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Is this a heatburst?

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Nin3DSFan
Posts: 18
Joined: Sat Oct 10, 2015 6:14 pm
Weather Station: Fine Offset
Operating System: Windows 10
Location: Oxted, Surrey

Is this a heatburst?

Post by Nin3DSFan » Sun May 08, 2016 11:43 pm

The temperature, dew point, wind, and humidity readings that my station somehow recorded were (over a 10 minute period):

00:07 = 17.5C, 9.2C, 1.4 mph, 58%
00:08 = 18.0C, 9.1C, 1.7 mph, 56%
00:09 = 18.2C, 9.0C, 2.0 mph, 55%
00:10 = 18.3C, 9.1C, 2.1 mph, 55%
00:11 = 18.3C, 9.1C, 2.1 mph, 55%
00:12 = 18.4C, 9.2C, 2.1 mph, 55%
00:13 = 18.6C, 8.8C, 2.5 mph, 53%
00:14 = 18.7C, 8.7C, 2.6 mph, 52%
00:15 = 18.8C, 8.7C, 2.7 mph, 52%
00:16 = 18.9C, 8.6C, 2.9 mph, 51%
00:17 = 19.1C, 8.4C, 2.8 mph, 50%

freddie
Posts: 311
Joined: Wed Jun 08, 2011 11:19 am
Weather Station: Davis Vantage Pro 2
Operating System: GNU/Linux (Ubuntu 18.04)
Location: Ystrad, Rhondda, Wales
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Re: Is this a heatburst?

Post by freddie » Mon May 09, 2016 10:32 am

Nin3DSFan wrote:The temperature, dew point, wind, and humidity readings that my station somehow recorded were (over a 10 minute period):

00:07 = 17.5C, 9.2C, 1.4 mph, 58%
00:08 = 18.0C, 9.1C, 1.7 mph, 56%
00:09 = 18.2C, 9.0C, 2.0 mph, 55%
00:10 = 18.3C, 9.1C, 2.1 mph, 55%
00:11 = 18.3C, 9.1C, 2.1 mph, 55%
00:12 = 18.4C, 9.2C, 2.1 mph, 55%
00:13 = 18.6C, 8.8C, 2.5 mph, 53%
00:14 = 18.7C, 8.7C, 2.6 mph, 52%
00:15 = 18.8C, 8.7C, 2.7 mph, 52%
00:16 = 18.9C, 8.6C, 2.9 mph, 51%
00:17 = 19.1C, 8.4C, 2.8 mph, 50%
I saw similar last night but just before midnight. It is just a small rise in the wind speed leading to an increase in mixing of the air near the ground, which leads to warm air just above the surface being mixed downwards and causing a small temperature rise. It is quite common on nights with light (but not calm) winds.
Freddie
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jimkorman
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Joined: Wed Aug 02, 2017 9:54 pm
Weather Station: Davis Vantage Pro
Operating System: Windows 8
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Re: Is this a heatburst?

Post by jimkorman » Wed Aug 02, 2017 10:06 pm

A heat burst normally looks more like these data - From central Nebraska, USA (June 11, 2013)

Note the over 20F temperature rise - as well as the drastic decrease in humidity.
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Jim Korman

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