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Summer 2025 Banter Thread


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On 7/3/2025 at 4:20 PM, michsnowfreak said:

Ive been looking into past heatwaves, primarily 1930s-1950s, and its insane to think how horrible it would be to live through that heat with no AC. The heatwaves were very deadly, and even many hospitals didnt have AC til the late 1940s or 1950s. 

Don't worry. Where we're going, the '30s-'50s dryland heat waves will look like a walk in the park. 2012 was the early warning shot.

(Take the following as an example of *what could happen*):

image.thumb.png.381b0d71f6166e80807ae10ca2f265d2.png

 

 

 

 

 

image.png

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2 hours ago, csnavywx said:

Don't worry. Where we're going, the '30s-'50s dryland heat waves will look like a walk in the park. 2012 was the early warning shot.

(Take the following as an example of *what could happen*):

image.thumb.png.381b0d71f6166e80807ae10ca2f265d2.png

 

 

 

 

 

image.png

Ill believe it when I see it. Ive been hearing this for 2 decades now and still nothing close to rival those 1930s-50s heatwaves in terms of frequency, magnitude, and days in the 90s/100s here. In 2023 Detroit didnt eclipse 90° for the first time since 1915. Every single year in the aforementioned decades there was bad heat, some worse than others. Certainly some was dry, but not all.

But the ENTIRE point of my post was the fact that there was no AC. Ive been researching the daily newspapers and it wasnt just the occasional deadly heatwave. Each summer in those years had deadly heatwaves with the fatalities often listed in the papers. We know how bad tornadoes are for death, but in the pre-AC days the mere summer temperature was the most deadly aspect of the weather.

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2 hours ago, HillsdaleMIWeather said:

We've had not many MCS's making it east at all this summer, wonder if this might be the first summer without being affected by a derecho in years 

The north-to-south temperature gradient has been too baggy.  Southern Canada warm, no big heat south.  Thus no jet dynamics to force convection and keep it going through the night.

We’ve had enough storm damage this year on this side of the state from the March 30 and May 15 events alone.  I’m not begging for a derecho here, but it seems without a better setup it’s hard to get even garden variety rains.

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On 7/6/2025 at 1:05 PM, michsnowfreak said:

Ill believe it when I see it. Ive been hearing this for 2 decades now and still nothing close to rival those 1930s-50s heatwaves in terms of frequency, magnitude, and days in the 90s/100s here. In 2023 Detroit didnt eclipse 90° for the first time since 1915. Every single year in the aforementioned decades there was bad heat, some worse than others. Certainly some was dry, but not all.

But the ENTIRE point of my post was the fact that there was no AC. Ive been researching the daily newspapers and it wasnt just the occasional deadly heatwave. Each summer in those years had deadly heatwaves with the fatalities often listed in the papers. We know how bad tornadoes are for death, but in the pre-AC days the mere summer temperature was the most deadly aspect of the weather.

I think the biggest reason those records are so hard to beat is the increased humidity.  Modern agriculture with irrigation systems and a warmer GOM makes drought-driven heatwaves unlikely.  July 1995 showed you don’t always need low relative humidity to break records, but that was a much shorter event driven by an unusual synoptic pattern that was ultimately transient.  To get long-duration heat waves like the 1930s you need low RH.

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On 7/7/2025 at 2:39 PM, frostfern said:

I think the biggest reason those records are so hard to beat is the increased humidity.  Modern agriculture with irrigation systems and a warmer GOM makes drought-driven heatwaves unlikely.  July 1995 showed you don’t always need low relative humidity to break records, but that was a much shorter event driven by an unusual synoptic pattern that was ultimately transient.  To get long-duration heat waves like the 1930s you need low RH.

I dont disagree. My point was that we aren't seeing those high temps be matched or exceeded anytime soon. 

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On 7/6/2025 at 1:05 PM, michsnowfreak said:

Ill believe it when I see it. Ive been hearing this for 2 decades now and still nothing close to rival those 1930s-50s heatwaves in terms of frequency, magnitude, and days in the 90s/100s here. In 2023 Detroit didnt eclipse 90° for the first time since 1915. Every single year in the aforementioned decades there was bad heat, some worse than others. Certainly some was dry, but not all.

But the ENTIRE point of my post was the fact that there was no AC. Ive been researching the daily newspapers and it wasnt just the occasional deadly heatwave. Each summer in those years had deadly heatwaves with the fatalities often listed in the papers. We know how bad tornadoes are for death, but in the pre-AC days the mere summer temperature was the most deadly aspect of the weather.

I don't know how this myth keeps coming up. Recent summers have been hotter and more humid at Detroit. This is objective data, not opinion. Note data discontinuity in 1959 is responsible for much of the cooling in the 1960s and 1970s. Data for 1934-1958 from City Airport, and from Metropolitan Wayne International Airport since 1959. Data source for all hourly readings is Iowa Environmental Mesonet, and for the mean average temperatures is xMacis.

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Ten least humid summers at Detroit (1934-present)

1936 55.7
1985 56.6
1992 56.7
1965 56.7
1950 57.0
1946 57.1
1934 57.1
1958 57.4
1971 57.6
1964 57.8

 

Ten most humid summers at Detroit (1934-present)

1995 64.4
2010 63.2
2021 63.2
1998 63.0
1949 62.8
2002 62.7
1987 62.6
1973 62.5
1993 62.5
2005 62.5
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Ten coldest summers at Detroit (by average hourly observation) (1934-present)

1992 66.7
1985 68.0
1972 68.0
1964 68.2
1979 68.3
1965 68.3
1982 68.4
1962 68.6
1967 68.8
2004 69.0

 

Ten hottest summers at Detroit (by average hourly temperature) (1934-present)

2012 74.8
2005 74.6
2016 74.6
1955 74.5
1988 74.4
2018 74.3
2010 74.2
1995 74.2
2020 74.1
2011 74.1
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Ten coldest summers at Detroit (by average daily mean temperature) (1934-present)

1992 66.9
1985 67.7
1972 68.1
1982 68.1
1979 68.3
1967 68.9
1958 69.1
2004 69.1
1945 69.2
2009 69.3

 

Ten warmest summers at Detroit (by average daily mean temperature) (1934-present)

2016 74.9
2005 74.8
2012 74.7
1995 74.5
1955 74.4
2010 74.4
2011 74.4
2018 74.4
1988 74.2
2021 74.2
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Ten coldest summers at Detroit (by average hourly real feel) (1934-present)

1992 66.8
1985 68.0
1972 68.4
1965 68.4
1964 68.5
1979 68.6
1982 68.7
1962 68.8
1967 69.0
2009 69.4

 

Ten hottest summers at Detroit (by average hourly real feel) (1934-present)

1995 75.6
2005 75.4
1955 75.3
2012 75.2
2016 75.2
2010 75.0
2018 75.0
1988 75.0
2011 75.0
1949 74.7
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