precipitation transition zone will set-up, snowfall totals may vary greatly over short distances and be nonuniform...As well as there being the potential or minor freezing rain and sleet accumulation. Below is the snowfall forecast for this winter storm. 
JP
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