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Old 27 June 2013, 02:08   #1
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Faulty Tide predictions

Just done a tide check for next two days at Warsash and saw this on line with easy tide- There appears to be a three hours increase in HW for the afternoon the following day. and then a very short HW to LW for Friday.

I guess this should be HW 1600 for Friday Oops good thing I dont rely on them. A second check for Cowes appears to be the correct time. Unusual for Admirality

Thu 27 Jun
HW LW HW LW
02:19 07:58 14:57 20:23
4.6 m 0.7 m 4.6 m 1.0 m

Fri 28 Jun
HW LW HW LW
03:12 08:46 18:00 21:13
4.4 m 0.9 m 4.7 m 1.2 m

Predictions should be read in conjunction with the graph
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Old 27 June 2013, 03:08   #2
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Thanks for the headsup. I use Easytide a lot so it's good to know that it can be "off" sometimes. TBH, I should be more cautious about a lot of "data", over recent years I've seen currency rates misprinted in newspapers, same with share prices and more recently, entire days worth of data being incorrect on wx websites.
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Old 27 June 2013, 03:38   #3
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Ian,

Might it be to do with the shape of the graph and how the software determines where the peak is?

The low water times look evenly spaced.

Looking at the graph for today the morning high has the beginning of the high water stand as the highest peak whereas the afternoon high has the end of the high water stand as the highest peak.

I don't think that the data is wrong, just that for Warsash the high water time is a bit in distinct and the graph is what's important!

Duncan
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