Aviation Briefing Service - FAQs

Questions

Please note: More FAQs will be added on a regular basis. If you have a question, please use the contact form or call 0370 900 0100.

Answers

1. What is the Aviation Briefing Service?

The Aviation Briefing Service is the new name for the General Aviation (GA) service. The Aviation Briefing Service is the Met Office online portal available via secure login, which provides extensive pre-flight weather information to pilots to support flight safety.

2. How do I access the Aviation Briefing Service for pilots?

Create an account to gain access to the free service. You will need to register a username and password.

3. How do I upgrade to Premium?

Once you have registered for the free version of the Aviation Briefing Service and have a username and password, you can upgrade to premium and pay online with your credit card. Subscription is for one year and we will remind you to renew one month before it expires.

4. How much does it cost to upgrade and what will I get for my money?

It costs £57.60 including VAT per year to upgrade your subscription. The Premium version contains additional products. Read Aviation Briefing Service - Guidance for a comparison between the free version and Premium.

5. How can I see a regional bulletin list of Terminal aerodrome forecasts (TAFs) and Aviation routine weather reports (METARs), and also be able to print them out?

All of the TAFs and METARs can now be accessed from the top menu on the home page. From here you can select to see preset regional lists, or to create your own list of favourites. To print your list, please use the printing functionality in your browser. We have optimised the print settings to ensure that the lists print out as economically as possible, and that the preset METAR lists will print on a single side of A4 paper.

If you wish to search for your own locations you need to know the International Civil Aviation Organization (ICAO) codes. In the global search box enter the ICAOs for the locations you are interested in, separated by a space or a comma. Unfortunately we are unable to guarantee that our database will be able to provide data for every location in the world.

6. Can I use the Aviation Briefing Service when I'm flying abroad? I go to international aviation events and want to be able to set my altimeter for whichever country I am in, for example USA?

The Aviation Briefing Service platform is primarily designed to support UK Aviators flying from the UK. It allows access to some European weather data and should be used in conjunction with the services provided by the local regulated provider. We have now added access to global TAFs and METARs in the TAFs and METARs menu.

7. How do I set my own map view?

Within the map layer picker there is an option to save up to 10 of your favourite map views. This means that you can save the map view you use most frequently instead of a full map. This functionality does not enable you to save a map view with open layers on it.

8. How do I see balloon locations on a map?

Use the top menu selector on the homepage to see balloon and aerodrome content. Select 'Balloon locations' to search for site specific ballooning forecast information, or to view the regional ballooning charts. Go to 'Settings' then select 'Preferences', there you will find the option to make the balloon locations page your preferred landing page when logging into the Aviation Briefing Service. Please note this does not stop you from accessing the Aerodromes pages.

9. Where are the mesoscale products in the Aviation Briefing Service platform?

These products are in the premium version of the product only. We have changed the map layer selector to enable map functionality on a mobile phone. We have made the selecting of map layers easier and more intuitive than before. To find the forecast (mesoscale) map layers: open the map layer selector, and select 'FORECAST PRECIPITATION' or 'FORECAST VISIBILITY & CLOUD' and then make your choice. The original 'mesoscale' layer from the old GA platform is called 'Cloud fog and precipitation' and is in the Forecast precipitation category.

10. What is the yellow envelope at the top of the product?

This is for notifications which you should read. We use this functionality to tell you about changes to the product, or when we are investigating a problem for example. The envelope goes white after you have read the notices.

11. Why have you changed the appearance of the wind arrows and fletches?

Customers had fed back that they found them to be cluttered and when shown with temperature in particular, difficult to read. We have decluttered them and coloured them in order to more clearly differentiate the wind speeds.

Wind fletches are colour coded according to their speed (see the key on the map for further information). Wind arrows are also colour coded - they are black when the wind speed is below 15kt and red when they are more than 15kt. You may notice occasions where there are both black and red arrows showing 15kt. This is due to the rounding of data and will show whether the wind speed is slightly higher or lower than 15kt.

12. Why has the map layer picker changed?

It was necessary to make significant changes to the map to enable it to be used on mobile devices. We re-ordered the map layers to make them more intuitive and to make it easier to find the information you require.

13. Why is the password requirement so specific?

Our web delivery platform, which serves not just public content but also commercial services, provides the key security principles of:

• Confidentiality - the ability to hide information from those people unauthorised to see it.
• Integrity - the ability to ensure the data is an accurate and unchanged representation of the original secure information.
• Availability - the ability to ensure the information concerned is readily available to the authorised user.

