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The June Thread 2021

LovingGulfLows said:
Portland has a really dry semi-arid desert and tall mountains(which further aids in descending warming air) to the east. It's also in a valley where heat can pool. It's near meteorologically impossible for Atlanta and the rest of the SE to get temperatures that hot.

Fun fact....Minneapolis has recorded a far higher record high temperature(115 degrees) than any southeastern city. Turns out having large bodies of water to your south/southwest and to your east helps moderate massive heatwaves.
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I think Minneapolis all time high was 108 in July 1936.
 
Chazwin said:
Also the end of the LaNina and moving into neutral ENSO will support an active STJ as we move into late summer which would provide more cloud cover and higher dewpoints. I mentioned the other day that while the heat out west should release east at some point, it shouldn’t be nearly as intense and I don’t think we’ll see any long drawn out heat waves in the southeast… perhaps one or two 4-6 day periods with widespread 95-100 temperatures, but even 4-6 might be too long. Other than that, to me it looks like we see temperatures predominantly close to averages.
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Which means hopefully not a 2016/2019 repeat
 
Dewpoint Dan said:
I think Minneapolis all time high was 108 in July 1936.
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Yeah I made a mistake here. You're right. I was looking at the entire state of Minnesota. Still higher than Atlanta's which is crazy, but they don't have any large oceans nearby to moderate their temperatures.

Also, a thermal low near the Oregon coast is pulling low level dry desert air from the Southeast into Portland as well. There's just so many things happening in Portland right now that is causing such extreme temps that just simple isn't possible in the southeast.
 
LovingGulfLows said:
Yeah I made a mistake here. You're right. I was looking at the entire state of Minnesota. Still higher than Atlanta's which is crazy, but they don't have any large oceans nearby to moderate their temperatures.

Also, a thermal low near the Oregon coast is pulling low level dry desert air from the Southeast into Portland as well. There's just so many things happening in Portland right now that is causing such extreme temps that just simple isn't possible in the southeast.
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I just dont understand why there's never been this type of heat in Portland before. The conditions present now have never been present in the last 100+ years? That's hard to believe.
 
Dewpoint Dan said:
I just dont understand why there's never been this type of heat in Portland before. The conditions present now have never been present in the last 100+ years? That's hard to believe.
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That's the problem when you only have about 100 years of data over say the past 10,000 or more when the area has been populated ...

... and look at this ... coming off the desert ... https://earth.nullschool.net/#current/wind/isobaric/500hPa/orthographic=-99.29,49.14,586

Screen Shot 2021-06-27 at 6.14.17 PM.png

Said my piece, broke my vow and see ya ...
 
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1. Portland is now 111 vs 100 at the same time yesterday! They're 3 hotter than yesterday's new alltime high of 108!

2. Pendleton is at 110 (7 hotter than yesterday), but their dewpoint is only 31 giving them 7% RH (desert-like drought) and a HI of only 102! To compare, Ft. Myers is at 93 with the same HI of 102 thanks to a 73 dewpoint.
 
"Hot" off the press from Don Sutherland:

"Lytton, BC: 46.1C/115F. New national record for Canada".
Old Canada record 113 84 years ago. That 115 probably isn't yet to their high of the day, and it may get even hotter Mon and/or Tue there! This is insane! Their old all-time record was 112.
 
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cd2play said:
Which means hopefully not a 2016/2019 repeat
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Well NOAA seems to think that we are going into an extended period of Neutral ENSO at least into next spring. That should produce a fairly seasonable fall for most of the east, although wet at times with the active STJ. The bad thing is that while the hurricane season won’t be as busy as last year, things could ramp substantially late in the summer and could get busy for the Eastern Gulf Coast and up the eastern seaboard.
 
GaWx said:
"Hot" off the press from Don Sutherland:

"Lytton, BC: 46.1C/115F. New national record for Canada".
Old Canada record 113 84 years ago. That 115 probably isn't yet to their high of the day, and it may get even hotter Mon and/or Tue there! This is insane! Their old all-time record was 112.
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120 tomorrow.


Sent from my iPhone using Tapatalk
 
Here's something weird. After all of the 6 stations in Wash/Ore either dropped 1-3 F or were steady the previous hour (4 PM PDT), they all rose 1-2 F this most recent hour (5 PM PDT)! The hottest hourly of the day was reached at both Portland (112) and Yakima (107). Keep in mind that until 2 days ago, Portland's all-time high was 5 cooler (107)!

Edit:

Lytton, BC Data as per Environment Canada: 46.6C/116F! Old all-time Canadian record had been 113F.
 
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Chazwin said:
Michigan would be difficult simply because the effects the cooler water of the Great Lakes have on air temperatures. I do seem to remember Chicago getting near 105 during the 1995 heat wave. The you gotta keep in mind is the temperatures that Portland and Seattle are experiencing have never occurred there since records started.
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There's the lake waters, plus not much downsloping for compressional heating since much of the Midwest is flat.
 
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