Chinook

If you are a fan of the NOAA-ESRL calculation of the NAO, this is about the most negative combination you can get with the NAO and AO.

Looks like Chicago O'Hare had 1/2 mile visibility for only 2 hrs (2 Metars total), along with 40-41 kt peak wind gusts. They had 3/4 mile visibility and -SN at other times. KORD 260651Z 01033G40KT 1/2SM R10L/4500V6000FT SN FG VV007 01/00 A2958 RMK AO2 PK WND 02040/0650 SLP023 SNINCR 1/4 P0001 T00060000 $ KORD 260551Z COR 02024G35KT 1/2SM R10L/5500VP6000FT SN FG VV007 01/01 A2958 RMK AO2 PK WND 03041/0530 SLP022 P0002 60029 4/003 T00060006 10028 20006 400440006 56015 $

Hoosier - scattered purple is on your way

Best guess might be look for Chicago NWS on twitter (thundersnow, short video), Spann on twitter (retweet of short thundersnow), search #ilwx or #iawx.

chicago-west area obs shows snow, snow, sleet, rain, rain, nothing, nothing, nothing, nothing

Muscatine wind gusts are much higher than surrounding stations. Equipment problem?

Macomb IL has 32 degrees and rain. Shouldn't that be reported as freezing rain?

I posted a Euro image like this 6 or 7 days ago -- and a rather serious storm did develop today. The 500mb is quite as closed off today as that particular run of the Euro 6 or 7 days ago, but it did sniff out a major low pressure in the region. Now, look at this for next Saturday. The Euro precip shows rain in MO and snow for Nebraska and north KS.

Did you jump up and down and yell "that's thundersnow!!" like Cantore?

Erie IL (cyclone77) is just miles away from the heavy snow band. I wonder if we will see huge difference in the final snow totals near there.

Kansas City airport now has blizzard or near-blizzard conditions KMCI 251829Z 01026G42KT 1/4SM R19R/2200V2600FT SN FZFG OVC008 M01/M02 A2962 RMK AO2 PK WND 01042/1826 P0002 T10111022 KMCI 251809Z 01027G39KT 1/4SM R19R/2200V3000FT SN FZFG SCT007 OVC011 M01/M02 A2961 RMK AO2 PK WND 01042/1758 P0000 T10061017 KMCI 251801Z 01027G42KT 1/2SM R19R/2800V3000FT SN FZFG BKN007 OVC010 M01/M02 A2961 RMK AO2 PK WND 01042/1758 P0000 T10061017 KMCI 251755Z 01028G42KT 1/4SM R19R/2800V3500FT SN FZFG SCT006 OVC010 M01/M02 A2961 RMK AO2 PK WND 36036/1754 P0000 T10061017 KMCI 251753Z 36025G42KT 1/2SM R19R/2800V3500FT SN FZFG BKN006 OVC010 M01/M02 A2961 RMK AO2 PK WND 02042/1747 SLP031 931003 P0010 60027 T10061017 10050 21006 50005 KMCI 251739Z 01021G34KT 1/2SM R19R/2600V3500FT SN FG BKN006 OVC010 00/M01 A2961 RMK AO2 PK WND 02036/1719 P0008 T00001011 KMCI 251725Z 01021G36KT 1/4SM R19R/2200V2800FT +SN FG BKN006 OVC010 00/M01 A2962 RMK AO2 PK WND 02036/1719 P0006 T00001011

FZRA at Davenport. I wonder if it is coming down really hard.

My area has finally gotten some snowflakes now, with wind gusts of 25mph up to even 50mph at the airport. Some snow developed in Wyoming, and it moved southwards. Right now, Cheyenne has heavy snow and 51mph wind gusts. CYS weather office issued a "snow squall warning," one of the new types of warnings that can be issued. Most of yesterday was windy and sunny, about 52, with wind gusts up to about 45mph. Today was cloudy, with temps in the 40's and wind gusts of 25mph+ during the daytime. an eagle's talon -- 21:30z (2:30PM)

The storm is starting to get going now in Nebraska and South Dakota. There are some bursts of convective snow around Rapid City right now, but it doesn't relate much to the GL/OV forum.

Well, you could go 3.42 years without a tornado watch, as DTX has.

Yes, this breaks a streak for Kansas City CWA. # of days since winter storm warning, as of yesterday, 11/23

This possible snow scenario in IA reminds me of when I drove across that area go to my parents in Ohio for Christmas in 2012. Des Moines had a 12" snowstorm before I went through. I saw dozens of tire tracks in the snow and several abandoned cars and trucks off the road. Based on this, my guess is that the most likely type of off-the-road accident in slippery conditions is when you fishtail and your car lands backwards (rotated about 180 degrees or 200 degrees) as you slide off the side or into the median grass.

GOES-17 preliminary non-operational West Coast views https://www.aos.wisc.edu/weather/wx_obs/GOES17.html

West Coast areas and intermountain West areas will get a major boost in rainfall and snowpack in the next 1-2 weeks. Even the 1-week QPF from the NWS/WPC is looking very wet for the Pac NW and northwest California. Currently snowpack is very low outside of CO, WY, and MT.

Pretty much everything but the 12z GFS has had decent values of snow at Des Moines. So if you're in Des Moines, maybe get ready for some pre-December shoveling.

The latest Euro shows the snow a little bit east of yesterday. It has some 6-10" of snow near Davenport, but none for Chicago

This 00z GFS runs lays down a lot of snow for the Midwest in general.

GOES-17 has been moved to its western orbit at 137.2 deg W longitude. Quote from NOAA:

The latest Euro says this storm cuts off as it forms in Colorado and Kansas. The QPF shows heavy snow in Kansas and Nebraska, like 1.2" water equivalent of snow at Goodland KS. It will be interesting to see if this type of extreme is shown if we get this storm within 72-96 hours. Right now, it's 6.5 days out, essentially.

Just as a reminder, http://weather.us still has free ECMWF maps, including QPF/snow-water QPF. (no snow ratio) You can zoom in on every US state. It also has the UKMET (shown as Global Britain Standard) with fairly basic information.