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Misc 2020 Banter Thread

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I want to say that reading the political thread today and tonight have been great. I see everyone coming together all agreeing these riots and looting is wrong. I see everyone no matter what beliefs you have that we all want the same thing. Just peace and acceptance of all. Its disheartening to see anger and resentment. Yes it’s sad to see all we have is Biden & Trump. Just maybe a miracle will emerge to bring America together. Thanks to admin for allowing the thread to continue to be open. We are all in this together!??
 
I ran some quick numbers this morning for Atlanta during the month of January. The current monthly averages are 52.3F and 34.3F, and it looks like the new averages will be 53.6F and 35.4F. So increases of slightly over 1 degree per.

Current February averages are 56.6F and 37.7F, and the new averages should be 57.9F and 38.8F. So increases of 1.3 and 1.1F respectively.
 
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I just ran the November numbers for the past 29 years because it looked like it was possible that they were actually falling some, and it was true.

For KATL with one year to go, current averages: 63.6F and 44.5F New average, without this upcoming November: 63.5F (-.1F) and 43.7F (-.8F)
 
J.C. said:
I ran some quick numbers this morning for Atlanta during the month of January. The current monthly averages are 52.3F and 34.3F, and it looks like the new averages will be 53.6F and 35.4F. So increases of slightly over 1 degree per.

Current February averages are 56.6F and 37.7F, and the new averages should be 57.9F and 38.8F. So increases of 1.3 and 1.1F respectively.
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Thanks for this data. I decided to take this further:

I. KATL Going from 1961-1990 to 1991-2020 in the means:
A. KATL lows:
- Dec: rose from 35.0 to 38.3 (+3.3)
- Jan: rose from 31.5 to 35.4 (+3.9)
- Feb: rose from 34.5 to 38.8 (+4.3)
- DJF: rose from 33.7 to 37.5 (+3.8)

B. KATL highs:
- Dec rose from 54.0 to 55.7 (+1.7)
- Jan rose from 50.4 to 53.6 (+3.2)
- Feb rose from 55.1 to 57.9 (+2.8)
- DJF rose from 53.2 to 55.7 (+2.5)

Note that winter lows rose faster than highs did. I attribute this to the increase in the airport warming effect due to weaker radiational cooling as time has gone on.
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II. KAHN (where they don't have the KATL airport warming effect on lows):
A. KAHN lows:
- Dec: rose from 35.0 to 36.4 (+1.4)
- Jan: rose from 31.9 to 33.9 (+2.0)
- Feb: rose from 34.5 to 37.0 (+2.5)
- DJF: rose from 33.8 to 35.8 (+2.0)

Note that winter lows went from 0.1 warmer than KATL for 1961-90 to a whopping 1.7 colder than KATL for 1991-2020, a clear indicator of the KATL warming effect for lows. So, this tells me increased warming effect of KATL for mean winter lows has likely been nearly 2F over last 30 years.

B. KAHN highs:
- Dec rose from 55.0 to 56.3 (+1.3)
- Jan rose from 51.6 to 54.2 (+2.6)
- Feb rose from 56.2 to 58.3 (+2.1)
- DJF rose from 54.3 to 56.3 (+2.0)

- Note that unlike KATL, winter lows rose the same amount as highs. This makes sense since KAHN doesn't have the airport related warming effect on lows.
- Since at KAHN winter lows and high both rose 2.0 F, I am guessing that global warming caused N GA winters to warm ~2 F over the past 30 years.
- Note that KAHN highs remained warmer than KATL highs. That's because the airport effect is minimal for highs and the lower elevation of KAHN (219 feet) vs KATL has always favored warmer highs at KAHN (more downslope). That's even after figuring that highs when there's all day long CAD likely average 1-2 colder at KAHN.
 
