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Post by Fogg on Jun 14, 2023 13:37:29 GMT 12
Why? Attachments:
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Post by fish on Jun 14, 2023 17:51:15 GMT 12
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Post by Fogg on Jun 14, 2023 18:37:05 GMT 12
Look at the different forecasts.
Same area picked (Auckland).
This was the view I had and my friend had at the same moment checking PW whilst standing next to each other.
Massively different views. His said Fri 5pm might be 30-38kts whilst mine said 18kts.
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Post by fish on Jun 14, 2023 20:29:56 GMT 12
Look at the different forecasts. Same area picked (Auckland). This was the view I had and my friend had at the same moment checking PW whilst standing next to each other. Massively different views. His said Fri 5pm might be 30-38kts whilst mine said 18kts. Ah, right. Several possible things. Auckland is a big area, the exact location can influence forecasts bigly. Like just east of Tiri compared to Army Bay. It would be possible to get 10 knts more just east of Tiri. I can get difference forecasts between Arkles Bay, Manly and Rakino. Each is more exposed / windy depending on a particular direction. The other thing is the forecast resolutions. There is a difference between the 1 km model and the 8km model. While they both give the same 'general' forecast, the 1 km model is far more refined, and for a certain location shows different predictions to the 8km model. This is easiest to see when you look at the wind maps. For the first 24 hrs or so they are at 1 km model resolution, then step out to 8km model. The specific forecast wind can change. There is also the obvious question, like both devices were updated with the most recent forecast. When I first looked, I was wondering if you were asking why such a change for the forecast for Friday from one day to the next. First question I would ask is if both forecasts are for the exact same location? Like same bay, not just same 'Auckland'. |
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Post by fish on Jun 14, 2023 21:00:12 GMT 12
Also, one of the forecasts has the 'gusts' minimised, so you are only seeing one line (average) I think for gusts. Visually that makes the differences look greater. Looking at the forecast average wind speed, I'd say you've both chosen different specific locations, but labelled them both 'Auckland'.
If you look at the wind map, it will show you exactly where your little red dot is for 'Auckland'. Remember that when you set up your locations, you can put little red dots anywhere, and name them anything you want. So if you want, you can have 'Auckland' in Bluff, the BoI, or the Bay of Plenty.
I guess it is like GPS assisted groundings. Just like you need to be aware where you put your waypoint, you need to be aware where you put your little red dot. The name is just a label you've given it.
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Post by Fogg on Jun 16, 2023 13:04:23 GMT 12
Turns out the differences were due to the 2 of us having picked different options for “Auckland”. One was off Tiri and the other Rangi channel. But all we did was pick different options from the PW drop-down menu after searching for “Auck”… I’ve suggested PW tidied up the “Auckland” drop down options and makes it clearer exactly where each option is.  |
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