We encourage a strong password policy to protect our services and our users.

14. Why are the colour states in military METARs different to those that are shown in the Aviation Briefing Service platform?

Military METAR reports also display a colour state - BLU, WHT, GRN, YLO1, YLO2, AMB or RED according to cloud base and visibility. These thresholds are different to the colours used to display the observations in the Aviation Briefing Service. BLACK indicates the runway is unusable.

A summary of the differences is shown in the table below:

15. How are the wind gust values, in the ballooning forecast, derived?

The wind gust values used in the ballooning forecast are calculated from a high resolution model and should give a good guide to gusts in the type of light wind conditions that balloonists are interested in.

However there are a few things to be aware of:

• When the mean wind speed is greater than 15kts the gust speeds shown tend to be higher than is realistic. Please note that where you see gust speeds elsewhere on Met Office products they calculate gust speeds in a different way, which gives more accurate values at higher mean wind speeds. (It is recognised that balloons do not normally fly when the surface mean wind speed is greater than 15 kts; the forecast model chosen should give a good guide to gusts when mean wind speed is below 15 kts.)
• The high resolution model used to calculate the gust speeds uses a modelling methodology called ‘Best Data’. Best Data is used to forecast the most likely meteorological conditions for a particular location and at specific times, including gusts, showers and other elements. The gusts forecasts provided are therefore influenced by the other meteorological parameters also being forecast for that same time/location. For example, if a forecast for Bath at 1400 coincides with a forecast shower at that time and location, the gust from the associated downdraught would be presented in the forecast. If that shower did not materialise (or occurred just a few kilometres away), the actual gustiness at the balloon location at that time would likely be lower than forecast.  
• Showers/thunderstorms may not always form in the exact location shown in the forecast, and the potential for these stronger gusts will move with it. While appreciating the weather sensitivity of balloons and, given the inherent uncertainties of site specific forecasting, it is important to recognise the value of airmanship and observation when planning, to account for these uncertainties.

16. When does the model data update on the Aviation Briefing Service platform?

• For the forecast 'wind and temperature' type layers (in 3-hourly timesteps) it is supplied by a model that runs at 6-hourly intervals. This means that the forecast data shown will update at approx 04:00UTC, 09:30UTC 16:00UTC, and 21:30UTC.
• For the other forecast map layers (like forecast precipitation rate/type, visibility, and the cloud layers) the first 5 or 6 hours of the forecast is updated every hour. For the timesteps that follow this the model data is updated every 3 hours, and will update at approx 02:30UTC, 05:30UTC, 08:30UTC, 11:30UTC. 14:30UTC, 17:30UTC. 20:30UTC, 23:30UTC.

17. Why have you removed the 3-day planner from the new Premium version of the Aviation Briefing Service?

The decision to remove this from the new product was based on usage analytics. This was a forecaster-created product and based on usage, it was not cost-effective to maintain. We hope that by extending the time steps of some of the layers you will still be able to access the information this product provided.

18. What are the wind/temperature profile validity and issue times? (Applies to ballooning only)

The graphics are valid for:

• 0600 and 1800 UTC between 15 March and 30 September
• 0900 and 1500 between 1 October and 14 March

Both will be updated around 0230, 0830, 1430 and 2030 UTC.

19. What are the text forecast validity and issue times? (Applies to ballooning only)

• All times are UTC
• Updated forecasts will be displayed shortly after the time of issue

(Summer) 15 March until 30 September

Morning forecast

Issue time:  8.30pm the previous day

Period of validity: 4am to 10am

Outlook: 3 hour period to dusk

 

Morning forecast

Issue time: 2.30am

Period of validity: 4am to 10am

Outlook: 3 hour period to dusk

 

Afternoon/evening forecast

Issue time: 8.30am

Period of validity: 3pm to 9pm

Outlook: Dawn to 3 hours after dawn the next day

 

Afternoon/evening forecast

Issue time: 2.30pm

Period of validity: 3pm to 9pm

Outlook: Dawn to 3 hours after dawn the next day

 

(Winter) 1 October until 14 March

Morning forecast

Issue time: 8.30pm the previous day

Period of validity: 5am to 11am

Outlook 3 hour period to dusk

 

Morning forecast

Issue time: 2.30am

Period of validity: 5am to 11am

Outlook: Midday to dusk

 

Afternoon/evening forecast

Issue time: 8.30am

Period of validity: 12pm to 6pm

Outlook: Dawn to midday the next day

 

Afternoon/evening forecast

Issue time: 2.30pm

Period of validity: 12pm to 6pm

Outlook: Dawn to midday the next day

20. Summary of site-specific data available to balloonists

The following table describes the forecasts that balloonists are able to view at any given time.

