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(6:00AM - 11/13/19) A weak and fast moving disturbance moving through the region will bring the chance for a bit of snow to portions of the state, this afternoon into tonight.
A period of light snow will be possible across portions of Northern Illinois, late this afternoon into tonight. This snow will be associated with a weak and fast moving disturbance pushing through the region. Overnight model guidance has shifted slightly south with this “event”, thus have expanded snow potential a bit with this update. This will be a nuisance event, with just minor snow accumulation of a dusting is possible across portions of Northern Illinois. Below is the TAM snowfall forecast for this event. 
JP
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(9:45PM - 11/12/19) A weak and fast moving disturbance moving through the region will bring the chance for a bit of snow to portions of the state, Wednesday afternoon into night.
A period of light snow will be possible across portions of Northern Illinois, Wednesday afternoon into Wednesday night. This snow will be associated with a weak and fast moving disturbance pushing through the region. This will be a nuisance event, with just minor snow accumulation of a dusting is possible across far Northwest and far Northern Illinois. Below is the TAM snowfall forecast for this event. 
JP
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Over the last several days, model guidance has been going back and forth on the handling of a weather disturbance coming out of Montana late tonight and eventually into the Midwest by tomorrow night, as you can see in the loop below. Even at this stage of the game there remains differences but the possibility will be there for some light snow accumulations across portions of northern Illinois tomorrow night/overnight. More details below.....
An area of precipitation looks to organize initially to our west tomorrow afternoon associated with a broad area of low pressure. It is then forecast to streak eastward into the Midwest, including portions of northern Illinois as some latest model guidance is showing. This will not be a big deal snow event but could lay down some light accumulations up to an inch in spots as it looks now with the heavier amounts north of the Wisconsin border.
Like previously stated, this doesn't look to be a big deal by any means but light accumulations will be possible and we will continue to update this forecast as new model guidance comes in.
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(2:00PM - 11/12/19) Post storm wrap up regarding the recent Sun-Mon, November 10-11th Veterans Day snowstorm that affected the state. This ended up being the biggest snowfall on record for Veterans Day, for many areas across the state.
This storm system produced widespread snow accumulation across the state, with several inches for some area. Snow first started across Northern Illinois early Sunday night, continuing into late Monday morning and early Monday afternoon. Snow spread across Central Illinois from early Monday morning through late Monday afternoon. Across Southern Illinois precipitation started as rain, before changing to snow during Monday afternoon and then continuing into Monday evening. At times moderate snow with upwards of 1"/hour snowfall rates occurred. Final snowfall totals across Central and Southern Illinois were generally in the 1-3" range, though a few isolated higher amounts occurred. The main axis of heavier snow accumulation was across Northern Illinois, where generally 3-6" fell. Below is a map representation of final snowfall totals across the state and adjacent areas. 
This snowstorm also ended up shattering snowfall records for Veterans Day across the state, making it the biggest Veterans Day snowfall on record for many areas. A list of cities and associated new/old records is below.
New records in bold/italics. .....Chicago..... Snowiest Veterans Day... New: 3.4" - 2019/Old: 1.9" - 1995 .....Rockford..... Snowiest Veterans Day... New: 3.2" - 2019/Old: 1.6" - 1995 .....Dubuque..... Snowiest Veterans Day... New: 3.3" - 2019/Old: 1.4" - 1921/1913 .....Moline..... Snowiest Veterans Day... New: 3.5" - 2019/Old: 2.4" - 1921 .....Peoria..... Snowiest Veterans Day: 3.0" - 1921 (1.8" - 2019 2nd biggest) .....Springfield..... Snowiest Veterans Day... New: 4.7" - 2019/Old: 1.2" - 1995 .....Lincoln..... Snowiest Veterans Day... New: 2.5" - 2019/Old: 0.5" - 2013/1986 .....St. Louis..... Snowiest Veterans Day... New: 1.5" - 2019/Old: 1.0" - 1911 .....Paducah..... Snowiest Veterans Day... New: 1.2" - 2019/Old: T - 1995/1976/1968
JP
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Well it is here! The record cold temperatures that we have been talking about for a week now arrived into the region and into Illinois late tonight and early this morning and are here to stay through the day, potentially into tomorrow morning as well. Looking at several sites across Illinois earlier this morning as a recap of some records, both Rockford and Chicago (O'hare Airport) set record lows. O'hare got down to 7 degrees breaking the previous record of 8 set in 1986 and Rockford got down to 3 degrees this morning which breaks the previous record of 7 set in 1986. Further downstate, Quincy, IL dropped to 5 degrees which breaks the previous record of 10 degrees also set in 1986 and St Louis got down to 11 degrees, breaking the previous record of 12 degrees set in 1911.
