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A thread for weather extremes that don’t normally get reported

179111213

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  • Registered Users Posts: 1,530 ✭✭✭SeaBreezes




  • Registered Users, Registered Users 2 Posts: 8,219 ✭✭✭Gaoth Laidir




  • Moderators, Science, Health & Environment Moderators Posts: 12,137 Mod ✭✭✭✭Meteorite58


    The real deal. They had some nerve to continue filming, watch all the trees getting knocked over in the beginning.


    https://twitter.com/Brophyst/status/1408149370369982470?s=20


  • Registered Users Posts: 215 ✭✭Liberalbrehon




  • Registered Users, Registered Users 2 Posts: 1,777 ✭✭✭Bsal


    On Monday Canada is expected to come very close to it's all time high temperature of 45c in British Columbia.

    Lytton, BC has tied it's June record today at 43.3c

    https://twitter.com/extremetemps/status/1408945381053014020?s=20

    Update

    https://twitter.com/extremetemps/status/1408959907773272067?s=20


  • Registered Users, Registered Users 2 Posts: 14,626 ✭✭✭✭M.T. Cranium


    Yep now the next target is the all-time record for BC which is 44.4 C set on July 16 and 17, 1941 at Lytton and Lillooet BC (really it was 112 F, the value of 44.4 is the standard conversion of that reading so it might have been 44.2 or 44.6 for all we know). The two locations had a week-long heat wave which is not that unusual in our climate but the temperature values were extreme. Heat waves further east in 1936 and 1937 produced similar readings in SK and MB provinces, several other instances of 112 F and one of 113 F on July 6, 1937 in southern SK, that being the recognized Canadian maximum and we could see that fall in BC today or Monday.

    The 1936 heat wave (112 F south of Winnipeg MB) produced astounding heat in the U.S. plains states, with North Dakota managing a 122 F (50 C) reading. That heat spread to the east coast and most stations that have weather records from 1936 had their hottest temperatures during the spell July 8 to 15. Toronto hit 105 F on three consecutive days (8th-10th) and NYC hit 106 F on July 9th.

    Overnight lows in the 80s F were common in those brutal 1930s heat waves and thousands of people perished from heat prostration in an era that was generally before air conditioning became widespread in homes.

    Where I live is about three hundred miles east of the hot spots mentioned but there are other ones around the province that have a chance to hit similar values, one of which is quite close to my location (Warfield BC) -- it was about 101 F there today (Sat). Osoyoos in the Okanagan and Pemberton further west are other very hot locations.

    In the nearby state of Washington, readings above 110 F are a little more common and began to appear on Saturday but I think for them the worst will come around Monday-Tuesday when the heat dome settles down over top of them (now it's over top of us).


  • Registered Users, Registered Users 2 Posts: 1,777 ✭✭✭Bsal




  • Registered Users Posts: 1,570 ✭✭✭Tyrone212


    Wow remarkable


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  • Registered Users, Registered Users 2 Posts: 22,627 ✭✭✭✭Akrasia


    Bsal wrote: »

    Wow, 46c is a big jump from that Max of 44.6 MT just mentioned, and 3 weeks earlier than the previous record.

    Pretty serious increase!

    I hope this doesn't shift the bell curve for what constitutes 'normal' weather

    Whats the limit for how hot the human body can tolerate again?

    This climate is perfectly normal, even though sustained temperatures above 37c would kill humans without access to air conditioning, that technology that has only existed for about 100 years


  • Registered Users, Registered Users 2 Posts: 1,777 ✭✭✭Bsal




  • Registered Users, Registered Users 2 Posts: 1,777 ✭✭✭Bsal




  • Registered Users, Registered Users 2 Posts: 14,626 ✭✭✭✭M.T. Cranium


    Quite remarkable temperatures for sure, it even reached 42 C here and this is not known as a heat trap. That is a slightly warmer temperature than either Toronto or New York City saw in the famous 1936 heat wave for their top readings of 105 and 106 F. (42 was rounded up from 41.6 so let's say 107 here today or as you call it, yesterday).

