# Regarding auto-ranging for atmospheric pressure

**URL:** <https://forum.flowx.io/t/regarding-auto-ranging-for-atmospheric-pressure/617>\
**Category:** General\
**Created:** [May 3, 2020, 6:05pm UTC](https://forum.flowx.io/t/regarding-auto-ranging-for-atmospheric-pressure/617 "2020-05-03T18:05:18Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Ohan](https://forum.flowx.io/user_avatar/forum.flowx.io/ohan/32/249_2.png) [@Ohan](https://forum.flowx.io/u/Ohan)\
**Post date:** [May 3, 2020, 6:05pm UTC](https://forum.flowx.io/t/regarding-auto-ranging-for-atmospheric-pressure/617/1 "2020-05-03T18:05:18Z")

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> [@Temp labels: could you avoid 12.5-degree bands?](https://forum.flowx.io/t/temp-labels-could-you-avoid-12-5-degree-bands/603/4):
>
> improve auto-ranging many times - it’s not easy. This auto-ranging is an algorithm suggested by a user.

> [@Temp labels: could you avoid 12.5-degree bands?](https://forum.flowx.io/t/temp-labels-could-you-avoid-12-5-degree-bands/603/5):
>
> It’s always an aesthetic choice; there’s no one right answer. Personally I prefer leaving a bit of a gap if it gives more easily readable ticks - I’m a [Tufte](https://www.amazon.com/Visual-Display-Quantitative-Information/dp/1930824130) guy.

@garyo I like your thinking!

Redarding auto-ranging for atmospheric pressure, I think that normal pressure should be Centre screen, and then idealy the scale adjusted according to the common variations in the area.

For interesting reading:

> [@https://www.thoughtco.com/how-to-read-a-barometer-3444043](#):
>
> ## Predicting the Weather With the Barometer
> 
> Reading [a barometer](https://www.thoughtco.com/make-a-simple-weather-barometer-3975918) is simple if you know what different atmospheric pressure values indicate. To understand your barometer and how atmospheric pressure is changing, interpret readings as follows (pay attention to units).
> 
> ### High Pressure
> 
> A barometric reading over 30.20 inHg is generally considered high, and high pressure is associated with clear skies and calm weather.
> 
> **If the reading is over 30.20 inHg (102268.9 Pa or 1022.689 mb):**
> 
> - Rising or steady pressure means continued fair weather.
> - Slowly falling pressure means fair weather.
> - Rapidly falling pressure means cloudy and warmer conditions.
> 
> ### Normal Pressure
> 
> A barometric reading in the range of 29.80 and 30.20 inHg can be considered normal, and normal pressure is associated with steady weather.
> 
> **If the reading falls between 29.80 and 30.20 inHg (100914.4** – **102268.9 Pa or 1022.689** – **1009.144 mb):**
> 
> - Rising or steady pressure means present conditions will continue.
> - Slowly falling pressure means little change in the weather.
> - Rapidly falling pressure means that rain is likely, or snow if it is cold enough.
> 
> ### Low Pressure
> 
> A barometric reading below 29.80 inHg is generally considered low, and low pressure is associated with warm air and rainstorms.
> 
> **If the reading is under 29.80 inHg (100914.4 Pa or 1009.144 mb):**
> 
> - Rising or steady pressure indicates clearing and cooler weather.
> - Slowly falling pressure indicates rain.
> - Rapidly falling pressure indicates a storm is coming.