Looking at some select areas across the state, here is what were the lowest wind chill values were. This is from the northern Illinois area.
This is from the northwest and western Illinois area showing earlier morning low temperatures and wind chill values.
The Quad Cities National Weather Service office got down to nearly 5 degrees below zero this morning, located just on the other side of the Mississippi River.
Looking across central Illinois, here are more low temperatures this morning and what wind chills were at 7am.
Temperatures have come up some so far early this afternoon but still much of the state is still in the low to mid teens and these will not rise much more today outside of a few more degrees. More areas will also break their record low max record with such daytime highs this afternoon. Like previously mentioned, the record low max at O'hare is 28 degrees and it is only 14 degrees there, most likely remaining in the upper teens, shattering that record.
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A meteor shower is underway across the continental United States this evening. Most of the snow has moved away from the state and we have some good viewing conditions to see some meteors associated with the Taurid meteor shower. Information from the Denver Post on some of the meteors you may witness tonight is found below!
“Fireballs are meteors that appear brighter than normal,” according to a post on the International Meteor Organization’s website. “A great majority of the material orbiting in outer space are tiny sub-millimeter sized bits of stone, ice, or metal, or a combination of these materials. These are known as micrometeoroids or simply space dust. These tiny fragments cannot produce enough light to be seen when encountering the atmosphere and yet they contribute many tons of material to the Earth’s weight each year. “As the size of these objects approach a millimeter, they begin to produce enough light to be seen upon entry to the upper atmosphere as ordinary meteors,” the International Meteor Organization reported. “Due to the velocity at which they strike the Earth’s atmosphere, fragments larger than 1 millimeter have the capability to produce a bright flash as they streak through the heavens above. These bright meteors are what we call fireballs, and they often strike fear and awe for those who witness them.” 
 HRRR low temps tonight.
(8:30PM - 11/11/19) In the wake of the departing snowstorm, very cold temperatures for early November are settling in across the region. This period will feature record breaking and historic cold for this early in the season/early November.
Cold temperatures ranging from the teens across Northern and Central Illinois to the 20's across Southern Illinois, have settled in this evening. Low temps tonight will range from the low to mid single digits across Northern Illinois to the low to mid teens across Southern Illinois. On Tuesday, high temps will range from the mid-teens across Northern Illinois to the low 20's across Southern Illinois. Low temps Tuesday night will range from the mid to upper single digits across Northern Illinois to the mid teens across Southern Illinois. In additional to the actual air temps, wind chills will reach into the single digits below zero tonight across a good portion of the state, and potentially across portions of Northern and central Illinois Tuesday night.
While this type of cold is nothing out of the ordinary in mid-winter, it is very noteworthy for the time of year. As was mentioned above, this will be record breaking and historic cold for this early in the season/early November. Daily record low max and low temps will be broken across the state during this period. Additionally, these will be the coldest temps that have occurred this early in a season before for many areas...For example, this period will feature the earliest sub 20 degree high and the earliest sub 10 degree low for Chicago on record. Below are a list of cities and records that are in jeopardy during this period. Some of these records will likely be smashed.
.....Chicago..... Nov 11th Record Low: 15 (1950) Nov 12th Record Low Max: 28 (1995) Nov 12th Record Low: 8 (1986) Nov 13th Record Low: 6 (1986) .....Rockford..... Nov 11th Record Low: 10 (1926) Nov 12th Record Low Max: 27 (1940) Nov 12th Record Low: 7 (1986) Nov 13th Record Low: 3 (1986) .....Dubuque..... Nov 11th Record Low: 6 (1986) Nov 12th Record Low Max: 18 (1940) Nov 12th Record Low: 6 (1986) Nov 13th Record Low: 1 (1986) .....Moline..... Nov 11th Record Low: 12 (1950) Nov 12th Record Low Max: 20 (1911) Nov 12th Record Low: 8 (1986) Nov 13th Record Low: 5 (1986) .....Galesburg..... Nov 11th Record Low: 13 (2008) Nov 12th Record Low Max: 24 (1940) Nov 12th Record Low: 8 (1986) Nov 13th Record Low: 4 (1986) .....Peoria..... Nov 11th Record Low: 13 (1995) Nov 12th Record Low Max: 18 (1911) Nov 12th Record Low: 9 (1986) Nov 13th Record Low: 5 (1986)
.....Springfield.....
