Chicago Storm

Drought conditions showing up on satellite. 

September 2025 finished tied as the 7th driest September on record for Chicago.

Driest September's
1. 0.01" - 1979
2. 0.26" - 2004
3. 0.31" - 1940
4. 0.32" - 2017
4. 0.32" - 1891
6. 0.46" - 1956
7. 0.49" - 2025
7. 0.49" - 1939
9. 0.74" - 1871
10. 0.77" - 1962

September 2025 finished tied as the 7th driest September on record for Chicago.

Driest September's
1. 0.01" - 1979
2. 0.26" - 2004
3. 0.31" - 1940
4. 0.32" - 2017
4. 0.32" - 1891
6. 0.46" - 1956
7. 0.49" - 2025
7. 0.49" - 1939
9. 0.74" - 1871
10. 0.77" - 1962

Some locations were able to sneak in a rare late September 90°+ day on Monday.

MDW was one of those locations, with a high of 90° on Monday.

I said this a week ago, so we'll see if it sticks this time... We are likely done for the year with 90°+ days, so the below will likely be the final overall tally for the year.

...2025 90°+ Day Tally...
30 - MDW
28 - DPA
28 - PWK
27 - ORD
27 - ARR
22 - LOT
20 - RFD
17 - UGN

Probably the most significant pattern change we've seen in a while is on the horizon...

We're going to replace the constant re-loading +EPO with a re-loading -EPO and -PNA. This will likely will lead to a more active weather pattern than we've seen (That's not hard to do) and more of an up/down temperature regime, with some shots of real fall conditions.

MDW was able to sneak in a high of 90° on Friday.

We are likely done for the year with 90°+ days, so the below will likely be the final overall tally for the year.

...2025 90°+ Day Tally...
29 - MDW
28 - PWK
27 - ORD
27 - DPA
26 - ARR
22 - LOT
20 - RFD
17 - UGN

7 hours ago, A-L-E-K said:

not seeing any end to the mild weather anytime soon

ENS keep a re-loading a +EPO for the rest of the month.

If nothing else were to factor in, that would keep the mild/warm temps in place.

.

Nelson can't be a chill person here if he wanted to rustle frostfern's jimmies.

You are annoying.  Just scroll the fuck past if you don’t want to read asshole.  I don’t read half the shit posted here.  Why don’t you post something?

We added a couple more 90°+ days this past weekend...

It hit 91° at ORD and 92° at MDW on Friday. It topped out at 95° at ORD and 96° at MDW on Saturday.

...2025 90°+ Day Tally...
28 - MDW
28 - PWK
27 - ORD
27 - DPA
26 - ARR
22 - LOT
20 - RFD
17 - UGN

The SPC is too hung up on that struggling MCS across S WI and N IL.

Main focus will be south near remnant outflow, which is partially washing out to the far west in IA. E IA into N IL will be more of the focal point for new development this afternoon.

3 minutes ago, hawkeye_wx said:

Holy cow, what a storm!   This reminds me of the derecho.  It briefly poured half-inch size hail, then 70 mph wind blasted through.  I couldn't even see the houses across the street.  Thankfully, our hail was only half-inch size.  A spotter only a mile away reported ping-pong ball size.

debt repayment has been completed.

final total paid...5 years.

ula vulcan rocket launch was apparently visible overhead for all a short time ago.

Topped out at 95° at ORD and 94° at MDW on Saturday. On Sunday, MDW hit 92° (ORD 89°'d).

...2025 90°+ Day Tally...
26 - MDW
26 - PWK
25 - ORD
25 - DPA
23 - ARR
20 - RFD
20 - LOT
16 - UGN

Peaked at 92° at ORD and 93° at MDW today.

...2025 90°+ Day Tally...
24 - ORD
24 - MDW
24 - DPA
23 - PWK
22 - ARR
19 - RFD
19 - LOT
14 - UGN

22 hours ago, Geoboy645 said:

It always amazes me how much of a difference there is for # of 90s pretty much every year between Chicago and Madison. Madison is only at 8 for 90s so far this year. Obviously the UHI is a major part of that, but still such a stark difference over only ~85 miles in latitude.

UHI isn't as big of a factor as you'd think it is.

For example... RFD has is sitting at 18 days and ARR is sitting at 21 says. 3/4th of RFD is surrounding by open land and corn fields. ARR is in an entirely rural area, fully surrounded by corn fields. MSN is actually situated in a better location for UHI effects that either of them, but, does have the smaller lakes to the SW/S too contend with.

2 hours ago, TheClimateChanger said:

O'Hare tacked on its 24th 90+ day of the season! Projecting forward, the next three days are all forecast to exceed 90F. If that holds true, the count will reach 27 by Sunday. Very respectable tally, exceeded only once since 1988 (in the VERY hot summer of 2012), and tied for 11th overall.

Looking specifically at O'Hare (records since 1959), that would be 5th highest. Definitely some good company in there with 2012, 1988 and 1983.

23 90+ days year to date at ORD, not 24.

Hit 91° at ORD and at MDW today.

...2025 90°+ Day Tally...
23 - ORD
23 - MDW
23 - DPA
22 - PWK
21 - ARR
18 - RFD
18 - LOT
13 - UGN

8 hours ago, HillsdaleMIWeather said:

Two summers of smoke 
I am so ready for winter

smoke has been an every summer occurrence for years now.

1 hour ago, cyclone77 said:

Not sure what's up with DVN reporting sites not showing smoke like the other cwas are.  It's been smoky as hell all day lol.

Neither MLI nor DVN have an observer.

MLI is the only site with augmented OBS, likely conducted by someone in the ATCT (usually ass-y OBS).

Topped out at 93° at ORD and at MDW today.

...2025 90°+ Day Tally...
23 - DPA
22 - ORD
22 - MDW
21 - PWK
21 - ARR
18 - RFD
18 - LOT
13 - UGN

Hit 92° at ORD and 93° at MDW today. It also tagged 90° at MDW yesterday, while ORD missed by a couple of degrees.

...2025 90°+ Day Tally...
22 - DPA
21 - ORD
21 - MDW
20 - PWK
20 - ARR
18 - LOT
17 - RFD
12- UGN

2 hours ago, Spartman said:

Dropped to 78. Heat Advisory not cancelled yet, but now extended through tomorrow. Heat Advisory still in effect today is just too much hype.

they're not going to cancel it and then re-issue it for tomorrow, dingus.

the better question is, why is the criteria so low around there. (the same can be said for other cwa's as well)

52 minutes ago, MidwestChaser said:

This weather pattern is boring.

i'd say it has been pretty active.