beta This is a new service – your feedback will help us to improve it.

Coronavirus (COVID-19): how we're protecting our flood warning service

River level River Colne at London Colney

Latest recorded level 1.09m at 5:30am Thursday 1 October 2020.

Levels: last 5 days and next 36 hours

You're missing out. A graph should be visible here.
Upgrade your browser to see and use all the features of this service.


You're missing out. A graph should be visible here.

Javascript must be enabled.

Observed data

DateTime Value Error
1.086 false
1.086 false
1.085 false
1.087 false
1.086 false
1.087 false
1.087 false
1.087 false
1.088 false
1.087 false
1.089 false
1.089 false
1.089 false
1.089 false
1.089 false
1.089 false
1.09 false
1.09 false
1.09 false
1.091 false
1.091 false
1.09 false
1.09 false
1.091 false
1.09 false
1.09 false
1.09 false
1.09 false
1.089 false
1.088 false
1.088 false
1.088 false
1.087 false
1.087 false
1.087 false
1.086 false
1.085 false
1.086 false
1.086 false
1.085 false
1.085 false
1.085 false
1.084 false
1.085 false
1.085 false
1.085 false
1.085 false
1.084 false
1.084 false
1.084 false
1.084 false
1.086 false
1.085 false
1.085 false
1.084 false
1.085 false
1.085 false
1.085 false
1.085 false
1.085 false
1.085 false
1.086 false
1.086 false
1.085 false
1.086 false
1.085 false
1.084 false
1.085 false
1.085 false
1.085 false
1.084 false
1.085 false
1.085 false
1.085 false
1.085 false
1.085 false
1.085 false
1.085 false
1.085 false
1.086 false
1.086 false
1.085 false
1.086 false
1.086 false
1.087 false
1.087 false
1.087 false
1.087 false
1.087 false
1.087 false
1.087 false
1.087 false
1.087 false
1.086 false
1.087 false
1.087 false
1.087 false
1.086 false
1.086 false
1.087 false
1.086 false
1.086 false
1.086 false
1.086 false
1.086 false
1.087 false
1.086 false
1.086 false
1.086 false
1.086 false
1.086 false
1.086 false
1.086 false
1.087 false
1.086 false
1.087 false
1.086 false
1.086 false
1.086 false
1.086 false
1.086 false
1.086 false
1.086 false
1.085 false
1.086 false
1.086 false
1.086 false
1.086 false
1.086 false
1.086 false
1.085 false
1.085 false
1.086 false
1.086 false
1.086 false
1.087 false
1.086 false
1.086 false
1.086 false
1.087 false
1.087 false
1.087 false
1.087 false
1.088 false
1.087 false
1.088 false
1.088 false
1.088 false
1.088 false
1.088 false
1.088 false
1.088 false
1.088 false
1.089 false
1.088 false
1.089 false
1.089 false
1.09 false
1.089 false
1.089 false
1.089 false
1.09 false
1.09 false
1.09 false
1.09 false
1.092 false
1.092 false
1.091 false
1.091 false
1.091 false
1.092 false
1.093 false
1.092 false
1.092 false
1.092 false
1.092 false
1.093 false
1.094 false
1.094 false
1.093 false
1.093 false
1.094 false
1.093 false
1.093 false
1.093 false
1.093 false
1.093 false
1.093 false
1.093 false
1.093 false
1.092 false
1.092 false
1.092 false
1.092 false
1.092 false
1.092 false
1.092 false
1.092 false
1.092 false
1.092 false
1.091 false
1.092 false
1.092 false
1.091 false
1.091 false
1.091 false
1.091 false
1.091 false
1.091 false
1.091 false
1.091 false
1.091 false
1.09 false
1.091 false
1.091 false
1.091 false
1.091 false
1.091 false
1.091 false
1.092 false
1.092 false
1.092 false
1.093 false
1.092 false
1.092 false
1.093 false
1.093 false
1.093 false
1.092 false
1.092 false
1.092 false
1.092 false
1.092 false
1.092 false
1.093 false
1.093 false
1.093 false
1.093 false
1.093 false
1.093 false
1.093 false
1.093 false
1.093 false
1.094 false
1.094 false
1.094 false