    Going out to enjoy the 26C midnight temps now.

    Luckily there is very little humidity with this, I think in the 1936 heat wave they probably had much higher dew points and therefore a humidex like 50 C, we added basically nothing but the sun is scorching.

    This is supposed to go on for about four more days before gradually moderating to more average July temps which around here are 25-28 C.

    These very high readings have been happening every few summers now but this one is a touch above, in most places, although I did notice some similar readings in southeast WA and northeast OR a few years ago, that one was much less intense over BC though.

    I have been in Las Vegas when it was 47 C and the only difference there was that it never cooled down at night, when we went out to our vehicle shortly after sunrise it was 32 C. Here we get a reasonably cool period near dawn which helps to maintain a liveable temperature in non-air-conditioned homes if it's managed well.

    We've been having quite an interesting discussion about why this heat wave popped up (on American Weather Forum) and opinions are all over the place between "must be AGW" to "would have happened anyway" to more subtle intermediate concepts. I don't think we could ever know for sure, a heat wave like this is not an inevitable detail of a 1 to 2 C deg temperature increase but I suppose the chances of it change from like 1 in 500 to 1 in 50 or something like that.


  • Registered Users, Registered Users 2 Posts: 24,024 ✭✭✭✭Kermit.de.frog


    You'll always get extremes anywhere on the globe at any given time at all times of year. Worth noting parts of north America are below or well below average temperature wise for the time of year as with the Arctic region.

    I don't see anything extreme at all broadly. Just a small enough pocket of heat the through the pacific northwest but it will be gradually shifted in the next days to much cooler conditions closer the average for the region but still above by a few degrees for a while.

    gfsnh-15-54.png?0

    Current anomaly

    gfsna-15-6.png?0


  • Registered Users, Registered Users 2 Posts: 8,219 ✭✭✭Gaoth Laidir


    Yes, certainly impressive airmass temperatures in that one region, with 32 °C T850 noted in yesterday Bedford, OR sounding (same latitude as Barcelona), almost as high as some soundings in Saudi Arabia.

    https://meteologix.com/ie/radiosonde-values/canada/temperature-850hpa/20210628-0000z.html


  • Registered Users, Registered Users 2 Posts: 7,227 ✭✭✭pad199207


    Canada sets new national record as temperature reaches 47.5°C (117.5°F) in Lytton, British Columbia


  • Registered Users, Registered Users 2 Posts: 5,954 ✭✭✭Charles Babbage


    I have been in Las Vegas when it was 47 C and the only difference there was that it never cooled down at night, when we went out to our vehicle shortly after sunrise it was 32 C. Here we get a reasonably cool period near dawn which helps to maintain a liveable temperature in non-air-conditioned homes if it's managed well.


    I emailed my cousin who lives in Vancouver Island, where is it hot but perhaps a bit more bearable. She said that the have a heat pump system than can be reversed to provide some cooling and this is the first time in 7 years that they have used it. So good for heat pumps.


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  • Registered Users, Registered Users 2 Posts: 6,339 ✭✭✭highdef


    Looks like we have a 47.8° @ THE DALLES MUNICIPAL AIRPORT, Oregon


  • Registered Users Posts: 1,570 ✭✭✭Tyrone212


    What was the previous record before it was broken yesterday. 44.6c or 45c? The distance by which this record has been broken is crazy.


  • Registered Users, Registered Users 2 Posts: 1,777 ✭✭✭Bsal


    New record for Canada again today, wonder if tomorrow will beat it

    https://twitter.com/NWSEastern/status/1409682508074082306?s=20


  • Registered Users, Registered Users 2 Posts: 1,777 ✭✭✭Bsal




  • Registered Users, Registered Users 2 Posts: 24,024 ✭✭✭✭Kermit.de.frog


    The cold anomaly in large parts of the Arctic.

