This category contains flood alert information, in particular the water levels in the Tilshead Borehole. Graphs will be published weekly from 1st December through until the end of March.

Tilshead Borehole Levels: 18th January 2019

After 20 days without rain and with no rain at all this year, we finally got a wetting on Wednesday 16th.  With only 2mm falling in the 24 hour period, it hardly counts as a deluge.  Nevertheless, the water levels in the Tilshead borehole continued to rise at a slowly diminishing rate.  This really brings home what a wet December we had.

Water levels are now 5-6 metres below the 6 year average and 15 metres below the last flood year.

More rain, sleet and maybe even a little wet snow is predicted for overnight, tonight.  Tomorrow we may have some showery rain and possibly some localised thunder.  Sunday will be drier, with showery rain returning on Monday and Tuesday.  As we move into February, the wet, cold weather will continue with some sleet and maybe some significant falls of snow, even on Salisbury Plain.  Might be the time to check out your sledges!

Tilshead Borehole Levels: 11th January 2019

Well, well!  Here we are nearly 2 weeks into the New Year and not a drop of rain since late in December.  You might be forgiven for expecting borehole water levels to have fallen, but that is not the case.  The borehole water level has risen continuously since early December, though the rate of increase is tailing off.  The more observant of you may have noticed that the water level in the River Till has fallen a smidgin over this same period.


We are expecting some light rain over night tonight, a bright Sunday and maybe a little more rain on Tuesday.  In the longer term, we should expect the arrival of some colder weather towards the end of the month into February.  February is also likely to bring more precipitation of all kinds.

Tilshead Borehole Levels: 4th January 2019

The first post of the New Year and water levels continue to rise in the borehole, despite the almost complete lack of rain over the last week.  It just goes to show how saturated the ground was after the 6-year record December rainfall.


As you can see, the level is now almost 2 metres below the 6-year average for the 4th January and some 11 metres below that seen on the 4th January 2014 during our last flood year. Rain and other precipitation over the next few weeks could make a considerable difference to the levels and the current rate of change.

We are not expecting any large amounts of rain in the near future; maybe sone drizzle late tomorrow and some light rain on Monday evening. We aren’t really going to see any heavy rain until later in the month and there is still the prospect of some very cold weather with the possibility of snow!

Tilshead Borehole Levels: 28 December 2018

A very interesting week indeed.  The rain at the weekend left run-off puddles in the river bed down-stream of the Church Street bridge, but with no puddles visible upstream of this bridge.  The rain didn’t amount to a great deal, only 11.4mm over the whole week, but that was enough to have a big effect.  On Christmas Eve, water levels in the Tilshead borehole passed the 80 metre mark and springs began to break upstream of the Church Street bridge, so that by mid-morning we had water flowing through the village.

As you can see from the graph above, the rate of rise has increased, but is some way below the average rate of rise and overall level.  It seems unlikely that we are going to have a January flood, but we are still early into Winter and a lot can happen between now and Spring.

As for the weather, well, over the next few days we might see some drizzle and patchy light rain into the New Year; but not a deluge.  Otherwise it’s going to be on the mild side for the time of year.   Looking further forward, the temperature may fall a bit in January, but we can still look forward to some warm interludes.  There is also a chance of some wet and windy weather from mid-month onwards.

A Happy, Peaceful, Prosperous and Flood-Free New Year to you all.

Tilshead Borehole Levels: 21st December 2018

It’s been a very wet week and that has meant that there has been an awful lot of surface water around.  If you have been into Salisbury along the Netherhampton road you will have seen that the water meadows are starting to flood.  In the village, there are large run-off pools downstream of the Church Street bridge and water is flowing slowly under the footbridge at Dryden Street*.  It won’t come as a surprise then to learn that this winter has already proved to be the equal first wettest December in the last six years.  In fact, because of rain in the early hours of this morning, which isn’t recorded until midnight tonight, I can already say that this will be the wettest December in the last six years – and we still have 10 days of the month to go.

December Rainfall  mm
2013-2014 6
2014-2015 44
2015-2016 11
2016-2017 8
2017-2018 95
2018-2019 95

With the ground as saturated as it is, it should come as no surprise that the borehole water levels have risen steadily over the last week and are now within a gnat’s whisker of the six-year average. Even without more rain, I would expect the levels to continue to rise steadily as the groundwater soaks in.

The next 7 days will give us a much clearer idea of whether the water levels are following the usual profile for “average” or “flood” years or whether they might level out a bit to be closer to the green line representing a late Spring.  Christmas week seems to be critical for our winterbourne and I sometimes wonder if the village shouldn’t have have been renamed Winterbourne Christmas.

We are expecting more heavy rain this evening and overnight and patchy rain from then until Christmas Day; at least it will be mild.  However, the rest of December is likely to continue to be damp and this will extend into early January.   But, and it’s a huge but, events in the upper atmosphere show an increasing likelyhood of sudden stratospheric warming. What this means is that the weather could get very cold, very quickly, from the start of the New Year onwards, with precipitation falling as snow onto saturated ground.