Severn bore report revisited March 2009 Horseshoe Region
Wednesday, Apr 1st
Pressure varied between 1002 and 1016 millibars between Friday 27th and Monday 30th March with winds veering from westerly to north westerly on Friday and Saturday, dying away on Sunday. Tides peaked at 9.2 metres on Saturday and Sunday. In the horseshoe bend of the river Severn, Friday's bore at "subs" and "boats" was poor with only a short rideable wave at boats spoilt with the westerly wind. Saturday had enough north to give a cross offshore to the Collow sand point wave, which although it held the face up the wave was'nt of sufficient size to ride. Only two surfers were out. A short ride on a small cleanish wave below boats to the Collow pool was enjoyed by Donny and Bendy had a short white water ride above boats. On Sunday Donny Wright was out at the Newnham channel to catch a 250 yard ride from the fish hut to the sluice, where the bore died in common with all the tides since mid February. There was a good ride to be had on B4s bank alongside the road, but nothing like of old
Matt, Tom and Guts, Surfers Path 1999.
Donny trimming small bore Newnham channel Sunday March 29th.
B4s wave Newnham bank, Severn bore Sunday March 29th.
Most notable was the dramatic drop in water levels which on Sunday was such that the cattle ford was showing. The forecast for the next two weeks is looking pretty dry which means that the April main tides could see the river at lowest levels since the droughts of the 70s and 80s. The low levels provided a dramatic example of fluvial movement in the Severn estuary as the scouring effect of the bore was dramatic. So much so that the Newnham channel was effectively just moving mud and sand after the bore had gone through. This was a prime example of
the sediment cloud as well as suspended turbidity currents as the tidal bore passes by which Professor Chanson of Queensland University and his team is researching in tidal bores.
Visiting Surfers in April coming to the Horseshoe Region at Newnham, particularly inexperienced ones, should be prepared for dangerously shallow conditions, with rock and stone in advance of the bore wave.