Chicago Storm

One big difference in the evolution of this storm system that we are seeing is how the double-barrel SLP/inverted trough feature has played out. Most guidance, as recently as the 0z runs last evening, had the southern SLP becoming dominated as things transitioned across Illinois and Indiana. Instead, we have seen the northern SLP be the dominant one, thus leading to everything having been shifted a bit north so far out this way. As we continue on, it does look like the transition to a most eastern dominant SLP will occur as things continue up into Michigan.

Snowfall totals as of noon… ORD - 4.4” MDW - 5.3” RFD - 4.9” .

That and just looking at current analysis data as well. Not looking good… .

If you’re in NE Illinois or the metro, I would have concerns about a last minute shift north and that the front end thump was the main show…

KORD 121351Z 10024G48KT 1/2SM R10L/3000V3500FT SN FG OVC005 01/00 A2949 RMK AO2 PK WND 09048/1342 SLP991 SNINCR 1/5 P0005 T00060000 .

Some sort of gravity wave type of feature has moved across the metro/NE Illinois, with a brief, but sharp increase in winds. ORD gusted to 55MPH. .

This front end thump has definitely not been of lower ratio. Probably 10:1 ratio, if not a bit higher potentially, as it is blowing around fairly easily. .

Yea, they got it all. .

Stacking at ORD… KORD 121251Z 08018G26KT 1/2SM R10L/3500V5000FT SN FG VV004 00/M01 A2962 RMK AO2 PK WND 07028/1237 PRESFR SLP036 SNINCR 2/4 P0012 T00001006 .

There has been a ton of TSSN south of I-80 the past few hours. .

0z Euro back SE once again. Turning into just an average piece of guidance these days

Give it time...

as it always has been.

It is indeed SE.

This trough feature extending from the main SLP is an interesting development that we've seen gain traction over the past 12-24 hours. It can enhance precip/snowfall. Folks in the Northeast see significant versions, Norlun troughs, that sort of do the same.

alek reeling it in.

18z Euro with the bump NW. Wisconsin gets the goods. up into N-L. Michigan.

I can make this happen. Though, further inland may be more interesting. .

Ya'll are slacking... No 18z GGEM mention?

have been fairly busy unfortunately. would like to have been posting more, but just haven't had the time.

Cautiously optimistic would be the phrase I'd use.

ricky's mind going a thousand miles a minute right now.

that white rain is gonna stack nicely there.

Ricky will tell you the same… Never add up the P+C amounts. .

too bad temps aren’t colder… .