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Chicago Storm

Professional Forecaster
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  1. Thought it wasn’t gonna snow till afternoon? Already snowing at Wrigley. .
  2. P-type starting to bounce around here, between rain/ice pellets/snow.
  3. HRRR/RAP show this...but doesn't appear to hinder snowfall accumulations much.
  4. It's not doing so hot so far... The R/S line is steadily working east...located just east of an RFD to RPJ to GBG line. Already into the 12-6AM area.
  5. FYI, none of the GEFS hold on to the lake shadow like the OP does.
  6. They don't have a flow off the lake, they're just slower with CAA. HRRR has NNW winds by 6z.
  7. Seems like widespread agreement on 2-6" tonight/tomorrow across the area. Several models are higher than that, but given their performance last night have to shave some off...though it was a different setup. In this case we'll have the storm deepening, wrapping up and CAA setting in.
  8. Both the GFS and HRRR seem to be on an island regarding this. Everything else has CAA kick in, with a flip to snow this evening or tonight across the area.
  9. 1.2" ORD and 1.4" MDW last night/this morning. As previously mentioned, ORD broke the snowfall record for the date of 0.7" (1923).
  10. That axis of snow last night and this morning from W IL into N IL ended up much more narrow than pretty much any model showed, even the NAM's, which usually do a fairly good job with banding. All guidance did a terrible job on amounts, and even QPF as well. Based on reports, it looks like the main axis was ~15mile wide with 1-3.5", and a DAB surrounding that.
  11. 0.9” ORD so far. Breaks record for the date of 0.7” (1923). .
  12. 18z Euro has an axis of 6-11" tonight across portions of N/C. IL. Then wraps up the system on Thursday, with another more widespread 3-7".
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