    Normal (i.e last year)

    ECH0-0.GIF?12

    Now it's sub -8c 850's...quite unusual for the time of year even more so to see sub -10s anywhere at those latitudes, this will be impeding melt at the surface as temperatures at that level remain at or below freezing.

    ECH0-0.GIF?29-12


  • Registered Users Posts: 1,570 ✭✭✭Tyrone212


    Some Canadian meteorologists on twitter saying there's an outside chance of 49c today.


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  • Registered Users, Registered Users 2 Posts: 1,510 ✭✭✭Reckless Abandonment


    M.T is going to be Melt.T.


  • Registered Users, Registered Users 2 Posts: 7,079 ✭✭✭circadian


    M.T is going to be Melt.T.

    Yeah he's in Nelson or thereabouts? It'll get hot in the interior alright but thoughts and prayers for anyone in the Okanagan.


  • Registered Users Posts: 1,570 ✭✭✭Tyrone212


    Environment Canada

    Extreme heat warning for BC. Highs 40 to 48c today.


  • Registered Users, Registered Users 2 Posts: 14,626 ✭✭✭✭M.T. Cranium


    I am indeed melt T. these days, getting used to it, day four of insane heat here, my location is 2 miles west of Warfield which you see on that map hitting 42.5 yesterday, so probably 42.0 here as we're higher up the hill. That location by the way is not as notorious a heat trap as Lytton or Osoyoos which have a friendly rivalry as hottest locations in BC (and now Canada). And it's probably slightly cooler than Trail BC which is a larger town and down in the Columbia valley a few hundred meters lower in elevation. So Trail probably hit 44 C yesterday. There is very little shade around that area, natural semi-arid landscape further modified by decades of smelter activity (nowadays much reduced and cleaned up, but it obliterated the natural tree cover in the valley between the 1920s and 1970s).

    We expect to be in this for another three days as the heat dome slowly deflates and slides off to the east. Here's a view of the 500 mb flow pattern this morning.

    https://weather.gc.ca/data/analysis/sai_100.gif

    My location is about 50 miles west (and 5 miles north) of where the map shows Idaho's narrow panhandle reaching the Canadian border. This is where the heat dome is now centered, yesterday it was right over my location. But being a bit west of it places us where Lytton was yesterday so it's no improvement yet.

    The Dalles is a town in Oregon but their airport is across the Columbia River in WA state so there's a discussion ongoing as to whether their 118 F yesterday should count as WA state new all-time record, however I imagine Pasco (Tri-Cities) will hit 119 or 120 anyway and end that debate.

    These are the hottest temperatures I have experienced at my home location including the decades I lived in Ontario (where 102 F was my home max) but I have seen 117 F in Las Vegas and St George Utah on a road trip in 2011, so that remains my lifetime max anywhere. I guess I could get myself into Death Valley if I wanted to improve on that, but I don't.


  • Registered Users Posts: 105 ✭✭zisdead


    I am indeed melt T. these days, getting used to it, day four of insane heat here, my location is 2 miles west of Warfield which you see on that map hitting 42.5 yesterday, so probably 42.0 here as we're higher up the hill. That location by the way is not as notorious a heat trap as Lytton or Osoyoos which have a friendly rivalry as hottest locations in BC (and now Canada). And it's probably slightly cooler than Trail BC which is a larger town and down in the Columbia valley a few hundred meters lower in elevation. So Trail probably hit 44 C yesterday. There is very little shade around that area, natural semi-arid landscape further modified by decades of smelter activity (nowadays much reduced and cleaned up, but it obliterated the natural tree cover in the valley between the 1920s and 1970s).

    We expect to be in this for another three days as the heat dome slowly deflates and slides off to the east. Here's a view of the 500 mb flow pattern this morning.

    https://weather.gc.ca/data/analysis/sai_100.gif

    My location is about 50 miles west (and 5 miles north) of where the map shows Idaho's narrow panhandle reaching the Canadian border. This is where the heat dome is now centered, yesterday it was right over my location. But being a bit west of it places us where Lytton was yesterday so it's no improvement yet.

