We warn the public and emergency responders of severe or hazardous weather which has the potential to cause danger to life or widespread disruption through our National Severe Weather Warning Service.
We issue warnings for rain, snow, wind, fog and ice. These warnings are given a colour depending on a combination of both the likelihood of the event happening and the impact the conditions may have.
Warnings information is displayed throughout our website ensuring you keep up to date with the latest information wherever you are on our site, including:
When a warning is in force there will be a ticker on the homepage. This will provide information on the colour of the warning and the regions affected. Click on a region to view the detail of the warning.
The symbol overview is displayed in the header of every page. The five warning type symbols are coloured depending on the highest level warning of that type in force in the UK. Click on a symbol to view the detail of the warning.
We issue warnings for rain, snow, wind, fog and ice. These warnings will be given a colour depending on a combination of both the likelihood of the event happening and the impact the conditions may have. Learn more about our warnings.
The warnings overview tab provides a visual display of warnings which are in force across the UK each day. The thumbnails provide a quick overview of warnings for a particular day. Click on the appropriate thumbnail to see more detail of the warnings for that day.
The UK map show warnings which are in force for the selected day, click on a warning to see validity times for each warning. The list on the right of the screen shows the regions for which we issue warnings. Clicking on a region will take you to the warnings details tab which shows the details of the warning.
You can pan and zoom around the map using the controls in the top left of the map or by using your mouse to click and drag the map and the mouse wheel to zoom in and out. The coloured areas show where the warning is valid ranging from yellow (least severe) to red (most severe). The symbols identify the type of warning shown in the key below.
The details tab provides further details about each of the warnings plus the Chief Forecasters Assessment.
The centre panel of the page is where you will find the detail about the warning you have selected. This will include the type and colour of warning, issue, start and end times and the text of the warning.
You view the chief forecaster's assessment and the impact matrix which shows why the warning was assigned its colour.
If you have selected a region from the list and more than one warning is in force for that area, then these will all be listed in order of severity. You can expand and contract the different warnings by clicking on the + and - symbol.
The local authorities affected are listed underneath the table.
This section introduces the basic concepts of our warnings service including:
Warnings are issued out to five days ahead for the UK.
There are two types of warning:
Warnings are issued for:
Warnings are based on a combination of:
Warnings are given a colour depending on a combination of both the likelihood of the event happening and the impact the conditions may have.
An example of the matrix used to decide the warning colour is shown below. In this case, an event with a high impact and medium likelihood would result in an amber warning.
The matrix information showing how a warning was assigned its colour will be available for all warnings via the 'Detail' tab on the warnings page. However, you don't need to view this level of detail if you don't want to. You can simply use the following guidance for each colour:
The Chief Forecaster's Assessment explains why the warning has been given the colour it has, as well as indicating where any uncertainties lie and any additional information. Again, you don't need view this level of detail unless you want to.
The following pages provide additional information about the warnings service and what to do during severe weather: