cyclone77 Posted December 22, 2013 Share Posted December 22, 2013 Getting a mix of light sleet and light freezing rain again. Might be predominately sleet now. Here's a sounding for this area for 00z off the 23z RAP. Illustrates why sleet is mixing in here quite nicely. The BL cold layer is actually pretty thick, extending all the way up close to 850mb. Just enough of a warm layer there to melt/partially melt the snow from above H8, and yet plenty of BL sub-freezing layer to refreeze much of the melted snowflakes. EDIT: I should point out that layer of warm air is thin enough if any kind of heavy precip moved through this area is should quickly switch to snow, at least as long as there's heavy precip. Problem is nothing significant won't be moving in until around midnight, or later. Link to comment Share on other sites More sharing options...
Geos Posted December 22, 2013 Share Posted December 22, 2013 RAP sounding here at 7pm. The sleet falling here tells me the AOA freezing layer is pretty thin. LOT, Romeoville. 600 PM:***Important Update for this Evening- Please Share***As precipitation continues to spread northward this evening, freezing rain is more likely to be the primary precipitation type for areas that are currently below freezing (see comment below this post for a graphic outlining the area). Recent aircraft soundings from aircraft flying out of Rockford and O'Hare feature a significant layer of warm air over 5,000 ft above the surface that will result in precipitation falling mainly as rain, though sleet will likely mix in at times closer to the Wisconsin border, as has been reported in northern Lake County.With temperatures near or below freezing roughly west of a Waukegan to Pontiac line, this will be freezing rain and likely to result in ice accumulations on roads and sidewalks, especially those that are untreated. This includes the Rockford, DeKalb and Dixon areas. If your location is already a few degrees above freezing, it should remain so for the next several hours at least and prevent any icing problems.The anticipated accumulating snow for north central & northwest Illinois and portions of far northeastern Illinois is now not expected to arrive until after midnight.Use extra caution out driving or walking this evening and be prepared to encounter icy conditions on some roadways and sidewalks.We would greatly appreciate reports of icing and sleet this evening if you are experiencing any in your area. Include your location and an estimated ice accumulation if possible. Link to comment Share on other sites More sharing options...
Ottawa Blizzard Posted December 22, 2013 Share Posted December 22, 2013 Just got home. Sidewalks are a sheet of ice. Temperature is -1.2 Celsius. Link to comment Share on other sites More sharing options...
kevlon62 Posted December 22, 2013 Share Posted December 22, 2013 Sleet and zr here. Ice accretion continues on existing coating from last night and earlier today. Bannister is coated with icicles. Had a bit of freezing fog lending a hand today as well. Link to comment Share on other sites More sharing options...
Geos Posted December 22, 2013 Share Posted December 22, 2013 Still getting -IP and borderline -ZR. Ground is frozen, so it's leading to some freezing, even though it is 33°. DKB reporting sleet it seems. Link to comment Share on other sites More sharing options...
cyclone77 Posted December 22, 2013 Share Posted December 22, 2013 Probably 75/25 sleet/frz rain here. The sleet is actually adding some traction to the sidewalks, which have been extremely treacherous the last 36hrs. Link to comment Share on other sites More sharing options...
SchaumburgStormer Posted December 22, 2013 Share Posted December 22, 2013 Still getting -IP and borderline -ZR. Ground is frozen, so it's leading to some freezing, even though it is 33°. DKB reporting sleet it seems. Still at 31, -zr here Link to comment Share on other sites More sharing options...
Geos Posted December 22, 2013 Share Posted December 22, 2013 Still at 31, -zr here Ok, I saw unknown precip on the last obs. and I thought that was IP. Link to comment Share on other sites More sharing options...
SchaumburgStormer Posted December 22, 2013 Share Posted December 22, 2013 Ok, I saw unknown precip on the last obs. and I thought that was IP. Dkb reports anything that is not rain or snow as "unknown" Link to comment Share on other sites More sharing options...
Geos Posted December 22, 2013 Share Posted December 22, 2013 Update from MKX. http://www.crh.noaa.gov/news/display_cmsstory.php?wfo=mkx&storyid=98924&source=0 Link to comment Share on other sites More sharing options...
cyclone77 Posted December 22, 2013 Share Posted December 22, 2013 Pretty cool to see that STL reported some freezing rain around 6pm. They were at 70 degrees yesterday afternoon. Link to comment Share on other sites More sharing options...
roardog Posted December 22, 2013 Share Posted December 22, 2013 Officially at the airport, 28.9°. Some mix here and colder than I think they expected, by a degree or two. Hoping they are wrong on the amount of ice expected for me too.started as all snow here. Looks like almost a half inch or so on the ground. Probably wont stay snow for long though Link to comment Share on other sites More sharing options...