    The Dalles is a town in Oregon but their airport is across the Columbia River in WA state so there's a discussion ongoing as to whether their 118 F yesterday should count as WA state new all-time record, however I imagine Pasco (Tri-Cities) will hit 119 or 120 anyway and end that debate.

    These are the hottest temperatures I have experienced at my home location including the decades I lived in Ontario (where 102 F was my home max) but I have seen 117 F in Las Vegas and St George Utah on a road trip in 2011, so that remains my lifetime max anywhere. I guess I could get myself into Death Valley if I wanted to improve on that, but I don't.

    I am pretty sure the 117 in Salem Oregon would be the new OR state record anyway? Quite remarkable as it sits in the Willamette Valley and is not east of the cascades in the Oregon desert region.


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  • Registered Users Posts: 1,570 ✭✭✭Tyrone212


    Aftermath of an intense hailstorm in Eastern France.

    https://mobile.twitter.com/Mediavenir/status/1409862968234459144


  • Registered Users, Registered Users 2 Posts: 7,227 ✭✭✭pad199207


    49.°c (120f) at Lytton BC


  • Registered Users, Registered Users 2 Posts: 1,777 ✭✭✭Bsal


    49.0c has been reached at Lytton, may go a little higher

    https://twitter.com/robsobs/status/1410001361857437701?s=20


  • Registered Users, Registered Users 2 Posts: 22,627 ✭✭✭✭Akrasia


    Bsal wrote: »
    49.0c has been reached at Lytton, may go a little higher

    https://twitter.com/robsobs/status/1410001361857437701?s=20

    Move along folks
    Nothing to see here


  • Registered Users Posts: 1,570 ✭✭✭Tyrone212


    So that's 4C above the old record before this heatwave. Nuts.


  • Registered Users, Registered Users 2 Posts: 7,227 ✭✭✭pad199207


    As mad as it, if it reaches 50°c I’ll be speechless. Climate is seriously in need of a check!


  • Registered Users, Registered Users 2 Posts: 8,913 ✭✭✭Danno


    pad199207 wrote: »
    49.°c (120f) at Lytton BC

    https://www.wunderground.com/dashboard/pws/ILYTTON2

    Nearby AWS isn't far out either for an Easyweather bargain basement unit!:cool:


  • Registered Users, Registered Users 2 Posts: 7,227 ✭✭✭pad199207




  • Registered Users, Registered Users 2 Posts: 8,913 ✭✭✭Danno




  • Registered Users Posts: 1,570 ✭✭✭Tyrone212




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  • Registered Users, Registered Users 2 Posts: 8,913 ✭✭✭Danno


    Tyrone212 wrote: »

    Think some folk are using the PWS on Main Street at the Two River's Inn (the station I linked to earlier) as their source for Twitter tweets.


  • Registered Users Posts: 1,570 ✭✭✭Tyrone212


    Danno wrote: »
    Think some folk are using the PWS on Main Street at the Two River's Inn (the station I linked to earlier) as their source for Twitter tweets.

    https://mobile.twitter.com/ECCCWeatherBC/status/1410017678216024067

    They're confirming 49.5c now. Final figure later.


  • Registered Users Posts: 105 ✭✭zisdead


    That's only 1C off the all time Australian record!!!


  • Registered Users, Registered Users 2 Posts: 1,777 ✭✭✭Bsal




  • Registered Users, Registered Users 2 Posts: 22,627 ✭✭✭✭Akrasia


    Bsal wrote: »

    Completely normal, nothing unusual at all. Oh look there’s an ice age coming according to that inexplicably long running thread….


  • Registered Users, Registered Users 2 Posts: 7,227 ✭✭✭pad199207




  • Registered Users, Registered Users 2 Posts: 8,913 ✭✭✭Danno


    Danno wrote: »
    https://www.wunderground.com/dashboard/pws/ILYTTON2

    Nearby AWS isn't far out either for an Easyweather bargain basement unit!:cool:

    The PWS topped out at 50.4c which was 0.8c above the official reading just south of there.


