Lymington Tides?

RalphyM said:
But this is exactly what happens in Lymington. Here are today's and tomorrow's tide (GMT) with the difference between HW and LW times. These are from the UK Hydrographic Office:

11-May HW 03:35
11-May LW 07:17 03:42
11-May HW 16:05 08:48
11-May LW 19:44 03:39
12-May HW 04:00 08:16
12-May LW 08:11 04:11
12-May HW 16:37 08:26
12-May LW 20:45 04:08

As you can see the ebb is significantly shorter than the flood. This is due to the fact, as has been mentioned above, that there are 2 HW and the tables only show one. HW is unreliable (as all RYA theory teaches :)). LW is what you should be basing your tidal calcs on.

Edit: Looking at the EasyTides predictions a bit more. The interesting thing is that Southampton is defined with 2 HWs in the tables but for some reason they don't do this for Lymington. I can see where the confusion comes from and have no idea why Lymington isn't shown with the same.
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Of course if there is a HW stand, the ebb is shorter than the flood, but the ebb is not as short as 2hr24mins.
An ebb of that period would straighten out the bends in the river with its ferocity.
I am fully aware of the Southampton double high & the need to consider LW times (I held a pilot exemption for the area), but in this case HW & the start of the ebb was critical, since a diver was going down & wanted debris free water, to see. With a 2hr 24 min ebb, it would have been extremely hazardous to put a diver down.
 
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Angele said:
Easytide has only just recently starting doing this for Southampton and Portsmouth and a number of secondary ports in the Solent. Interestingly, the list includes Yarmouth and Hurst, but not Lymington.

See here: http://www.admiralty.co.uk/Admiralty...r stands.pdf

Maybe they will get round to doing it for Lymington in due course.
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Reeds has had LW curves for as long as I can remember for that area, including Lymington.
 
alant said:
Of course if there is a HW stand, the ebb is shorter than the flood, but the ebb is not as short as 2hr24mins.
An ebb of that period would straighten out the bends in the river with its ferocity.
I am fully aware of the Southampton double high & the need to consider LW times (I held a pilot exemption for the area), but in this case HW & the start of the ebb was critical, since a diver was going down & wanted debris free water, to see. With a 2hr 24 min ebb, it would have been extremely hazardous to put a diver down.
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It can be, as pretty much everyone has said. On what evidence are you suggesting it doesn't other than your gut feel?
 
alant said:
Of course if there is a HW stand, the ebb is shorter than the flood, but the ebb is not as short as 2hr24mins.
An ebb of that period would straighten out the bends in the river with its ferocity.
I am fully aware of the Southampton double high & the need to consider LW times (I held a pilot exemption for the area), but in this case HW & the start of the ebb was critical, since a diver was going down & wanted debris free water, to see. With a 2hr 24 min ebb, it would have been extremely hazardous to put a diver down.
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Figures from HM data, seem different to yours

11 May 0141 HW. 0732 LW. 1517 HW. 2046 LW
12 May 0335 HW 0903 LW 1622 HW. 2141 LW
 
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alant said:
Reeds has had LW curves for as long as I can remember for that area, including Lymington.
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Indeed they do. And that is what I said back in post 18.

The text of mine you quoted in post 22 was my comment back to RalphyM that Easytide only recently starting giving the times of both HWs on each tide for many of the harbours in the Solent (but not Lymington).

I'm still curious to know why you are obsessed with the time of HW at Lymington whan everyone is telling you it doesn't have a single time measurable to the minute. :confused:
 
alant said:
Of course if there is a HW stand, the ebb is shorter than the flood, but the ebb is not as short as 2hr24mins.
An ebb of that period would straighten out the bends in the river with its ferocity.
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Well, it hasn't managed to do that to the River Hamble. Admittedly the Hamble near the entrance is much straighter than Lymington at the same point and, nowadays, the banks are pretty much immovable because of development - but it wasn't always that way and yet the 90 degree bend at Swanwick must have existed before the river banks were piled.

Warsash tide times for today:
2nd HW 16:38 GMT
LW 19:52.

As those of us berthed on the Hamble know, not much happens for the 30 mins after the second HW, but then it all goes swoooosh. In about 2hrs 30.
 
Angele said:
Well, it hasn't managed to do that to the River Hamble. Admittedly the Hamble near the entrance is much straighter than Lymington at the same point and, nowadays, the banks are pretty much immovable because of development - but it wasn't always that way and yet the 90 degree bend at Swanwick must have existed before the river banks were piled.

Warsash tide times for today:
2nd HW 16:38 GMT
LW 19:52.

As those of us berthed on the Hamble know, not much happens for the 30 mins after the second HW, but then it all goes swoooosh. In about 2hrs 30.
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That's because its attached directly to Southampton Water, so follows that closely.
Lymington drains into the west solent, so effect not so drastic.

I am curious not obsessed with Lymington HW time, because that particular day, was completely out of sync with the days either side (as well as different to the paper version).
 
I'm getting weirdly distracted by this!

It seems to be that the shortest ebb is approx. 4 days after the new moon. Wonder why that is?
 
RalphyM said:
I'm getting weirdly distracted by this!

It seems to be that the shortest ebb is approx. 4 days after the new moon. Wonder why that is?
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Not you too!!! :eek:

Because that is the point when the higher HW is the second one, and the time from the second HW to LW is, unsurprisingly, shorter than the time from the first HW to LW.
 
No, not at all. I understand why the ebb is short (well it isn't really, it is just a indistinct HW). I think my question was badly phrased :)

I was wondering about the tidal flows that cause the double highs and why they change at particular moon states. It obviously relates to the spring/neap cycle but wondered what exactly happens to cause the double HW and why it varies over the cycle. ie why the first HW is larger in the neap part of the cycle and the second HW larger in the spring (so giving a "shorter ebb").
 
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RalphyM said:
No, not at all. I understand why the ebb is short (well it isn't really, it is just a indistinct HW). I think my question was badly phrased :)

I was wondering about the tidal flows that cause the double highs and why they change at particular moon states. It obviously relates to the spring/neap cycle but wondered what exactly happens to cause the double HW and why it varies over the cycle.
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Ah! Now that is a much harder question to answer. I once read a really good article that someone on here linked to. (Sorry, but I didn't save the link). It was really rather complicated and, although I followed most of it, in the end I concluded it was all too much and I decided to go sailing instead.

Now I just accept it is what it is. :o
 
RalphyM said:
No, not at all. I understand why the ebb is short (well it isn't really, it is just a indistinct HW). I think my question was badly phrased :)

I was wondering about the tidal flows that cause the double highs and why they change at particular moon states. It obviously relates to the spring/neap cycle but wondered what exactly happens to cause the double HW and why it varies over the cycle. ie why the first HW is larger in the neap part of the cycle and the second HW larger in the spring (so giving a "shorter ebb").
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The double HW's, is due to Southampton & associated local ports being at the fulcrum of a long tidal seesaw channel/gutter, known as the English Channel. That's according to Senior Southampton Pilots & nothing to do with the IoW, which is often quoted as the reason.
 
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