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General Weather/Earth Sciences Topics => Weather Conditions Discussion => Topic started by: RoryG on February 23, 2022, 12:04:52 PM

Title: Brief Temperature Drop This Morning
Post by: RoryG on February 23, 2022, 12:04:52 PM
We're experiencing a spell of cold and very windy weather just now, up here in Shetland. My Davis Vantage Pro2 Plus recorded a temperature drop of 4C (6C to 2C) then recovered within the hour back to 5C. This coincided with a rise in pressure from 992.6hPa to 993.6hPa then back down to 992.2hPa as the temperature rose. I looked at a few local stations on WU which showed the same event, and our flux tower out on the hills went from 4.6C to 1.2C to 3.1C in the same period.

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Any ideas what would cause an event such as this? Possibly a frontal system, however the rapid recovery of the temperature within the hour is very specific.

Cheers,

Rory
Title: Re: Brief Temperature Drop This Morning
Post by: ocala on February 23, 2022, 06:12:15 PM
Without knowing anything about the topography of the area or anything in general it's hard to say. But that's what's cool about having a station. You can see anomalies like that in weather graphs.
Title: Re: Brief Temperature Drop This Morning
Post by: RoryG on February 23, 2022, 06:23:11 PM
Yes, its great playing with the data, my old weather station only uploaded to WU so I had to pull the data from there. The anomaly has been solved by adding the rain plot, there was very heavy rain at the same time:

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We have a similar event going on just now!
Title: Re: Brief Temperature Drop This Morning
Post by: ocala on February 23, 2022, 06:45:56 PM
On cold nights here with a dead calm wind you can see a rise in temperature when the wind picks up. Then when the wind dies down again the temperature will begin to fall again. Only a Weather geek could enjoy something like that. :-)
Title: Re: Brief Temperature Drop This Morning
Post by: CW2274 on February 23, 2022, 06:54:54 PM
On cold nights here with a dead calm wind you can see a rise in temperature when the wind picks up. Then when the wind dies down again the temperature will begin to fall again.Only a Weather geek could enjoy something like that. :-)
[tup] Very common occurrence here.