Topic: Brief Temperature Drop This Morning

[RoryG]

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 4ºC (6ºC to 2ºC) then recovered within the hour back to 5ºC. 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 4.6ºC to 1.2ºC to 3.1ºC 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

[ocala]

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.

[RoryG]

Yes, it’s 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!

[ocala]

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.

[CW2274]

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.

Very common occurrence here.