• All times are UTC
• Updated forecasts will be displayed shortly after the time of issue

Examples:

1. at 0830, the full current AM and PM forecasts will be issued, along with site specific model data for following morning
2. by 2030, the full current PM and tomorrow’s AM forecasts will be issued, along with site specific model data for tomorrow afternoon.

‘Full forecast’ contain all site specific model and forecaster data

‘Data only’ contains just site specific model data

21. When are the map layers and model data updated?

Each map layer group is updated at different times, these are specified below.

Please note:

• The data shown on the map will auto-refresh every 5 minutes from the time you load the map. On each auto-refresh, the Aviation Briefing Service platform will check whether new model data has come in, and if appropriate it will update the map layers with the new data.
• The time at which model data comes in day-to-day can vary slightly.
• The data shown on the map will auto-refresh every 5 minutes from the time you load the map. On each auto-refresh, the Aviation Briefing Service platform will check whether new model data has come in, and if appropriate it will update the map layers with the new data.

Map layer group: Forecast wind and temp

Map layer names:

• Wind Fletches Surface

• Wind Fletches FL020

• Wind Fletches FL050

• Wind Fletches FL100

• Wind Arrows Surface

• Wind Arrows FL020

• Wind Arrows FL050

• Wind Arrows FL100

• Wind and Temp FL020

• Wind and Temp FL050

• Wind and Temp FL100

• Temperature FL020

• Temperature FL050

• Temperature FL100

Spatial coverage: 

Global

Timestep periods and intervals: 

To T+36 hours at 3hr intervals, then 6hr intervals to T+120 hours

Model update times: 

0000, 0600, 1200 & 1800 UTC

Time that the updated data becomes available on the website: 

approx 4.5 hrs after each model run i.e at: 0430, 1030, 1630 & 2230 UTC

Resolution of the model used: 

17km x 17km

 

Map layer group: Forecast precipitation

Map layer names:

• Precipitation Rate and Pressure

• Precipitation Type and Pressure

Spatial coverage: 

UK

Timestep periods and intervals: 

To T+36 hours at 1hr intervals

Model update times: 

Data in the first 6 hours updates hourly. The rest of the data is updated at 0300, 0900, 1500 & 2100 UTC

Time that the updated data becomes available on the website: 

The first 6 hours in the timeline will update at approx 27 minutes past the hour. The rest of the data will update approximately 3.5 hours after the model run

Resolution of the model used: 

2km x 2km

 

Map layer name:

• Cloud, fog and precipitation

Spatial coverage: 

UK

Timestep periods and intervals: 

To T+36 hours at 1hr intervals

Model update times: 

0300, 0900, 1500 & 2100 UTC

Time that the updated data becomes available on the website: 

approx 3.5 hours after each model run

Resolution of the model used: 

2km x 2km

 

Map layer group: Forecast Visibility and Cloud

Map Layer names:

• Pressure and total cloud

Spatial coverage:  

UK

Timestep periods and intervals: 

To T+36 hours at 1hr intervals

Model update times: 

Data in the first 6 hours updates hourly. The rest of the data is updated at 0300, 0900, 1500 & 2100 UTC

Time that the updated data becomes available on the website: 

The first 6 hours in the timeline will update at approx 27 minutes past the hour. The rest of the data will update approximately 3.5 hours after the model run

Resolution of the model used: 

2km x 2km

 

Map layer names:

• Cloud below 1000ft

• Cloud ground to 5000ft

• Visibility and pressure

• Cloud fog and precipitation

Spatial coverage:  

UK

Timestep periods and intervals: 

To T+36 hours at 1hr intervals

Model update times: 

0300, 0900, 1500, & 2100 UTC

Time that the updated data becomes available on the website: 

approx 3.5 hours after each model run

Resolution of the model used: 

2km x 2km

22. Mobile devices

Please note:

• The map feature works best in portrait mode on mobile devices
• On iOS devices, the Aviation Briefing Service platform works best when private browsing mode is NOT used