Chicago Storm

ORD is now 99/79/118. The heat index of 118° ties the highest on record, set on 7/13/1995.

It’s not gonna hold, no chance at this one. .

98/78/116 at ORD currently. .

ORD with a peak of 96° as of noon. With clear skies, thermal ridge overhead, and compressional warming from the incoming front… 100°+ should be bank at this point. .

ORD snuck in a 90 yesterday. For today, it topped out at 98 at ORD, 98 at MDW, and 97 at RFD. ...2023 90°+ Day Tally... 17 - ORD 15 - MDW 11 - DPA 11 - ARR 11 - LOT 10 - RFD 9 - PWK 5 - UGN

Port Washington CMAN site reporting 100. About as close as you're gonna get to an official 100 for you there.

Currently 98/78/116 at ORD. One of the high end combinations on record.

Will end up breaking the record high max and record high min temps today at ORD.

enough already with this nonsense. .

.

80° dew point at ORD currently. Highest and first 80°+ since 1999. .

And the trend since reversed. Tomorrow has the best shot at 100+ we’ve seen in years. .

Wednesday is now looking like it'll likely be the hottest day of this period around here, and the hottest day of the year. Back-door front timing for Thursday has been speeding up on most guidance, otherwise there would have had a higher temperature ceiling for then.

Topped out at 91 at ORD, 91 at MDW, and 91 RFD yesterday. Cooler today in the wake of a back-door front. ...2023 90°+ Day Tally... 15 - ORD 14 - MDW 10 - DPA 10 - ARR 10 - LOT 9 - RFD 8 - PWK 4 - UGN

that’s because the GFS mixes an unrealistic amount. .

LER across portions of SE Wisconsin and NE Illinois tonight. Not a perfect setup by any means, but there's a solid fetch and nice convergence zone just inland. .

that’s the seasonal trend, so lock it in. .

stop wasting time looking at GFS temp plots. .

Usually I'm not big on the long range thoughts as much during the summer, mostly cause I'm out actually enjoying things. However... I did want to mention that it is likely that this active seasonable/trough/NW flow type pattern will stay locked in around the Midwest/Great Lakes for the next week or so. This is partially the product of a generally -NAO/+PNA regime in place on the larger scale. Looks like the next push of hotter temps/higher humidity will be centered around the Aug 19-24th period or so, as the -NAO relaxes and the PNA flips fairly negative.

In terms of this sub-forum, I'd actually be more interested in the severe threat with the MCV across portions of IL/IN on Saturday...more-so that the severe threat with the main storm system on Sunday across the Western portion of the sub-forum. Likely we'll see a solid corridor with flood potential across portions of MO/IL/IN, tonight through Saturday as well.

but it doesn't.

Snuck in a 90 at ORD and MDW today. ...2023 90°+ Day Tally... 14 - ORD 13 - MDW 9 - DPA 9 - ARR 9 - LOT 8 - RFD 8 - PWK 4 - UGN

July 2023 finished as the 7th wettest July on record for Chicago. Top 10 Wettest July's: 1. 11.15" - 2011 2. 9.56" - 1989 3. 8.98" - 1957 4. 8.84" - 2010 5. 8.33" - 1982 6. 7.68" - 2017 7. 7.61" - 2023 8. 7.58" - 1969 9. 7.31" - 1963 10. 7.18" - 1875

July 2023 finished as the 7th wettest July on record for Chicago. Top 10 Wettest July's: 1. 11.15" - 2011 2. 9.56" - 1989 3. 8.98" - 1957 4. 8.84" - 2010 5. 8.33" - 1982 6. 7.68" - 2017 7. 7.61" - 2023 8. 7.58" - 1969 9. 7.31" - 1963 10. 7.18" - 1875

Topped out at 93 at ORD, 93 at MDW, and 92 at RFD today. ...2023 90°+ Day Tally... 13 - ORD 12 - MDW 9 - DPA 9 - ARR 9 - LOT 8 - RFD 8 - PWK 4 - UGN