ILSNOW Posted January 26, 2021 Share Posted January 26, 2021 and KLOT nice update from Ricky UPDATE... 1015 PM CST There have been no changes made to the going Winter Storm Warnings and Winter Weather Advisories. However, based off conditions in the pre-dawn hours, the midnight shift may give consideration to converting some of the warnings over to a Winter Weather Advisory. This is because snowfall rates aside from lake enhancement near Lake Michigan are expected to be mainly light and occasionally moderate on Tuesday. The main message tonight remains hazardous travel due to a variety of winter hazards, snow covered roads, reduced visibility and at least patchy blowing snow in the north due to 30-40 mph northeast wind gusts, and freezing rain and drizzle south. Have overall lowered storm total snowfall a bit to only locally to 6+" inland and highest amounts near Lake Michigan in Illinois at 6-8", maybe a few spots coming in just above 8"+. These changes were reflected in the updated WSW text product. The evolution of our winter system is quite different from just a few days ago, as double or triple barreled weaker low pressure is analyzed from southwest MO to western KY, instead of a stronger low lifting northeast of the Ohio River. Forcing is being driven by weakening, but still certainly sufficient large scale forcing from 500 mb short-wave, along with mesoscale f-gen (thermal gradient) driven forcing at the lower and mid-levels, plus also augmented by convective processes by very steep lapse rates aloft. Trends have been a challenge this evening, as we`ve been fighting pockets of dry air aloft. Most notably, dry air centered around 850 mb was driven into far northern Illinois and southern Wisconsin earlier, which guidance did a fairly poor job of capturing. That dry air finally lost out as snow banding finally pushed north. There`s been some good f-gen driven banding amidst the dry air issues, so reports of nearing 2" have trickled in centered near I-88 and just south. More convective elements have been streaming northward out of central Illinois thanks to aforementioned very steep mid and upper lapse rates sampled by DVN RAOB. The dry air at 500 mb and above is allowing for convection to help fill in some of the dry pockets where snow has been more prevalent and this should be the case north of I-80 for a decent chunk of the overnight. 850 mb warm nose appears it made inroads into our far southern CWA near and south of US-24, while to the north of that varied precip types have been from pockets of saturation amidst some 700 mb drying and above described convection that has brought reports of snow and sleet. This dry layer at 700 mb will shift northward overnight, causing a loss of cloud ice in the DGZ and introducing a concern for some freezing drizzle from I-80 and south into Tuesday morning. It appears that for areas to the north of that up to around I-88 corridor, saturation depth will be to just cold enough at -9 to -11C to keep snow as primary p-type. Steady generally light to moderate snow rates with briefly heavier snow will occur until about 3 or 4 AM, and then expecting the lake enhancement to take hold along the Illinois shore. On Tuesday, the 500 mb and 700 mb circulations will slowly translate across the area, keeping lighter snow going and resulting in light additional accumulations of 1-2/1-3", but higher near lake in IL at up to 2-5". The midnight shift will assess transition to lake effect snow Tuesday night, which should last into Wednesday and add additional accumulations for affected areas. Castro 3 Link to comment Share on other sites More sharing options...
madwx Posted January 26, 2021 Share Posted January 26, 2021 Snow starting here as a wall of 25 dBz reflectivities hit us. Moderate sized flakes right now 2 Link to comment Share on other sites More sharing options...
mimillman Posted January 26, 2021 Share Posted January 26, 2021 2 hours ago, mimillman said: Definitely having the dry air issues previously alluded to but not super concerned yet. I’d be more concerned if it were 11pm and we still had issues Now I’m concerned 3 Link to comment Share on other sites More sharing options...
cyclone77 Posted January 26, 2021 Share Posted January 26, 2021 Just under 4" and still ripping. Getting pretty lucky with this localized enhancement the past hour or two. Winds aren't really too gusty, so not all that much blowing/drifting snow unlike earlier. 2 Link to comment Share on other sites More sharing options...
RCNYILWX Posted January 26, 2021 Share Posted January 26, 2021 For everyone with RadarScope in LOT CWA, use tORD or tMDW Long Range Z while KLOT is down. Sent from my SM-G965U using Tapatalk Link to comment Share on other sites More sharing options...
RCNYILWX Posted January 26, 2021 Share Posted January 26, 2021 Now I’m concerned Filling in better now and maybe lake enhancement starting to kick in. Sent from my SM-G965U using Tapatalk Link to comment Share on other sites More sharing options...
vortex Posted January 26, 2021 Share Posted January 26, 2021 Last few bands were all snow here. Maybe around an inch total. Link to comment Share on other sites More sharing options...