  • Registered Users, Registered Users 2 Posts: 1,777 ✭✭✭Bsal




  • Registered Users, Registered Users 2 Posts: 1,092 ✭✭✭KAGY


    Danno wrote: »
    https://www.wunderground.com/dashboard/pws/ILYTTON2

    Nearby AWS isn't far out either for an Easyweather bargain basement unit!:cool:

    This is the last image from the Lytton weather station webcam before it went off line around 540 pm local. Last weather report from Lytton was at 541 pm with a temperature of 37C and winds gusting to 67 kmh
    https://pic.twitter.com/imM0VH5aeD
    https://twitter.com/robsobs/status/1410416856603656195


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  • Registered Users, Registered Users 2 Posts: 14,626 ✭✭✭✭M.T. Cranium


    https://weather.gc.ca/data/analysis/sai_100.gif

    Updated 500 mb analysis, the heights are impressive but the thicknesses are to die for.

    This is basically the 1936 heat wave applied to this part of the world. They also had a staggering death toll from heat prostration in large cities and it was probably a bit worse because that was a more humid air mass with overnight lows that stayed near 27 C (we have seen slightly lower minima although it means little because the temperature stays up near 25 C until 0300h then falls off for two hours before the sun starts the cycle over again).

    I heard on the news that "only" 40 per cent of people in BC have air conditioning, which seems quite high to me, I don't think I have ever been in an air conditioned home in BC and that includes a few quite wealthy people (they weren't in at the time, ha ha) ... maybe a few luxury apartment buildings have a/c, ironically most of them are near waterfronts that remain cooler in heat waves. Also I wouldn't be surprised if people in these hot spots have a/c, I have only been through Lytton once and wasn't thinking to look (it wasn't all that hot).

    We had the Spokane TV news on earlier and same story there, heat prostration emergency calls in poorer parts of town. Probably more residents of WA and interior parts of OR have a/c, there are places down there where you would need it to survive every summer not just this one. Of course it's very commonly found across the southern half of the U.S., back in Ontario when I lived there, also not that many people had a/c and there was a need for it several times in the average summer. People just get used to coping with the heat without it, you get onto a schedule of when to open the drapes or blinds, screen windows, and when to close them up. But when there's no relief at night it doesn't work too well (this is why they all have a/c in the southwestern states, the overnight lows are in the range of 29 C to 34 C on a routine basis down there).

    Two similar aspects to 1936 for this heat wave -- (a) it broke existing records for dates by 10-15 F deg and all-time records by 5-10 F deg, and (b) it pushed extreme heat further north than had been seen before.

    I am hoping a third similarity is that it won't happen again for a century. There have been some monster heat waves since 1936, but none of them quite matched it. Oddly this does not show up very well in the NYC temperature records, the only distinction for 1936 is that it set the all-time record of 106 F at NYC, but for a weekly average it barely made the top 50 (it was number one for that in Toronto however). Perhaps a close second would be the 1953 heat wave which lasted about ten days in late August and early September, with very high averages for those prolonged periods. We lived through one in 1988 that came at the same time as 1936 but only within about 8 F deg, it would have broken the pre-1936 records by a slight margin. And there was another attempt in 1995 to recreate the same flow pattern, but that time there was a lot of humidity present and the dew points were the big talking point rather than the air temperatures. For places around Chicago it was probably effectively a worse outcome with humidex values above 50 C from 37 C temps and 29 C dew points.

    Anyway, every singularity is different (that's why they are singularities). This one has overstayed its welcome and as it oozes out into the prairies, I think over the next four or five days it will just slowly transform into a more normal summer heat pattern for the central portion of the continent, get swept away by a short wave and off to the oblivion of all such events, only to be recalled in later years by weather weenies and people with exceptional memories otherwise. It's good for the odd joke, like Bill Gates was fooling around with his weather control machine and everything backfired on him, or bring back air travel, we need more contrails.


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