Your Highest Heat Index Temp/Lowest Windchill Temp! (city, Canada, degree)
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^^
Confirms my suspicion. Heat waves that effect most of Europe tend to be the dry variety. Which on the one hand would seldom produce any significant heat indecies, but on the other, drier air masses allows for higher temperatures. This is why when our heat hear originates in the Great Plains or the desert southwest we can hit 100's, but if our heat comes from the Gulf of Mexico and the Deep South, it's usually low 90's but with high heat indecies
^^ Confirms my suspicion. Heat waves that effect most of Europe tend to be the dry variety. Which on the one hand would seldom produce any significant heat indecies, but on the other, drier air masses allows for higher temperatures. This is why when our heat hear originates in the Great Plains or the desert southwest we can hit 100's, but if our heat comes from the Gulf of Mexico and the Deep South, it's usually low 90's but with high heat indecies
OK, it was a dry 15% in London on the 10th August 2003, I was wrong in that sense... That surprises me because the northern parts of England and Scotland had thunderstorms and places like London (though not the south coast) had high cloud in the afternoon, so I would have thought that humidity would be, at minimum, 35% or something...
Also you say that Heatwaves that effect most of Europe tend to be the dry variety. While that maybe correct for the 2003 heatwave, that may not be the same for other heatwaves. Can't be bothered to look now, but has anyone found humidity for other major heatwaves in the UK such as the 2006 heatwave, the 1990 heatwave, 1976 heatwave, and if humidity record go this far - the 1911 heatwave?
All I'm saying is that you can't say heatwaves in Europe are dry just on the accounts of the 2003 one, you need to look at other ones such as the major ones, or also the minor, less remembered heatwaves such as the one we had in July 2013...
OK, it was a dry 15% in London on the 10th August 2003, I was wrong in that sense... That surprises me because the northern parts of England and Scotland had thunderstorms and places like London (though not the south coast) had high cloud in the afternoon, so I would have thought that humidity would be, at minimum, 35% or something...
Also you say that Heatwaves that effect most of Europe tend to be the dry variety. While that maybe correct for the 2003 heatwave, that may not be the same for other heatwaves. Can't be bothered to look now, but has anyone found humidity for other major heatwaves in the UK such as the 2006 heatwave, the 1990 heatwave, 1976 heatwave, and if humidity record go this far - the 1911 heatwave?
All I'm saying is that you can't say heatwaves in Europe are dry just on the accounts of the 2003 one, you need to look at other ones such as the major ones, or also the minor, less remembered heatwaves such as the one we had in July 2013...
Where would the source of the high dew points come from?
Checked July 2006. I looked at the 27th because the air temp reached 30C and you had showers/thunderstorms so maybe there would have been higher dew points on that day, as temps were not high, so from my experience, when temps are near 30C dew points can continue to remain quite elevated.... However, according to wunderground, you had 15C dew point with 40% RH at peak heat hour. No heat index is produced.
I highly doubt I would find any "significant" heat indecies in any of London's (or Northern Europe in general), heat waves. Latitude, and geography isn't conducive to that type of heat. I mean why would it? Even in the Mediterranean, high dew points really only hug the coast lines, and air masses dry out as you move inland.
I don't like humidex either, it seems to be a Canadian thing mostly. It is never used over here, only wind chill is used.
That day last year that hit 34C definitely did not feel dry, though.
Check out the difference. June 30th 2014 at MDW. Red outlined figure on the right is the heat index. Now look at what the humidex calculation is.... Really? Felt like 42C? 6C higher than the heat index?
Check out the difference. June 30th 2014 at MDW. Red outlined figure on the right is the heat index. Now look at what the humidex calculation is.... Really? Felt like 42C? 6C higher than the heat index?
Yeah seems to overdo it way too much. Interesting how places like Winnipeg have record humidex readings in the high 40s, wonder how they get all their humidity, seeing as they are much further away from the gulf coast than we are from the Mediterranean
Yeah seems to overdo it way too much. Interesting how places like Winnipeg have record humidex readings in the high 40s, wonder how they get all their humidity, seeing as they are much further away from the gulf coast than we are from the Mediterranean
The geography is flat here. Air masses can travel easier over flat terrain than say hot air masses that get blocked by mountainous terrain in Europe. Plus the hot air coming from the Mediterranean isn't humid. It's North African desert origin.
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