Flood Alert Info - River Hamble

Area Description

River Hamble from Northbrook to Botley.
This is a Flood Alert Area. For this area the highest level of flood notification that you will receive is a Flood Alert. No Flood Warnings or Severe Flood Warnings are issued for this area.
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There are no Flood Alerts currently in force for this area. See below for historical flood warnings.

Area Covered by this Flood Alert

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Flood Alert History

Number of historic Flood Alerts that have previously been recorded for this area:
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Historical Flood Alert Messages for this Area

  • We have only been collating detailed flood messages since May 2017.
  • Each Flood Alert may have multiple updates. The messages listed below may therefore be greater than the number of alerts detailed in the Flood Alert table above.

Flood Alert issued on 13 Jul 2021 08:39
Hamble
Yesterday, 1.5 times monthly average rainfall was recorded in Bishop’s Waltham. This morning (Tuesday 13/07/21), the water level in the River Hamble remains very high, but it is now falling. The river has lowered by more than a metre overnight, and the current rate of fall is 0.3m per hour. Today, the weather should remain fairly dry, with only the odd light shower forecast. This will not cause an increase in water level. Dry, warm weather is then expected for the next 5 days. Along the length of the River Hamble, significant residual flood impacts to land and some roads will continue over the next 12 hours. The situation will improve hour by hour, but the river is unlikely to return to a more typical level until later on this evening. We will continue to monitor the forecast. If it is safe to do so, flood protection (if installed) could be removed this morning. Please avoid walking or driving through flood water, and, avoid the river banks as water will be deep, fast flowing and much more dangerous than normal. We will remove this Flood Alert by 15:00 on Tuesday 13/07/2021.


Flood Alert issued on 12 Jul 2021 22:09
Hamble
The water level in the River Hamble remains exceptionally high. In the last 24 hours, more than a month’s rain (74mm) has been recorded in Bishops Waltham. A Flood Warning is in force for Waltham Chase, Durley and Botley, where property flood impacts are expected. At Durley, the level started to fall at 20:30. However, in the last hour, a further 10mm of rain has been recorded. This rain will cause an additional increase in river level (perhaps by 0.15m) over the next 1.5 to 2 hours. Rain should clear the area by the early hours of tomorrow morning (01:30 on 13/07/21), but an additional 10mm could fall in that time. The river will remain exceptionally high until at least 01:00. It will finally begin to lower overnight, but it will not return to normal for at least the next 24 hours. We will continue to monitor the forecast, and will ensure the river remains free of any reported blockages. We recommend leaving flood protection in place until Tuesday afternoon. This message will be updated by 11:00 on Tuesday 13/07/2021.


Flood Alert issued on 12 Jul 2021 18:24
Hamble
The water level in the River Hamble is high and rising. In the last 4 hours, 43mm of rain has been recorded in Bishops Waltham. This is a significant amount in a short period of time. In the next 30 minutes, it is possible that Durley School may see flood impacts as the Ford Lake will rise faster than the River Hamble. In order to reduce flood risk, Durley and Botley Mill may wish to consider operating their sluices. To aid sluice operation; high tide at Southampton is at 01:30 and 03:22 (13/07/2021) with a forecast tide level of 1.67 mAOD (4.41 mCD). This is slightly lower than a normal high spring tide. No property flooding is expected in Bishops Waltham. Heavy rain is forecast over the next 6 hours, with a further 25mm of rain possible. Given the forecast rainfall, it is possible that a Flood Warning, for onset of property flooding at Durley and Botley may be issued over the next few hours. We will ensure the river remains free of any reported blockages. We recommend installing flood protection at Durley School. This Flood Alert will be updated by 22:00 on Monday 12/07/2021.


Flood Alert issued on 16 Feb 2020 18:55
Hamble
Water levels in the River Hamble remain high, but are now falling slowly. In the last 24 hours, 34mm of rain has been recorded at Bishops Waltham, which is nearly half a month’s rainfall. We expect there to be significant out of bank flooding affecting land and roads at Frogmill, Durley and Botley. This will continue over the next 12 hours. Tomorrow (Monday 17/02/2020) only very small amounts of rain are forecast. Whilst this may cause a small increase in water level, it is not expected to flood property. We continue to monitor the forecast. If you have installed flood protection, we recommend that this is left in place until tomorrow morning. This Flood Alert will be removed by 12:00 on 17/02/2020.


Flood Alert issued on 16 Feb 2020 07:32
Hamble
Water levels in the River Hamble are high and continue to rise. In the last 18 hours 26mm of rain has been recorded in Bishops Waltham. Given the intensity of rainfall it is possible that Durley School may see flood impacts as Ford Lake rises faster than the River Hamble. Durley and Botley Mill may wish to operate their sluices to help reduce flood risk. The next high tide at Southampton is at 17:02 with a forecast tide level of 1.67 mAOD (4.41mCD). Further heavy rain is forecast with up to 15mm expected over the next 10 hours. Water levels are likely to remain high for the next 5 hours before they begin to fall. Flooding of property at Durley and Botley is not expected. A Flood Warning may be issued over the next few hours for Durley and Botley. No property flooding is expected at Bishops Waltham. We recommend installing flood protection at Durley School. This Flood Alert will be updated at 19:00 on Sunday 16/2/2020 or sooner if we think property flooding will occur.