SchaumburgStormer Posted January 26, 2021 Share Posted January 26, 2021 The good bands near @cyclone77 have been weakening a bit but feeding to mby. Steady moderate snow for awhile now 1 Link to comment Share on other sites More sharing options...
hlcater Posted January 26, 2021 Share Posted January 26, 2021 Snow is about to resume in Iowa city. Hopefully these hang around through tomorrow as modeled and add a few more inches. 6” call for CR/IC is looking solid. Link to comment Share on other sites More sharing options...
hawkeye_wx Posted January 26, 2021 Share Posted January 26, 2021 I just went out and could only find a max of 2.8" on any of my snow boards in the back yard. One board only had about 1.8". I hate when it's windy and the snow blows across the yard. We may have actually received a bit more than that, but it has been underwhelming. We've had too many breaks in the snow and had poor rates for the last few hours. Link to comment Share on other sites More sharing options...
cyclone77 Posted January 26, 2021 Share Posted January 26, 2021 Back down to light snow after several hours of steady moderate snow at times with very large flakes. Haven't measured in awhile but guessing over 4" now. HRRR/RAP show another 0.2" of precip by late tomorrow so should hopefully be able to squeeze a few more inches out by then, albeit a much much slower pace than what fell this evening. Link to comment Share on other sites More sharing options...
weathafella Posted January 26, 2021 Share Posted January 26, 2021 Was out for awhile walking. Fatties from the lake mixed with plates in from the synoptic system. Felt like a snowstorm. 2 1 Link to comment Share on other sites More sharing options...
michaelmantis Posted January 26, 2021 Share Posted January 26, 2021 Nicest flakes of this storm (and season) so far. Now just need that dry slot around Joliet to fill in. 2-3 hours of this and I’ll be happy. Will see what the morning brings! 1 Link to comment Share on other sites More sharing options...
hawkeye_wx Posted January 26, 2021 Share Posted January 26, 2021 It continues to be underwhelming here. I've seen nothing but light snow for the last four hours. The brighter radar returns are not verifying at the surface. Link to comment Share on other sites More sharing options...
Hoosier Posted January 26, 2021 Share Posted January 26, 2021 Saw some 14" reports in Nebraska and Iowa. Not sure if there's anything higher to this point. Link to comment Share on other sites More sharing options...
hawkeye_wx Posted January 26, 2021 Share Posted January 26, 2021 Madison is looking pretty good. Plenty of model runs had them getting left out completely. Same goes for Waterloo, IA. 1 Link to comment Share on other sites More sharing options...
tuanis Posted January 26, 2021 Share Posted January 26, 2021 Goodnight y’all. It took until midnight, but it’s finally doing its thing out there. Hope it keeps up while I sleep. Link to comment Share on other sites More sharing options...
cyclone77 Posted January 26, 2021 Share Posted January 26, 2021 1 minute ago, Hoosier said: Saw some 14" reports in Nebraska and Iowa. Not sure if there's anything higher to this point. So much for the 30" in southern IA eh? 4.5" here with snow picking up a bit again. 1 Link to comment Share on other sites More sharing options...
NEILwxbo Posted January 26, 2021 Share Posted January 26, 2021 4.1” at DKB co op station. More than I thought we’d have at this point 3 Link to comment Share on other sites More sharing options...
hawkeye_wx Posted January 26, 2021 Share Posted January 26, 2021 4 minutes ago, NEILwxbo said: 4.1” at DKB co op station. More than I thought we’d have at this point Wow, you have more than I do. Link to comment Share on other sites More sharing options...
NEILwxbo Posted January 26, 2021 Share Posted January 26, 2021 21 minutes ago, hawkeye_wx said: Wow, you have more than I do. Not sure how the hell that happened Link to comment Share on other sites More sharing options...
jcwxguy Posted January 26, 2021 Share Posted January 26, 2021 1 hour ago, Hoosier said: Saw some 14" reports in Nebraska and Iowa. Not sure if there's anything higher to this point. Officially 14.5" at Lincoln airport. My final total 15.2" in far east lincoln 3 Link to comment Share on other sites More sharing options...
weathafella Posted January 26, 2021 Share Posted January 26, 2021 Ripping pretty good in Evanston. Eyeballing 2-3. 1 Link to comment Share on other sites More sharing options...
A-L-E-K Posted January 26, 2021 Share Posted January 26, 2021 Probably 3 ish here 1 Link to comment Share on other sites More sharing options...
IllinoisWedges Posted January 26, 2021 Share Posted January 26, 2021 Weenie band right now. Pound town activated. 1 Link to comment Share on other sites More sharing options...
RCNYILWX Posted January 26, 2021 Share Posted January 26, 2021 Ripping here in southeast Naperville. Huge flakes and legit +SN under this band. Calling it 2.9" now but we're stacking quickly. Just got home from the office, it was freezing drizzle/mist and snow grains when I left there, and the band suddenly blew up near Bolingbrook. 3 Link to comment Share on other sites More sharing options...
Chicago Storm Posted January 26, 2021 Author Share Posted January 26, 2021 Had periods of SN to +SN through the night, and am over 3” here thus far.. Link to comment Share on other sites More sharing options...
Chicago Storm Posted January 26, 2021 Author Share Posted January 26, 2021 Lake enhancement showing up in WI, around Manitowoc and vicinity.. Link to comment Share on other sites More sharing options...
CheeselandSkies Posted January 26, 2021 Share Posted January 26, 2021 3 hours ago, hawkeye_wx said: Madison is looking pretty good. Plenty of model runs had them getting left out completely. Same goes for Waterloo, IA. Felt like a real winter wonderland out there coming into work for the first time in a while. Quite a bit of blowing/drifting going on. Link to comment Share on other sites More sharing options...
A-L-E-K Posted January 26, 2021 Share Posted January 26, 2021 V nice looking cake job, hopefully the lake band doesn't blast through too quick, gonna need some help to hit the call Link to comment Share on other sites More sharing options...
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