Glasgow, Scotland hits 31.9C surpassing 1975 all-time record

Written by on June 29, 2018 in Rest of Europe, United Kingdom & Ireland with 0 Comments

While Scotland has reached the relatively rare 30C mark just twice in the last 10 years and four times since the turn of the millennium, Glasgow has had 30C in it’s sights on several occasions including 2006, 2013, 2014 but has always fallen short. Yesterday changed that.

Image: © SWNS.com

Wednesday’s high climbed to 29.5C, a value the city hasn’t seen in at least 13 years. Then the thermometer climbed even further and set a brand new heat benchmark for Glasgow when the thermometer topped 31.9C.

In July 2014 just as hundreds of thousands were in the city for the Commonwealth Games, a high of 28.6C was recorded. The warmest since 2005.

Credit: PA via Daily Mail

August 4, 1975 was the last day Glasgow enjoyed or endured it’s warmest day in recorded history with a high of 31.2C. According to some sources, composite records go back to 1868.

Why did Glasgow manage to surpass the 1975 record this year?

Then came the heat wave of June 2018. The dry May and June has significantly contributed to this week’s historic heat. Persistent blocking high pressure has redirected weather away from Scotland allowing the ground to dry out.

During the first half of spring a diffluent block helped bring a dry Scotland but wetter France and England.

During the second half of spring into the early summer, an omega blocking pattern developed allowing England and Wales to dry out.

Now that we’re well into the summer, that high pressure and dry ground has been helping build the warmth. As the sun’s strongest rays beamed down, moisture within the ground gets lifted into the atmosphere in the form of water vapour. Part of the sun’s incoming energy is used up by evaporating the water vapour within the atmosphere but dry ground means less moisture release and most of the energy goes straight into warming the air.

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