My barometric pressure readings go through a cycle every day that I am pretty sure is not really happening. Every day just before 0600 the barometric pressure reading starts rising sharply and goes up 12-15 mb in an hour. Then it spends the next 23 hours gradually going down until it shoots up again the next day.
The pressure readings at nearby NWS stations and personal weather stations do have a diurnal cycle, but it's not the same. They have more of a sine wave looking pattern with a gradual high around late morning and a gradual low in late afternoon.
Has anybody else seen this or have a theory why it would be happening? I'm not sure if it's happening in the software or in my weather station.
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Latest Cumulus MX V3 release 3.28.6 (build 3283) - 21 March 2024
Cumulus MX V4 beta test release 4.0.0 (build 4019) - 03 April 2024
Legacy Cumulus 1 release 1.9.4 (build 1099) - 28 November 2014
(a patch is available for 1.9.4 build 1099 that extends the date range of drop-down menus to 2030)
Download the Software (Cumulus MX / Cumulus 1 and other related items) from the Wiki
Barometric pressure jumps every day at 6 a.m.
- steve
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Re: Barometric pressure jumps every day at 6 a.m.
A number of cases have been reported on this forum of the Fine Offset pressure tracking the inside temperature; your issue sounds similar.
Steve
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- Weather Station: Ambient Weather WS-2080
- Operating System: Windows XP SP2
Re: Barometric pressure jumps every day at 6 a.m.
Just for grins I moved the base unit a little farther away from the window and put a shoebox over it to try to shield it from any environmental factors. We'll see tomorrow morning if it makes any difference.
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Re: Barometric pressure jumps every day at 6 a.m.
Did it?wmayfield wrote:We'll see tomorrow morning if it makes any difference.
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Re: Barometric pressure jumps every day at 6 a.m.
During a period of little actual change in pressure, I've caught my WH3081 (rebadged as "PanTech") showing the temperature dependence of its pressure sensor with inside temperature. It goes through this cycle every day as the reverse cycle air conditioner kicks in and stops for a short time as its outside unit temporarily freezes up.
It looks like there's a close to +0.36 hPa/°C pressure reading variation. I expect that Steve has very little available time, but it would be great if he could add the option of a -0.36 hPa/°C compensation option for FO weather stations to the calibration page which would mostly null out this annoying error.You do not have the required permissions to view the files attached to this post.