The Mersey Bore as it reached the Warrington weir on 20th April 2015

This is a video of the Mersey Bore as it reached the Warrington weir.
Sorry that the filming gets a bit shaky at times, but I was in discomfort as I clung to the railings filming.

I had read that the Bore bounces off the Weir. Given that this was a large spring tide I doubt it ever does. There is a lock that used to allow barges to sail past the weir on the other side of the island opposite where I filmed from. The lock doors have gone, and so it also acts as a weir now. Possibly the bore bounces off that, but it will be a small bounce.

I continued filming for a while in the hope that I would get the bounce. What I did see was the bore bounce off the curved river bank below and to the right of where I was filming. This acted as a concave mirror, and resulted in a bulge in front of where I was filming, and when that relaxed it sent a second wave towards the bank, which again bounced off the bank.

There was someone else there trying to film the Bore. He chose a position closer to the Weir, and talking to him afterwards he said that his worst fears were confirmed, he didn't see anything. I suppose the bore looses definition as it approaches the weir because the river gets wider.

I also spoke to a pensioner, and he was saying that the best place to see the Bore was Chester road. He also said that when he was a kid the small building by the weir was maned 24 hours a day, to control the weir (I think this was something to do with the Manchester Ship Canal), and they also had a boat to row over to operate the lock, and let barges through.

The Video starts at 1:09pm BST on 20th April 2015. Liverpool Gladstone Dock high tide was 32.9 feet at 12:52pm BST (according to http://www.wolframalpha.com/)

Note that http://www.ntslf.org/tides/tidepred?p... gives times that differ by a few minutes from those on Woolframalpha. Today it's high tide time is 4 minutes later that Woolfram says.

After the bore arrived the tide came in rapidly, and later the water flowed over the weir in the opposite direction.

Incidentally, this is approximately the point the Romans used to ford the Mersey, although back then the river used to flow through what is now Victoria park (I believe the ford was where the skateboarding park is now).