Welcome to the Cumulus Support forum.

Latest Cumulus MX V3 release 3.28.6 (build 3283) - 21 March 2024

Cumulus MX V4 beta test release 4.0.0 (build 4018) - 28 March 2024

Legacy Cumulus 1 release v1.9.4 (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

Weather forecast

Discussion specific to Fine Offset and similar rebadged weather stations
Post Reply
garybuska
Posts: 43
Joined: Mon 02 Dec 2013 4:34 pm
Weather Station: WS2090
Operating System: Windows 8 64 bit
Location: Jacksonville, Fla

Weather forecast

Post by garybuska »

I am curios as to how far into the future does cumulus predict the weather.
I have noticed that my console will show cloudy skies but no rain and cumulus will show stormy , much precipitation.
It does not appear that they agree with each other.
Mind you I know that this is calculated and the two are more than likely doing it differently.
Just curios that's all 8-)
User avatar
steve
Cumulus Author
Posts: 26702
Joined: Mon 02 Jun 2008 6:49 pm
Weather Station: None
Operating System: None
Location: Vienne, France
Contact:

Re: Weather forecast

Post by steve »

garybuska wrote:stormy , much precipitation.
Does it also say "Exceptional weather"? - http://wiki.sandaysoft.com/a/FAQ#My_for ... itation.22

The forecast (when working correctly) is for the next 12 hours - http://wiki.sandaysoft.com/a/FAQ#Cumulu ... t_wrong.21
Steve
garybuska
Posts: 43
Joined: Mon 02 Dec 2013 4:34 pm
Weather Station: WS2090
Operating System: Windows 8 64 bit
Location: Jacksonville, Fla

Re: Weather forecast

Post by garybuska »

Thanks Sandy
I found the link you sent me after I had posted this. It was doing that but I made sure that my settings for pressure were correct.It changes now but it very rarely agrees with what my console says. In case you are not familiar with my Station
It predicts weather trends that are 24 to 48 hours out which would explain why they disagree.
Is there a way to make cumulus predict 24 to 48 hours out?
If not it is no big deal as I know that this is a educated guess anyway no promise that the weather predicted is what is really going to happen.
User avatar
beteljuice
Posts: 3292
Joined: Tue 09 Dec 2008 1:37 pm
Weather Station: None !
Operating System: W10 - Threadripper 16core, etc
Location: Dudley, West Midlands, UK

Re: Weather forecast

Post by beteljuice »

If you have been modifying the forecast pressures see https://cumulus.hosiene.co.uk/viewtopic.p ... 93&#p78293

Are you sure your STATION is reporting the correct adjusted Sea Level Pressure (Relative) ?

The Zambretti based code used (and most others) will not be able to make a forecast of 24hrs plus beacause for that you need data from beyond your weather 'horizon'.

You don't say if both forecasts are correct (Cumulus short, station long), or one but not the other or ........
Image
......................Imagine, what you will KNOW tomorrow !
garybuska
Posts: 43
Joined: Mon 02 Dec 2013 4:34 pm
Weather Station: WS2090
Operating System: Windows 8 64 bit
Location: Jacksonville, Fla

Re: Weather forecast

Post by garybuska »

All I can tell you is that I have not made any changes to the pressure settings. All I have done was to make sure that cumulus and my station were using the same setting. And how would I know if my station is reporting the correct sea level pressure.
I am within 15 miles of Craig Field KCRG but I have never checked to see what they report as sea level pressure
As I stated I have not changed any thing in Cumulus or in my station every thing is pretty much set at the default.
except for some minor fine tuning which would not effect sea level pressure
Post Reply