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GaWx said:
Thanks for this data. I decided to take this further:

I. KATL Going from 1961-1990 to 1991-2020 in the means:
A. KATL lows:
- Dec: rose from 35.0 to 38.3 (+3.3)
- Jan: rose from 31.5 to 35.4 (+3.9)
- Feb: rose from 34.5 to 38.8 (+4.3)
- DJF: rose from 33.7 to 37.5 (+3.8)

B. KATL highs:
- Dec rose from 54.0 to 55.7 (+1.7)
- Jan rose from 50.4 to 53.6 (+3.2)
- Feb rose from 55.1 to 57.9 (+2.8)
- DJF rose from 53.2 to 55.7 (+2.5)

Note that winter lows rose faster than highs did. I attribute this to the increase in the airport warming effect due to weaker radiational cooling as time has gone on.
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II. KAHN (where they don't have the KATL airport warming effect on lows):
A. KAHN lows:
- Dec: rose from 35.0 to 36.4 (+1.4)
- Jan: rose from 31.9 to 33.9 (+2.0)
- Feb: rose from 34.5 to 37.0 (+2.5)
- DJF: rose from 33.8 to 35.8 (+2.0)

Note that winter lows from 0.1 warmer than KATL for 1961-90 to a whopping 1.7 colder than KATL for 1991-2020, a clear indicator of the KATL warming effect for lows. So, this tells me increased warming effect of KATL for mean winter lows has likely been nearly 2F over last 30 years.

B. KAHN highs:
- Dec rose from 55.0 to 56.3 (+1.3)
- Jan rose from 51.6 to 54.2 (+2.6)
- Feb rose from 56.2 to 58.3 (+2.1)
- DJF rose from 54.3 to 56.3 (+2.0)

- Note that unlike KATL, winter lows rose the same amount as highs. This makes sense since KAHN doesn't have the airport related warming effect on lows.
- Since at KAHN winter lows and high both rose 2.0 F, I am guessing that global warming caused N GA winters to warm ~2 F over the past 30 years.
- Note that KAHN highs remained warmer than KATL highs. That's because the airport effect is minimal for highs and the lower elevation of KAHN (219 feet) vs KATL has always favored warmer highs at KAHN.
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Great work here! I was honestly curious about urban heat island for lows. I ran the numbers for Murphy, NC earlier today for January but didn't post them. The January high increased by .5F and the low by 1F, so its pretty consistent on both sides of the spectrum.

I just did July because I was curious if Atlanta would get its first average high of 90, and it looks like it will happen. Through year 29 this is what we have: High 89.6F (+.5F) and 71.6 (+.3F). These aren't huge increases by any means, but steady as she goes. If Atlanta manages the unthinkable average high of 84F for this July, it would maintain an 89.4 average, not impossible, but not likely.
 
J.C. said:
Great work here! I was honestly curious about urban heat island for lows. I ran the numbers for Murphy, NC earlier today for January but didn't post them. The January high increased by .5F and the low by 1F, so its pretty consistent on both sides of the spectrum.

I just did July because I was curious if Atlanta would get its first average high of 90, and it looks like it will happen. Through year 29 this is what we have: High 89.6F (+.5F) and 71.6 (+.3F). These aren't huge increases by any means, but steady as she goes. If Atlanta manages the unthinkable average high of 84F for this July, it would maintain an 89.4 average, not impossible, but not likely.
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I'm honestly surprised Atlanta's avg temp never gets above 90. I think Dallas has an avg high of like 96 or 97 at its peak, so I wouldn't think Atlanta would be that much lower than Dallas.
 
cd2play said:
I think we all hit 100+ at least once this summer (actual temperature). ?
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Yeah June looks like it's going to be relatively decent but I can't help but think we're going to get bitten in July. In fact, IIRC, that was the pattern in 2016.

Edit: Looks like it did start getting bad in the latter half of June 2016.
 
Dewpoint Dan said:
I'm honestly surprised Atlanta's avg temp never gets above 90. I think Dallas has an avg high of like 96 or 97 at its peak, so I wouldn't think Atlanta would be that much lower than Dallas.
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Combine the fact that Atlanta is higher at 1057' above sea level compared to Dallas's 430' and Atlanta has a higher humidity average during the summer months which also plays a role in temperature modification. Keep in mind that the airport is south of town, if it were north into north Fulton or Cobb counties, the average high would probably be 87F or 88F.
 
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