Boogieman Posted December 22, 2013 Share Posted December 22, 2013 It's getting slick... Wife just told me that someone just posted I-75 North is closed north of Flint (Clio) due to major accident. Link to comment Share on other sites More sharing options...
mississaugasnow Posted December 22, 2013 Share Posted December 22, 2013 Have a light glaze now forming on the cars. I see the island has switched over to freezing rain Link to comment Share on other sites More sharing options...
cyclone77 Posted December 22, 2013 Share Posted December 22, 2013 lol @ radar in Missouri. Many of the models showed this happening, so it's no surprise. The vort associated the deformation band is pretty potent though. Link to comment Share on other sites More sharing options...
Jim Marusak Posted December 22, 2013 Share Posted December 22, 2013 just seeing the 00z soundings for KBUF and KDTX. all i can say to the "ice is nice" crowd: this is going to be an extended concert by Robert Van Winkle, wishing it was more like the song "Informer" made by a native North York'er, Darrin Kenneth O'Brien. and the ones upstream in springfield MO and Lincoln, IL aren't much better looking. http://www.spc.noaa.gov/exper/soundings/13122200_OBS/BUF.gif http://www.spc.noaa.gov/exper/soundings/13122200_OBS/DTX.gif http://www.spc.noaa.gov/exper/soundings/13122200_OBS/ILX.gif http://www.spc.noaa.gov/exper/soundings/13122200_OBS/SGF.gif Link to comment Share on other sites More sharing options...
Brewers Posted December 22, 2013 Share Posted December 22, 2013 Actually seeing some light snow at the moment Link to comment Share on other sites More sharing options...
Geos Posted December 22, 2013 Share Posted December 22, 2013 Actually seeing some light snow at the moment In Racine? Awesome. 850's are cooling. Warm nose is being shoved back. Link to comment Share on other sites More sharing options...
SchaumburgStormer Posted December 22, 2013 Share Posted December 22, 2013 lol @ radar in Missouri. Many of the models showed this happening, so it's no surprise. The vort associated the deformation band is pretty potent though. Dry trend is pronounced Link to comment Share on other sites More sharing options...
YHM Supercell Posted December 22, 2013 Share Posted December 22, 2013 Nice glaze on trees and powerlines here on the west mountain of Hamilton. Side roads are slick as well as sidewalks. Link to comment Share on other sites More sharing options...
Thundersnow12 Posted December 22, 2013 Share Posted December 22, 2013 Meanwhile in Great Bend, KS...from a SPC met. Link to comment Share on other sites More sharing options...
Ottawa Blizzard Posted December 22, 2013 Share Posted December 22, 2013 What time is the heaviest precip supposed to arrive in Toronto? 11 pm? Link to comment Share on other sites More sharing options...
Stevo6899 Posted December 22, 2013 Share Posted December 22, 2013 cold rain here all day just north of 59 here in macomb. Rare to get in perfect placement for moisture like this in SE MI so its brutal to see it go to waste on rain... Link to comment Share on other sites More sharing options...
Justin Posted December 22, 2013 Share Posted December 22, 2013 all snow since about 650pm here... nothing tremendously heavy or anything, started as pingers around 610ish... Link to comment Share on other sites More sharing options...
madwx Posted December 22, 2013 Share Posted December 22, 2013 The deformation band seems like it is gonna take longer than expected to get into Wisconsin, nothing much going on east of the Missouri River. Although there definitely appear to be some convective elements with it in Kansas. Would explain that heavy snow report in Great Bend, KS. Link to comment Share on other sites More sharing options...
kab2791 Posted December 22, 2013 Share Posted December 22, 2013 Interesting gravity wave type feature earlier around Ann Arbor... Link to comment Share on other sites More sharing options...
Brewers Posted December 22, 2013 Share Posted December 22, 2013 In Racine? Awesome. 850's are cooling. Warm nose is being shoved back. Yeah might be some rain mixed in. 850 and 925mb are already below freezing, we just have to deal with this pesky above freezing surface layer. Link to comment Share on other sites More sharing options...
cyclone77 Posted December 22, 2013 Share Posted December 22, 2013 all snow since about 650pm here... nothing tremendously heavy or anything, started as pingers around 610ish... Nice. Just seen that it started snowing at DVN per fb about 10min ago. Still light sleet here. Link to comment Share on other sites More sharing options...
Chicago WX Posted December 22, 2013 Share Posted December 22, 2013 Meanwhile in Great Bend, KS...from a SPC met. 4" in a half an hour. Hmmm... Link to comment Share on other sites More sharing options...
WxMidwest Posted December 22, 2013 Share Posted December 22, 2013 Precip changing from ZR to PL here in NW Rockford.. Link to comment Share on other sites More sharing options...
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