If you want the max wind gust in the previous 15 minutes shouldn't it be 
something like
$span($time_delta=900).windGust.max.formatted
or for the average
$span($time_delta=900).windGust.avg.formatted



On Saturday, 30 September 2017 10:01:50 UTC+3, Nicolas Cazan wrote:

> <realtime><data 
> realtime="rainheuretest">$span($time_delta=900).windGust.formatted<!--dailyRain--></data></realtime>
>
> Sure enough I forgot one. but it still does not work, I have to forget 
> something.
>
> Le samedi 30 septembre 2017 02:35:20 UTC+2, gjr80 a écrit :
>>
>> Hi,
>>
>> If you look carefully at the $span documentation you will see that you 
>> have an error in your syntax. Your post suggests you are using:
>>  
>>
>>> <realtime> <data realtime = "raintimetest"> $span ($time_delta = 900) 
>>> windGust.formatted <! - dailyRain -> </ data>
>>>
>>
>> The correct $span syntax in your case is:
>>
>> $span($time_delta=900).windGust.formatted
>>
>> The spaces are not critical but the periods (.) are.
>>
>> Gary
>>
>
>

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