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Unchanged for... How long?

Talk about the weather
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mikechristelow
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Unchanged for... How long?

Post by mikechristelow » Mon 20 Jan 2014 10:02 pm

On the same lines as Ray Proudfoot's "New Record? Post here." here is something slightly different.

This afternoon my outside temperature remained unchanged at 4.1degC from 1622 to 1948hrs. I thought there might be some kind of technical problem as I've never seen temperature stay static for so long, so I checked nearby neighbour stations and they record a similar behaviour although all showed an occasional little variation of .1deg here and there.

So.... if you observe an unusually extended period of an unchanged weather trend (wind, temperature, er... anything else?) why not post it here? :P
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http://www.christelow.co.uk
“It's snowing still," said Eeyore gloomily.
"So it is."
"And freezing."
"Is it?"
"Yes," said Eeyore. "However," he said, brightening up a little, "we haven't had an earthquake lately.”


RayProudfoot
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Re: Unchanged for... How long?

Post by RayProudfoot » Mon 20 Jan 2014 10:17 pm

Mike,

That looks odd. Just 25 miles up the road this was my temperature trend for the last 48 hours. As you can see there was quite a variation here. Are you certain your station was broadcasting in that period?
temp.png
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Cheers,
Ray, Cheshire.

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Tau Bootis
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Re: Unchanged for... How long?

Post by Tau Bootis » Mon 20 Jan 2014 10:26 pm

My temperature was almost flat at 4C at that time!
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RayProudfoot
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Re: Unchanged for... How long?

Post by RayProudfoot » Mon 20 Jan 2014 10:39 pm

Strange goings on in the Potteries! :shock: Must have your own micro climate. ;)
Cheers,
Ray, Cheshire.

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steve
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Re: Unchanged for... How long?

Post by steve » Tue 21 Jan 2014 8:06 am

My current temperature graph shows a typical 24 hours in Sanday; the temperature rarely varies by very much:
temp.png
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Re: Unchanged for... How long?

Post by RayProudfoot » Tue 21 Jan 2014 9:38 am

Hi Steve,

An optimist would observe the night-time temperatures are excellent. A pessimist would complain daytime temps hardly rise.

Wind and cloud cover are great levellers.
Cheers,
Ray, Cheshire.

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Unchanged for... How long?

Post by logjam » Tue 21 Jan 2014 5:53 pm

The temperature, even if it is steady, will normally vary by 0.1 or 0.2 degrees up and down as a matter of course. However I have very occasionally noticed this strange effect where the temperature will stay exactly the same for 10 or 15 minutes or so. It always carries on eventually without any indication that it was a false reading. What I mean is that the value doesn't suddenly jump afterwards. It just varies normally. I have always assumed that the temperature really has not varied during that time, and this is a strange combination of effects.

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hills
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Re: Unchanged for... How long?

Post by hills » Wed 22 Jan 2014 9:25 pm

We've recently had a heatwave of 5 days of around 40 degree maximums that abruptly ended at 18:00 on 17/1/2014, then the temperature dropped by over 20 degrees in just over an hour and remained around that point till nearly midday the following day:

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DaveNZ
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Re: Unchanged for... How long?

Post by DaveNZ » Fri 24 Jan 2014 6:53 am

I had a period of 3 hours on 3 Aug 2010 where the temp and dewpoint stayed constant... it was a very moist day with the lowest humidity 97%.
It is rather unusual to have absolutely no change though.

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mikechristelow
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Re: Unchanged for... How long?

Post by mikechristelow » Sun 26 Jan 2014 9:23 pm

Long spell of very static pressure following a significant rapid fall this morning, only just beginning to climb again this evening :?
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http://www.christelow.co.uk
“It's snowing still," said Eeyore gloomily.
"So it is."
"And freezing."
"Is it?"
"Yes," said Eeyore. "However," he said, brightening up a little, "we haven't had an earthquake lately.”


uncle_bob
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Re: Unchanged for... How long?

Post by uncle_bob » Sun 26 Jan 2014 10:41 pm

I've seen the same problems as the OP occasionally. If the issue is the same, and it looks like it, it's the station playing silly buggars where it just stops sending temp data. Usually a battery pull fixes it.
Interested in building your own Weather Station? Maybe check out the WeatherDuino Pro Project Here
Conder, Canberra Weather
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Re: Unchanged for... How long?

Post by westonweather » Thu 30 Jan 2014 2:08 pm

It's not a sensor fault or battery problem, it happens sometimes when we have calm conditions like now with a steady wind speed from a constant direction.

To prove the sensor is working, check the humidity too, it's from the same sensor. If there is ANY variation when your temperatures were not chaning then the console must have received data from the sensor.
calmtemp.png
calmhumidity.png
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mikechristelow
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Re: Unchanged for... How long?

Post by mikechristelow » Thu 30 Jan 2014 10:22 pm

That's what I thought and had concluded. It looks 'unusual' to see a longish period of no change but it clearly happens because of genuine weather conditions from time to timeand this thread was to see who got the longest instances, wherever they maybe in the world (and not including events caused by duff sensor batteries, obviously :lol: :lol: :lol: )
http://www.christelow.co.uk
“It's snowing still," said Eeyore gloomily.
"So it is."
"And freezing."
"Is it?"
"Yes," said Eeyore. "However," he said, brightening up a little, "we haven't had an earthquake lately.”


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westonweather
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Re: Unchanged for... How long?

Post by westonweather » Fri 31 Jan 2014 8:11 am

I've set the bar at 4 hours then. Just after 6am to just after 10am with no change. (See above).

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jdc
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Re: Unchanged for... How long?

Post by jdc » Mon 10 Feb 2014 7:01 pm

Safe to say the wind has been WSW'ly today.
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