ILSNOW

12z GFS with a 985 at south tip of lake michigan at 87 hours a step in the right direction nice hit for northwestern areas

84hr 12z NAM showing a small refresher before the vortex visits.

Had about 3 inches since 8am. Still snowing.

KLOT Update .UPDATE... 1042 AM CST Periods of snow will continue this afternoon, before winding down this evening, especially over northeastern IL and northwestern IN. With this in mind, we currently do not plan any changes to the going head lines, though admittedly we may be able to drop our western counties across north central IL out of the warning in the next few hours. Water vapor imagery late this morning shows the center of the mid-level system now over parts of northern IN. To the north and northwest of this feature, we will continue to experience isentropic upglide and even some enhanced areas of mid-level frontogenesis in associated with the TROWAL airstream. This looks to be the most impactful over eastern sections of the area (especially east of the Fox Valley). This in combination with some lake enhancement over parts of far northeastern IL could result in additional snow amounts in the 1 to 4 inch range before it ends areawide this evening. The highest amounts are expected near the lake, with lighter amounts well inland over northern IL. Overall, this is likely to push storm totals to around, or even a bit above, a foot over at least portions of far northeastern IL into northwestern IN, with amounts closer to the 7 to 10 inch range over the western suburbs.

KLOT Aviation nice writeup by Ricky AVIATION... For the 12Z TAFs... 608 AM CST The concerns include: * Ongoing snow with lake enhanced snow likely to occur mid to late morning through early evening, with at least temporary 3/4SM VSBY likely and 1/2SM VSBY possible, accompanied by 006-008 CIGs * Gusty northeast winds continuing, with gusts up to 30 kt possible this afternoon Slow moving low pressure will continue to bring waves of snow into or through this evening at the TAF sites. RFD will be on the northwest periphery and see mainly lighter snow. The Chicago area terminals are in a temporary lull early this morning, however forcing is expected to increase during the mid to late morning with lake enhancement to the snow all the way through the early evening. At least temporary 3/4SM VSBY appears likely during this activity, with at least brief 1/2SM VSBY quite possible. This is based off upstream observations over southeast Wisconsin where the lake enhanced snow is currently located paired with favorable forecast soundings. The 12z TAF has prevailing 1SM VSBY, but it`s possible a period of prevailing lower VSBY occurs. The most favored time for potential prevailing sub 1SM and occasional 1/2SM VSBY is this afternoon. Another item of note during this afternoon window of potential moderate snow is an increase in northeast wind gusts up to 25-30 kt. The snow should finally wind down by early to mid evening and largely come to an end by 06z, except maybe a bit longer for GYY. Additional snowfall accumulations will be up to 2-4" of fluffier snow than last night, with 1-3" at DPA and up to 1" at RFD. IFR to lower end MVFR CIGs early this morning should build back down to IFR in 006-008 range with lake enhancement, then improve after the snow ends this evening. MVFR CIGs then look to prevail through at least Monday morning. Castro

8 here as of 6am

Ohare @11pm OHARE HVY SNOW 30 27 88 E18G26 29.84F VSB 1/4 WCI 18

little over 3 in buffalo grove as of 10pm

Just out with the puppy would call it light snow and it is windy at this point it is not a wet snow.

that is a definite issue here now after the initial burst

Same here

Snow has begun

KLOT staying with 5-9 here while Milwaukee bumped up their southeast zones to 7-10.

18z HRRR dropping 16-17 inches in lake county near lake michigan no way its right but can always dream. It was way to high for the last storm with additional lake enhancement/lake effect.

12z ukie precip

12z NAM

ukie

GFSv16 nice and wet basically 1 inch+ area wide Kuchera 10:1

as is our favorite wet model the 0z GFSv16 thru 36 hours

you buy it or toss it?

18z 0z

They fixed it

At first i thought the 8-12 map was from early but it is time stamped 3:20 CST. No where in the forecast discussion or zone forecasts does it state 8-12. Has to be wrong .

I will take ARN3 please

KLOT updated map