Forums > Windsurfing   Western Australia

Where is Seabreeze getting its forecasts from??

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Created by Bails > 9 months ago, 20 Jan 2014
Bails
WA, 158 posts
20 Jan 2014 6:52PM
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Fourth day in a row of temps in the high 30s.... fourth day in a row of Seabreeze forecasting pretty green arrows pointing up to 25kn....fourth day in a row of bog-standard 15-20kn winds exactly as predicted by BOM. What's going on Seabreeze? Is your "Perth" report based on Rottnest or something?

Mark _australia
WA, 22581 posts
20 Jan 2014 10:33PM
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From computer models.

Damn you Bill Gates.

slowboat
WA, 556 posts
21 Jan 2014 8:31AM
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from the retailers that sponsor the site

snides8
QLD, 1730 posts
21 Jan 2014 11:41AM
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Nah they get it from an official source
The wa bureau of meterology
This guy is the head forecaster!



werty
WA, 119 posts
21 Jan 2014 10:06AM
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Why do you feel the need to whinge, amazing the people who blame a prediction website, better write a strongly worded letter to Laurie

Bails
WA, 158 posts
21 Jan 2014 11:38AM
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Not whinging, just curiosity, the bureau of meteorology boating forecasts for the last few days have consistently predicted lighter winds than Seabreeze. Although I have just now noticed that the explanatory guide to the graphs states:

"The Middle of the arrow is where you should read the wind speed from the scale at the sides. Picture the arrow as being like a compass needle, where it rotates around a central point of balance."

Well I always thought it was the top. That probably explains a large part of my confusion

P.C_simpson
NSW, 1489 posts
21 Jan 2014 4:36PM
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The Geraldton forecasts have been pretty good for the past few weeks. you should also learn to read the charts to get the full picture..

Haircut
QLD, 6481 posts
22 Jan 2014 1:08AM
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Bails said..
Is your "Perth" report based on Rottnest or something?


not sure about seabreeze, but pretty sure the BOM system works something like this

[img[

Windxtasy
WA, 4014 posts
22 Jan 2014 9:13AM
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"Perth" is a pretty broad heading. If you look at the breakdown into locations ie Ocean Reef, Melville Water, the wind varies a lot between them.
The seabreeze graph usually reflects Rottnest more than others - I guess that is the local waters forecast which affects most water users - boaties and fishermen.
For more accurate forecasts for your specific location check the Mega forecast on Seabreeze (for Melville Water)
I use the green arrows on Seabreeze as a guide to whether it it worth checking the other sites or not.

evets
WA, 685 posts
22 Jan 2014 9:48AM
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Following Windxtasy's ideas the same is true for the forecasts for Albany. It seems that most of the the forecasts may be reasonably accurate for the airport where the weather station is but the harbour can be quite different. The 2 spots are 10 km apart at significantly different elevations and are affected by very different geographical features.
Recently I sailed in an eastely on the harbour, I left the harbour when it was dead calm and at the airport (5 mins drive away) it was about 18kts south westerly. No forecast is going to be able to accurately predict this for both locations.
The closest forecast for the harbour is Willyweather but as always is a prediction of wind which will not always (often?) be right.

hardpole
WA, 579 posts
22 Jan 2014 10:09AM
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The meteye maps from the BOM are interesting

www.bom.gov.au/australia/meteye/

(click on forecasts on the left, unfortunately cant link directly to the region/settings that are relevant )

Once you are seeing forecasts you can see the "areas" that they are actually forecasting for, it shows that sometimes perth coastal waters seems to mean the ocean west of Rottnest. And the wind forecast for Melville waters is actually also what they expect for Scarborough etc...

Interesting "blob" of high wind over just Carnac island on Thursday early in the day. It doesnt automatically pick the relevant time zone so you need to pick AWST to get the correct times.

surfzup
WA, 57 posts
22 Jan 2014 3:58PM
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It can be a bit hit and miss and is only meant as a guide.

curac
WA, 1146 posts
24 Jan 2014 8:52AM
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margs forecast has been way off.
especially the swell, usually it's pretty spot on.

Vince68
WA, 675 posts
24 Jan 2014 9:07PM
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Weatherzone.com.au isn't too bad. not much detail but reasonably accurate 9am 3pm

evets
WA, 685 posts
25 Jan 2014 6:35PM
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Today the Seabreeze forecast for Albany was spot on. Windfinder, wind guru and Willyweather were all way off. Well done seabreeze!
Unfortunately I do not trust the seabreeze forecast and did not sail as I thought the wind would disappear at any minute!



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"Where is Seabreeze getting its forecasts from??" started by Bails