July 2025 General Discussion

[A-L-E-K]

5 minutes ago, mjwise said:

88/80/105 in DeKalb. Full corn transpiration mode activated. Just disgusting.

juiced

[OrdIowPitMsp]

Tropical downpours on and off today. Keeping temps in check, rather be soaked from rain versus sweat. 

[A-L-E-K]

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

doubt these micro spuds impact temps south of the cheddar curtain much

probably shaved a degree or two off today

[Chinook]

high heat index, perhaps the hottest of the year for any area that's 107-109 right now

 

[King James]

Cloud cover and breeze saved the day for sure

[Brian D]

It's looking like 1.5-2" of rain so far today. We'll see how the rest of the day fairs. Solid top 10 wet July for sure with rain totals in that range today. Maybe even top 5 at the end of the month. 

[Chambana]

90/82/111 in the paign. Brutal fellas 

[vortex]

Breeze felt good today. 
 

[cyclone77]

First 80 degree dew of the year in the bag here.

[OrdIowPitMsp]

High of 83 before the rain hit, but we hung in the 70s most of the day.

0.96” at the airport.

[Chicago Storm]

Topped out at 94° at ORD and at MDW today.

...2025 90°+ Day Tally...
19 - ORD
19 - DPA
18 - MDW
18 - ARR
18 - PWK
16 - LOT
15 - RFD
11 - UGN

[Chicago Storm]

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

probably shaved a degree or two off today

na, that had zero impact on the day.

[frostfern]

The current squall line over Northern Lower is more impressive than expected.  The southern outflow boundary might act to really concentrate the steam flowing up from Illinois.  I don’t see those dewpoints mixing out so easily this time.

[sbnwx85]

Decent heavy rain/flood potential starting tomorrow night through Saturday for Northern Illinois and Indiana.

[Chinook]

St. Louis area  (Belleville IL) had 96/79/114.3

[Torchageddon]

While the south sweats, it was nice here with the heat event just starting. It was 30C/86F but my station was higher by a suspicious margin. Lots of clear skies this week, perfect air and breeze for days. Shaping up to be the best wx week of 2025?

[hawkeye_wx]

Got a brief, but pretty heavy, downpour from the bubbly, gusting-out line very early this morning.  I picked up another half inch of rain, so I'm now approaching 7 inches for the month.  July 2024 was also very wet.

[cyclone77]

The Iowa stuff is crapping the bed.  The new stuff should fire off to the east/south later today.  Looking like a skip-over for this area with this one.  

[A-L-E-K]

late fri early sat looks like our best shot at a widespread soak

i want to believe

[Torchageddon]

On 7/17/2025 at 8:57 AM, Torchageddon said:

This is now the 8th overcast/rainy Thurs morning in a row (during the clearest months, during a hot/slightly drier regime). I'd love to know what the statistical odds of this are but my local historical data sucks plus I wouldn't ken how to go bout figuring it. I assumed around 20% of such a morning - when stacked for 7 in a row it was at 0.013%!! Now at 0.0026%...

The impossible happened: on what was suppose to be a mostly clear sunny hot day, I woke up at 7 to see dark overcast!!  For 9th in a row that comes to 0.00052% - this is incomprehensible. Now the caveat is what range in the morning to use as this morning isn't quite so long for darkness. At 815 there were bluer skies coming in a bit to the west but the sun was mostly covered and new clouds generated over me as of 850am. I've used up to this point 6am-10am but the majority of these Thurs mornings have been overcast til noon at least. I could increase my % to 35-40% to reflect less time in the dark but that muddles this.

I checked my own records for mornings even before May 22, which fortuitously I keep track of. May 15th was partly cloudy, but the previous 3 Thur mornings were all dark overcast!! The last clear Thurs morning I had was all the way back on April 17!!! Only 1 out of the last 13 had partly cloudy with sun, WTF!? As you go back into mid-spring the chances of an overcast morning skyrocket but nearly 13 in a row, come on....

[Powerball]

51 minutes ago, Torchageddon said:

The impossible happened: on what was suppose to be a mostly clear sunny hot day, I woke up at 7 to see dark overcast!!  For 9th in a row that comes to 0.00052% - this is incomprehensible. Now the caveat is what range in the morning to use as this morning isn't quite so long for darkness. At 815 there were bluer skies coming in a bit to the west but the sun was mostly covered and new clouds generated over me as of 850am. I've used up to this point 6am-10am but the majority of these Thurs mornings have been overcast til noon at least. I could increase my % to 35-40% to reflect less time in the dark but that muddles this.

I checked my own records for mornings even before May 22, which fortuitously I keep track of. May 15th was partly cloudy, but the previous 3 Thur mornings were all dark overcast!! The last clear Thurs morning I had was all the way back on April 17!!! Only 1 out of the last 13 had partly cloudy with sun, WTF!? As you go back into mid-spring the chances of an overcast morning skyrocket but nearly 13 in a row, come on....

Them are the doldrums of living in the Great Lakes region (specifically downwind).

I feel for you...

[TheClimateChanger]

Among very long POR sites, Cedar Rapids, Iowa reached a daily record high minimum temperature (78F) with Baton Rouge, Louisiana tying its record high minimum (79F). Several other locations were close to records, with Moline, IL; Memphis, TN; and Tupelo, MS each matching their second warmest daily low.

Looking at some observations this morning, Chicago and South Bend would each set new daily record high minimum temperatures if the current lows were to hold through the day. I didn't check anywhere else, but there's probably several more out there. Unfortunately, convection appears likely to spoil some of these low temperatures, especially at Chicago. South Bend might set a record even if there is convection there due to the high dewpoints. The current daily record high minimum there is 74F, whereas the low temperature this morning was 76F.

[Chambana]

87/78/100 at the 10AM obs. Should make a run at a 115 HI today.

[TheNiño]

Slight risk added for Chicago metro today? Didn’t really see that one coming.

[Powerball]

2 hours ago, TheNiño said:

Slight risk added for Chicago metro today? Didn’t really see that one coming.

Got strong surface heating, modest mid-level lapse rates and surface dews in the low/mid 70s. So wet microburst potential is definitely on the higher end today.

[A-L-E-K]

 

[frostfern]

It was pretty impressive for GRR to hit 90 before noon.  Dry soil feedback / dewpoints mixing down to around 70 boosted the heat.  In ideal conditions that would be a setup for upper 90s.  Increasing clouds and strengthening wind off the lake is putting a lid on this afternoon though.

[A-L-E-K]

micro line trying to gather steam, will be a close call on the miss south but should get clipped enough for a soak

[frostfern]

I’m afraid I get the gap again.    What a summer.

[WestMichigan]

Just now, frostfern said:

I’m afraid I get the gap again.    What a summer.

Let's hope not.