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Old 13-03-2012, 10:23   #1
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Newfoundland Tides

...Anybody else notice huge Newfoundland tide errors compared to CHS tide books? I particularly checked Argentia and St.John's . I think I have a fix...
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Old 13-03-2012, 14:16   #2
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Re: Newfoundland Tides

I never paid attention, not much tide.

Straits of Belle Isle current (can be pretty quick) is supposedly less from tide than winds, or so they say.

But just the other night I saw some pretty big tides in Labrador (around Cape Chidley) referenced to someplace in Newfoundland, Agentia I think. So the topic is of interest.
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Old 13-03-2012, 18:00   #3
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Re: Newfoundland Tides

Oh, sorry, Hpeer- I was thinking of OpenCPN's tide tool in particular...The tides in O just don't agree with the Tidebooks at all, while many other provinces and States I hope too are useable to give a general idea, though I haven't checked many that aren't locally interesting It just seems a systematic error, in this case. Not a drift of old data.
If I edit Newfoundlands HARMONIC file to -2:30 from -3:30 they work waay better not just today.(and yes, I know to add the hour to CHS tidebooks for DST...)

Code:
March 13,Argentia,Nfld
OPCN2.5 is wrong!   CHS 1hr added     OPCN EDITED
Time    Ht              Time  Ht             Time   Ht
01:46  2.36m          00:29  2.40m       00:16  2.36m  
07:16  0.48m          05:53  0.50m       05:46  0.48m  
14:07  2.10m          12:59  2.10m       12:37  2.10m 
19:22  0:50m          18:08  0.50m       17:52  0.50m
15 minutes is ok with me.I'd bet it isn't consistent as 15 minutes but I don't know that yet...year to year that is.

likewise St. John's and maybe all the Newf entries that are -03:30..Haven't checked em all.
It'd affect some Greenland tides in OPCN and whichever others reference these Nfld Harmonics. I just thought I'd mention it. Maybe nobody in Newfoundland has OpenCPN. Maybe it's a confusion here on the roost.
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Old 13-03-2012, 18:11   #4
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Re: Newfoundland Tides

FWIW Navonics has Argentia 3/13/2012 at
Low 03:45 1.7'
High 10:34 6.8'
Low 15:43 1.6'
High 23:16 7.4'

Don't understand your table.
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Old 13-03-2012, 18:45   #5
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Re: Newfoundland Tides

Interesting, now on reload, your post shows up as a real formatted table, not just text.

Something is hosed somewhere.
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Old 13-03-2012, 20:23   #6
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Re: Newfoundland Tides

OK, I see part of my problem, Fugawi/Navonics was taking the time zone from the computer. If I set my computer clock to Newfoundland time I get.

3/13
Low 5:05 1.7
High 12:04 6.8
Low 17:13 1.6
3/14
High 00:46 7.4
Low 5:51 2.2
High 13:11 6.3
Low 17:59 2.2

That aligns much better.
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Old 13-03-2012, 20:34   #7
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Re: Newfoundland Tides

I used the tool last summer in Newfoundland and it worked fine.
Now looking out the window in Nova Scotia is also fine. The heights of the high and low water are hard to judge, but when OpenCPN 2.5.0 showed high tide, it was really high tide. Nova Scotia seems still OK.

Did it work for you last year?
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Old 14-03-2012, 01:41   #8
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Re: Newfoundland Tides

No,changing my computer time zone doesn't make any difference to the high/low water times OpenCPN shows in the upper right hand corner of the tide curve window. Those should always be the tide's "local" time. If it were not so, my table would look a whole lot worse! because I 'm Z-7 (PDST) inBC...Sorry for the reloading table- that was me editing the post to make it show as a table...

if that's "Nfld time", your Fugawi doesn't look to be all that great either on the 13th, if you don't mind me saying, ...But it makes sense that your plotter wants to set everything to the timezone you set.

... I've only looked at one or two places in Nova Scotia compared to the official tables and then got distracted with Nfld which really stuck out as bad. I just happened to wonder how accurate they are...or at least which ones are. It's a time-consuming way to watch a cold snow shower pass by!
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Old 14-03-2012, 05:35   #9
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Re: Newfoundland Tides

To be clear, it is not Fugawi, that is just the portal.

It would be Navonics that is off, that is the 'intelligence.'
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Old 25-03-2012, 09:56   #10
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Re: Newfoundland Tides

here's some new tides. Washington state, Alaska, and Newfoundland.
with note included.
rename your old ones so if you don't like mine, you can restore.
To quote Shel Busey, "It's just that easy!"

tides_NewfoundlandWashingtonAlaska.zip - 4shared.com - online file sharing and storage - download
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Old 07-04-2012, 11:45   #11
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Re: Newfoundland Tides

..bu##ers. apparently you have to login there now for free files? files also posted here.
FS#753 : NewFoundland Tides awry and Washington, Alaska Tides somewhat restored
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