Sandaysoft

Thanks Steve and Gina for the data.
I've divided the values quoted by 3 to get hourly change rates, which I presume is how it's being sent in realtime.txt, and assume is the same as that showing on the main Cumulus page - tell me if I'm wrong

Then the bit of code I've added to banner.php is looking like this (strings abbreviated for want of room):

// Pressure trend string generation
$barotrend = "steady";
if (ret_value("presstrend") > 0.1 ) {
$barotrend = "slow rise";}
if (ret_value("presstrend") > 0.5 ) {
$barotrend = "rising";}
if (ret_value("presstrend") > 1.2 ) {
$barotrend = "rapid rise";}
if (ret_value("presstrend") > 2 ) {
$barotrend = "v.rapid rise";}

if (ret_value("presstrend") < -.1 ) {
$barotrend = "slow fall";}
if (ret_value("presstrend") < -0.5 ) {
$barotrend = "falling";}
if (ret_value("presstrend") < -1.2 ) {
$barotrend = "rapid fall";}
if (ret_value("presstrend") < -2 ) {
$barotrend = "v.rapid fall";}

($barotrend gets called a bit further down in the code to display)

It's working OK, but I've only experienced 3 different states here so far.
Now wondering if there should be an 'extreme' string for the changes you guys have just experienced, say for 3 or 4mb/hr and over
cheers!

_________________

That's right. Cumulus basically takes the change over the preceding three hours and divides that by 3 to give a 'per hour' figure. In Cumulus I use the original 'three hour' figure to compare against the figures I've quoted. You're just doing it the other way round, with the same result.


Perhaps in places where rapid pressure changes occur more often, e.g. in Tropical Storm and Hurricane areas, they have alternative descriptions with greater scope.

_________________
Steve
Sanday Weather
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Pressure has started to rise after bottoming out at 967.0Hpa. Now heading over to post my new all-time low pressure in this thread.

Looks like my high wind gust record is safer for a little longer.

_________________
Cheers,
Ray, Cheshire.

I'm down to 964.1 and STILL falling!

_________________
Geoff

Pressure is still falling slowly Now at -0.3 hPa/hr
heading over to post my new all time low pressure in this thread.

_________________
Regards
Michael.

CWOP: DW2423
My Weather website http://branksomeweather.co.uk

Looks like a false dawn earlier. Pressure fell to 966.85Hpa at 16:24. Cumulus uses 2 decimal places for pressure but Davis only outputs it to one.

_________________
Cheers,
Ray, Cheshire.

Davis say the station measures pressure (in inHg) to a resolution of 3 decimal places, so I convert that to 2 decimal places for hPa.

_________________
Steve
Sanday Weather
----------------------------------------------------------------------------------------------------------------------------------
Like Cumulus and want to support it? Please donate!

Strange that they only display it on the console to one place then. I suppose resolution is not the same as accuracy so one decimal place in Cumulus would probably suffice but I'm not complaining, only observing.

_________________
Cheers,
Ray, Cheshire.

That's all the console is capable of.

That's good, because I really don't want to go through the argument again (in reverse) that I had when I resisted making this change in the first place. I've already decided that C2 will turn control of the number of decimal places (for all data, for all stations) completely over to the user, so people can do whatever they want, whether it makes sense or not

_________________
Steve
Sanday Weather
----------------------------------------------------------------------------------------------------------------------------------
Like Cumulus and want to support it? Please donate!

It makes sense.

_________________
Cheers,
Ray, Cheshire.

I recorded a record of 961.3 at 4.00pm today, which appears to be pretty much in line with the nearest "proper" weather station at Pembrey Sands. OK, so I only have records for two years, but this beat my previous low by a full 10Mb.

Currently it's 962.1 and rising slowly.

_________________
Capel Dewi (Carmarthen) Weather Station:
http://wow.metoffice.gov.uk/latestobservationservlet?siteID=23385289
https://twitter.com/CapelDewiWeathr

Now that pressure is slowly rising, my low was recorded as 961.6mb at 14:11 today which beat my previous low by more than 14mb.

My total daily rain record was also broken - currently at 21.2mm and still raining lightly outside.

_________________
Steve J
Image Architect
http://www.imagearchitect.co.uk


http://www.imagearchitect.co.uk/weather/index.htm

... and now, if we hadn't had that record breaker the other day THIS low would have broken records too! 973.7 and still falling...

And it's a lot more windy than the other day.

_________________
Steve J
Image Architect
http://www.imagearchitect.co.uk


http://www.imagearchitect.co.uk/weather/index.htm

And my previous lowest would also have been broken. The winds have been something of a disappointment today. Highest gust was 'only' 31mph at 05:54GMT - 11mph below my record. Conditions are worse further north but so far we seem to have got off quite light here.

_________________
Cheers,
Ray, Cheshire.

We've had gusts over 40mph here today and it's forecast to get a lot worse tonight!

_________________
Gina

Sorry, no banner - weather station out of action. Hoping to be up and running with a new home-made one soon.