Nov 11th Record Low: 13 (1995) Nov 12th Record Low Max: 19 (1911) Nov 12th Record Low: 12 (1986/1995) Nov 13th Record Low: 7 (1986) .....Lincoln..... Nov 11th Record Low: 13 (1913) Nov 12th Record Low Max: 29 (1920) Nov 12th Record Low: 10 (1919) Nov 13th Record Low: 5 (1986) .....Champaign..... Nov 11th Record Low: 16 (1995/1950/1913) Nov 12th Record Low Max: 27 (1920) Nov 12th Record Low: 9 (1911) Nov 13th Record Low: 7 (1986) .....Quincy..... Nov 11th Record Low: 12 (1950) Nov 12th Record Low Max: 28 (2014) Nov 12th Record Low: 10 (1986) Nov 13th Record Low: 6 (1986) .....St. Louis..... Nov 11th Record Low: 18 (1976/1950/1911) Nov 12th Record Low Max: 20 (1911) Nov 12th Record Low: 12 (1911) Nov 13th Record Low: 10 (1986) .....Paducah..... Nov 11th Record Low: 18 (1960) Nov 12th Record Low: 21 (1995/1986/1976) Nov 13th Record Low: 10 (1986)
JP
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Well it is finally arriving tomorrow....we have been talking about record cold temperatures on the way for nearly a week now and if you're like me, you have to be excited to shatter some records, right?! Who doesn't like extreme weather? Well that is what we are going to have tomorrow across the Midwest and here in Illinois. I dig into the latest below...
Below is a forecast loop of temperatures from 2pm this afternoon through 7am tomorrow morning. As you can see, temperatures really tank tonight with a good portion of the state getting down into the single digits has high pressure moves into portions of the Midwest, clearing out clouds to the south and east.
Those morning temperatures tomorrow ranging from the mid to upper single digits to mid teens from north to south across Illinois will also mean very cold wind chills with a decent northwest wind still the norm. Wind chill values by 6am tomorrow could be close to below zero for nearly the entire state with the lowest wind chills expected across northern Illinois, thanks to the fresh snow and clear skies helping that area get the coldest.
Below is an image showing forecast high temperatures across the state tomorrow. Again, just using Chicago O'hare Airport (circled in orange) as a reference point, it is entirely possible that the high at O'hare tomorrow is around 19 or 20 degrees and the record low max is 28 degrees so that could be a record not only broken but shattered by 8 or 9 degrees! Elsewhere, it's going to be very cold throughout the state for this time of year when upper 40's to upper 50's are more the norm from north to south across Illinois.
An updated article will be posted later this evening with more stats and records for tomorrow but don't take tomorrow lightly as this is a very very impressive early shot of record cold into the Midwest and Illinois tomorrow with really no warmth in sight. Well below normal temperatures will be the norm heading through the rest of this week.
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(11:00AM - 11/11/19) A snowstorm continues the affect the state this morning, and will continue to through this evening. This is already the biggest Veterans Day snowstorm on record for some areas. A brief short term update...
Snow has been ongoing much of the night and morning across Northern Illinois. 2-5” of snow accumulation has occurred across a good portion of Northern Illinois thus far, generally along and north of I-88. Snow will continue across Northern Illinois through the late morning or early afternoon, slowly ending from west to east. Across Central Illinois, snow overspread much of the area this morning. Snow will continue across this area through late afternoon. Snow will continue across Central Illinois through late afternoon. Across southern Illinois, precip is starting as rain before changing to snow...with snow expected to continue into the evening. The final snowfall accumulation forecast from our previous main update still looks on track...With 2-6" across Northern Illinois, to 1-3" across Central and Southern Illinois. Locally higher amounts are possible. 
JP
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(6:00AM - 11/11/19) A snowstorm continues the affect the state this morning, and will continue to through this evening. This will be the biggest Veterans Day snowstorm on record for some areas. A brief short term update...
Snow has been ongoing much of the night for a good portion of Northern Illinois. 1-4” of snow accumulation has occurred across a good portion of Northern Illinois thus far, generally along and north of I-88. Snow will continue across Northern Illinois through the late morning or early afternoon. Across Central Illinois, snow is beginning to overspread the area this morning. Snow will continue across Central Illinois through late afternoon. Across southern Illinois, precip will begin as rain, before changing to snow this afternoon and continuing into the evening. The final snowfall accumulation forecast from our previous update still looks on track. 
JP
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