1.094 false
1.094 false
1.094 false
1.094 false
1.094 false
1.094 false
1.094 false
1.094 false
1.093 false
1.093 false
1.093 false
1.094 false
1.094 false
1.095 false
1.095 false
1.095 false
1.095 false
1.095 false
1.095 false
1.095 false
1.095 false
1.095 false
1.095 false
1.096 false
1.095 false
1.095 false
1.096 false
1.096 false
1.097 false
1.097 false
1.097 false
1.096 false
1.096 false
1.096 false
1.096 false
1.096 false
1.096 false
1.096 false
1.096 false
1.096 false
1.097 false
1.096 false
1.096 false
1.096 false
1.096 false
1.096 false
1.096 false
1.096 false
1.096 false
1.096 false
1.097 false
1.096 false
1.096 false
1.096 false
1.096 false
1.096 false
1.096 false
1.096 false
1.096 false
1.096 false
1.096 false
1.097 false
1.097 false
1.098 false
1.097 false
1.097 false
1.097 false
1.097 false
1.096 false
1.096 false
1.096 false
1.096 false
1.096 false
1.097 false
1.097 false
1.098 false
1.098 false
1.098 false
1.097 false
1.097 false
1.097 false
1.097 false
1.097 false
1.097 false
1.097 false
1.098 false
1.097 false
1.097 false
1.096 false
1.096 false
1.096 false
1.097 false
1.096 false
1.096 false
1.096 false
1.096 false
1.096 false
1.096 false
1.096 false
1.096 false
1.096 false
1.096 false
1.096 false
1.096 false
1.096 false
1.096 false
1.096 false
1.096 false
1.096 false
1.096 false
1.096 false
1.097 false
1.097 false
1.097 false
1.097 false
1.096 false
1.097 false
1.097 false
1.097 false
1.097 false
1.097 false
1.097 false
1.097 false
1.098 false
1.097 false
1.098 false
1.098 false
1.098 false
1.098 false
1.099 false
1.099 false
1.099 false
1.099 false
1.099 false
1.099 false
1.099 false
1.098 false
1.098 false
1.099 false
1.099 false
1.099 false
1.099 false
1.099 false
1.099 false
1.1 false
1.1 false
1.099 false
1.1 false
1.099 false
1.1 false
1.1 false
1.1 false
1.1 false
1.1 false
1.1 false
1.1 false
1.1 false
1.1 false
1.1 false
1.1 false
1.1 false
1.1 false
1.1 false
1.101 false
1.1 false
1.101 false
1.101 false
1.1 false
1.101 false
1.101 false
1.101 false
1.1 false
1.101 false
1.101 false
1.101 false
1.101 false
1.101 false
1.101 false
1.101 false
1.1 false
1.1 false
1.1 false
1.1 false
1.1 false
1.1 false
1.1 false
1.1 false
1.1 false
1.1 false
1.099 false
1.099 false
1.098 false
1.099 false
1.098 false
1.098 false
1.098 false
1.098 false
1.098 false
1.098 false
1.098 false
1.098 false
1.098 false
1.098 false
1.098 false
1.098 false
1.098 false
1.098 false
1.099 false
1.099 false
1.099 false
1.099 false
1.1 false
1.1 false
1.1 false
1.1 false
1.1 false
1.1 false
1.1 false
1.101 false
1.1 false
1.1 false
1.1 false
1.1 false
1.1 false
1.099 false
1.101 false
1.101 false
1.1 false
1.1 false
1.1 false
1.1 false
1.1 false
1.1 false
1.1 false

Forecast data

1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.084
1.085
1.085
1.085
1.086
1.087
1.088
1.089
1.091
1.094
1.097
1.102
1.108
1.114
1.121
1.128
1.135
Forecasts contain uncertainty and can change frequently. For the latest information, always check for up to date flood warnings and alerts in your area.


What effect could these levels have on nearby areas?

Typical range at this location

0.94m to 1.85m.

Above 1.85m flooding of low-lying land may occur in these areas

Above 2.30m some property flooding may occur in these areas

Highest forecast level at this location

The highest level forecast in the next 36 hours is 1.14m at 5:30pm Friday 2 October 2020.

Highest level recorded at this location

2.72m on 30 October 2000


Share this page