Exactly! And was why I questioned that the period isn't matching the 
forecast number of days; e.g., 7 days;
-b'2019-03-22 00:00' -e'2019-03-30 00:00'

[image: 7-day example.PNG]


On Friday, March 22, 2019 at 11:52:44 AM UTC-4, Andrew Milner wrote:
>
> in the command you issued you requested tide information for the 4 weeks 
> from 22 march thru 19 april - so that is why 4 weeks of data was returned.
>
>
>
>
>
> On Friday, 22 March 2019 17:36:09 UTC+2, V. Kelly Bellis wrote:
>>
>> It works and produces 4-weeks worth of tide tables  - why 4 weeks and not 
>> the same number of forecast days?
>>
>> [image: tide output to tty.PNG]
>>
>>
>> On Friday, March 22, 2019 at 11:04:16 AM UTC-4, mwall wrote:
>>>
>>>
>>> and what happens when you execute the command directly?  try it:
>>>
>>> /usr/share/weewx/tide.sh -fc -df'%Y.%m.%d' -tf'%H:%M' -l'Ellsworth' 
>>> -b'2019-03-22 00:00' -e'2019-04-19 00:00'
>>>  
>>>
>>

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