Rainfall from Metar not working

Archive Archived Weather Display Usage Questions
1

Hi all,
I have an AAG 1-wire system with no rain bucket and am trying to get the rainfall from the metar at the Toronto Airport CYYZ.
At the moment, I am getting the Barometric Pressure and Humidity from this metar, but the rainfall won’t work. I get the rain icon from the metar, but no reading.
I have read all the associated threads, and checked all the setting, but no luck.
I am sending the info to WDL at this address:

http://gavinf.no-ip.com/~Gavin/WDL/

Any suggestions / solutions would be great.
Thanks,
Gavin

2

Not all METARs contain rainfall info. They should contain rain as a condition, but not the actual amount of rain that’s fallen. If you can give an example of a METAR that you think contains rain amounts, we can try to decipher it and see if the info is really there.

3

Thanks for the prompt reply.
The metar is CYYZ
It’s not raining now, but here is the current reading

METAR CYYZ 302200Z 30019G25KT 15SM BKN032 04/M04 A3000 RMK SC7 SLP165

and here is the link to weather underground

http://www.wunderground.com/Aviation/index.html?query=CYYZ

Weather Underground seems to pick up rainfall from the CYYZ metar

Hope this helps.
Gavin

4

Gavin,

That particular Metar contains no rain specific information.
http://heras-gilsanz.com/manuel/METAR-Decoder.html

I would check it again when you know it is actively raining at your Metar Location and see what that shows.

-Bob

5

Hi Bob,
Thanks for the great METAR decoder link. I looked up CYYZ on weatherunderground and found a metar reading when it was raining.
METAR CYYZ 291100Z 09013G18KT 4SM SHRA FEW016 OVC023 08/05 A2937 RMK SC2SC6 SLP947
The decoder says, Weather: Showers of Rain, so I figure the amounts are not recorded by the metar.
However, the amount is listed for that day at weatherunderground
Precipitation:
Precipitation 0.59 in / 1.5 cm 2.51 in / 63.8 cm - ()
Is there any way I can get WD to see and import the amount without doing it manually? I am tired of seeing no rainfall amounts in WD.
Thanks for all your help.
Gavin

6

I am not aware of a method for WD to grab current rainfall from WU but perhaps someone has written a script for that?

Good luck,
Bob